WO2017177926A1

WO2017177926A1 - Data transmission processing method and apparatus

Info

Publication number: WO2017177926A1
Application number: PCT/CN2017/080294
Authority: WO
Inventors: 李立广; 徐俊; 许进
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-04-13
Filing date: 2017-04-12
Publication date: 2017-10-19
Also published as: CN107294652A

Abstract

The present application provides a data transmission processing method and apparatus. The method comprises: receiving feedback information of a reception end; and performing, according the feedback information, data processing by using one of the following modes: dividing a next source data packet to obtain multiple sub data blocks, and adding CRC sequences to the multiple sub data blocks, performing channel coding on the sub data blocks to which the CRC sequences have been added, so as to obtain original packets consisting of multiple channel coding blocks, performing packet coding on the original packets to obtain check packets, and perform bit selection on the multiple channel coding blocks and the check packets, so as to obtain initially-transmitted data; and determining the quantity of bits of retransmitted data, and selecting retransmitted data from a first data set according to the quantity of the bits of retransmitted data, or selecting retransmitted data from the first data set and the second data set, the first data set at least comprising a bit set of check packet system bits, and the second data set at least comprising a bit set of original packet check bits.

Description

Data transmission processing method and device

Technical field

The present application relates to, but is not limited to, the field of communications, and in particular, to a data transmission processing method and apparatus.

Background technique

At present, the use of various handheld devices such as mobile phones, electronic watches, tablet computers, etc., the demand for wireless communication applications is growing rapidly. Future types of wireless mobile services, such as e-banking, e-health and e-learning, are expected to increase capacity by nearly 1,000 times over the next decade. And the current human-centered communication will gradually transform into a large number of communication between objects, called the Internet of Things, which can make human life more efficient, more comfortable and safer. Future fifth-generation (5G) wireless mobile standards will be designed to meet these needs.

In the wireless digital communication system, there are two major parts, a transmitting end and a receiving end, wherein the general transmitting end includes an information source module, a channel encoding module, a modulation module, and a transmitting module, and the receiving end includes a receiving signal module and a demodulating module. , channel decoding module and acquiring source data module. In digital communication, channel coding is a key module, mainly to improve the reliability of data transmission, and to correct the errors in the transmission process by increasing the redundant information of the channel coding codeword, so as to resist the fading in the channel. And the impact of various noises on the transmitted data. More commonly used channel coding techniques, such as LDPC (Low Density Parity Check Code), Turbo (turbo) coding, convolutional coding, RM (Reed and Muller initials) encoding, RS (Reed) - and Solomon, Reed Solomon code, BCH (BCH code is taken from the initials of three names such as Bose, Ray-Chaudhuri and Hocquenghem). Among them, the check matrix of LDPC is very sparse, so the decoding complexity is not high, and it has natural decoding parallelism. It can achieve higher decoding throughput by parallel decoding, and the performance is very close to the Shannon limit. Now LDPC coding The method has been used in a variety of communication systems; Turbo coding encodes information by two component codes, and iterative decoding using two-part component codes can improve decoding performance, and performance is very good at low and medium bit rates, and codes The rate and code length can be flexibly set, and it is well adapted to various communication data. In the existing LTE (Long Term Evolution) communication system, the Turbo coding method is mainly adopted; the current coding output of the convolutional coding is not only current Information related and Some of the previous information is related, similar to convolution characteristics, the decoding effect is better, and it is also used in many systems; RS coding is a shortest code distance maximization code, and decoding can be pipelined decoding. The code speed is high and the throughput is high. In order to enable the receiving end to correctly judge whether the received data packet or the information block in the encoded codeword is correct, in the digital communication, the data packet or the codeword information block needs to be verified, that is, some check sequence is added, such as Cyclic Redundancy Check (CRC).

In the actual communication system, not only channel coding technology is needed to improve the reliability of data transmission, but also a retransmission mechanism is needed to ensure the reliability and user experience of data transmission. A commonly used retransmission method is Hybrid Automatic Repeat ReQuest (HARQ), which combines Forward Error Correction (FEC) and Automatic Repeat Request (ARQ). And the technology formed. The traditional HARQ scheme, which introduces channel coding only on the basis of ARQ, adds cyclic redundancy check (CRC) bits to the transmitted data packet and performs forward channel coding. The receiving end performs channel decoding and CRC check on the received data, and discards the data of the erroneous packet if there is an error, and feeds back NACK (Negative Acknowledgement) information to the transmitting end to request retransmission of the same data packet as the previous frame. . Generally, in a communication system, the physical layer sets a limit on the maximum number of retransmissions to prevent a user's data packets from being continuously retransmitted due to long-term bad slow fading of the channel, thereby wasting channel resources. If the maximum number of retransmissions is reached, the receiving end still cannot correctly decode, then the packet transmission error is determined and the packet is discarded, and then the transmitting end is notified to send a new data packet. There is another full incremental redundancy scheme. Under this scheme, after the information bits are encoded, the encoded parity bits are punctured according to a certain period, and are sequentially sent to the receiving end according to the code rate compatibility principle. The receiving end does not discard the transmitted error packets, but combines them with the received retransmission packets for decoding; wherein the retransmission data is not a simple copy of the transmitted data, but additional redundant information. The receiving end performs combined decoding every time, and combines all the bits received before to form a codeword with a lower code rate, thereby obtaining a larger coding gain and achieving the purpose of increasing redundancy. And the retransmission mechanism of the multi-state feedback information, that is, the number of bits of the retransmitted data is indicated by the feedback information, because the multi-state feedback information not only carries the information of the correctness of the receiving end, but also carries some channel-related information. The information, in turn, allows for a more flexible configuration of the number of bits of the retransmitted data and the Modulation Code Scheme (MCS).

Although the data hybrid retransmission method described above will achieve a certain throughput performance, but Since all the channel coding blocks in the original packet are incrementally retransmitted during the retransmission process, the problem is that some channel coding blocks may have been received correctly, and if the source data packet is received incorrectly, it is still retransmitted. Redundant data that decodes the correct channel coding block (there is no need to retransmit the data at this time), which greatly reduces the efficiency of retransmitting data, thereby reducing system throughput. Moreover, in the future 5G wireless mobile communication system or other communication (WiFi communication, communication between various devices, etc.), a large amount of data needs to be transmitted to support various user application requirements and improve the user experience.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

In order to meet the requirements of higher and higher communication system throughput and improve the efficiency of each HARQ transmission, the present application provides a data transmission processing method and apparatus, which can improve the throughput and efficiency of the communication system.

In a first aspect, the embodiment of the present application provides a data transmission processing method, which is used by a sending end, and includes:

Receiving feedback information of the receiving end, according to the feedback information, performing data processing in one of the following ways:

The first method comprises: dividing a next source data packet to obtain a plurality of sub-blocks, adding a CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence to obtain multiple channel coding. An original packet formed by the block, performing packet coding on the original packet to obtain a verification packet, and performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data;

Manner 2: determining a number of retransmitted data bits, selecting the retransmitted data from the first data set according to the number of retransmitted data bits, or selecting the retransmitted data from the first data set and the second data set; The first data set includes at least a bit set of a check packet system bit; the second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, the check The packet is obtained by packet encoding the original packet.

In an exemplary embodiment, if the feedback information indicates a reception error, the processing is performed in the second mode.

In an exemplary embodiment, when the number of retransmitted data bits is less than or equal to N0, the retransmission data is selected from the first data set; wherein N0 is a positive integer.

In an exemplary embodiment, performing packet encoding on the original packet to obtain a verification packet includes:

Performing check coding on a bit set formed by E bits of the same index of the E packets included in the original packet, and obtaining n check sets having a length of e bits, where the index in the n check sets is i n bits constitute an ith sub-check packet, i=0, 1, ..., (e-1), obtain an e-sub-check packet, the check packet includes the e-sub-check packet, where E is The number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is an integer greater than 0, and the check coding adopts one of the following coding modes: single parity coding, BCH coding, RM coding, RS coding.

In an exemplary embodiment, when the check code employs a single parity code, the check packet includes 1 sub-check packet.

In an exemplary embodiment, the first set of data includes one of: verifying all bits of the packet, all system bits of the check packet.

In an exemplary embodiment, the second set of data includes one of: all check bits of the original packet, all bits of the original packet, all check bits of the original packet, and all check bits of the check packet.

In an exemplary embodiment, the N0 is T times the number of bits of any one of the first pass data or T times the number of bits of any one of the check packets in the check packet, where T is a positive integer.

In an exemplary embodiment, when the number of retransmitted data bits is greater than N0, the retransmission data is selected from the first data set and the second data set, and each sub-school in the retransmitted data is determined according to at least one of the following: The number of bits of the packet and the number of bits per packet: the total number of bits of the first transmission data, the number of packets in the original packet, the number of bits of any packet in the original packet, the total number of bits of retransmitted data, the modulation order, Retransmit the number of data resources; where N0 is a positive integer.

In an exemplary embodiment, a total number of bits of the plurality of sub-check packets in the retransmission data is equal to a difference between a total number of bits of the first transmission data and a total number of bits of all the plurality of data packets in the retransmission data; Or equal to a difference between a product of the number of retransmitted resources and the modulation order and a total number of bits of all the plurality of data packets in the retransmitted data; or equal to a total number of bits of the retransmitted data and the Retransmits the difference in the total number of bits of all packets in the data.

In an exemplary embodiment, the number of retransmitted data bits includes at least one of: a product of a number of retransmission resources and a modulation order; a total number of bits of the first transmission data; and a preset positive integer.

In an exemplary embodiment, if the feedback information indicates erroneous reception, the number of retransmitted data bits is greater than or equal to the number of bits of any one of the first transmission data and is less than or equal to the total amount of the first transmission data. An integer of the number.

In an exemplary embodiment, the feedback information includes at least two error states, which are used to indicate that the number of retransmitted data bits is respectively: the total number of bits of the first transmission data, and the number of bits of any one of the first transmission data.

In an exemplary embodiment, the determining the number of retransmitted data bits may include:

Determining, according to the feedback information, a number of retransmitted data bits from a preset retransmission data bit number set, where the preset retransmission data bit number set includes a elements, and the i-1th element value is smaller than the i th element value, i =2,...,(a-1), a is an integer greater than one.

In an exemplary embodiment, in the preset retransmission data bit number set, the second element value is equal to the number of bits of any one of the first transmission data.

In an exemplary embodiment, in the preset retransmission data bit number set, the i-th element value is equal to the i-th element value plus ΔD, where i=2, . . . , (a-1), ΔD is greater than An integer of 1.

In an exemplary embodiment, the ΔD is equal to a positive integer power of 2, or is equal to Z times the number of bits of any one of the first transmission data, where Z is an integer greater than zero.

In an exemplary embodiment, the preset retransmission data bit number set includes at least one element whose element value is equal to 0.

In an exemplary embodiment, in the preset retransmission data bit number set, the second element value is greater than or equal to the number of bits of any one of the first transmission data, and the tail element value is greater than or equal to the total transmission data. The number of bits.

In an exemplary embodiment, if the feedback information indicates that the data is received correctly, the processing is performed in the first mode.

In an exemplary embodiment, the original packet includes an E-packet, wherein the j-th packet includes a Cj-coded channel coding block; and the original packet check bit is all channel coding blocks in the original packet. Check bit, the check packet system bit is the original packet system bit for packet encoding The original packet system bit is the systematic bit of all channel coding blocks in the original packet, and the check packet check bit is the original packet check bit for packet coding; wherein E is a positive integer, j=0, 1, ..., ( E-1), Cj is a positive integer; the channel coding is one of the following coding methods: turbo coding, LDPC coding, convolutional coding, and Polar coding.

In a second aspect, the embodiment of the present application further provides a data transmission processing method, which is used by the receiving end, and includes:

Receiving transmission data of the transmitting end and decoding;

Sending feedback information to the sending end according to the decoding result, where the feedback information is used to instruct the sending end to perform data processing in one of the following manners:

In an exemplary embodiment, if the decoding result is incorrect, the feedback information is used to indicate that the sending end performs data processing according to mode one or mode two; if the decoding result is correct, the feedback information is used to indicate The sender performs data processing in accordance with mode one.

In an exemplary embodiment, if the received transmission data error block rate is equal to 0, the feedback information 0 is sent to indicate that the transmitting end performs processing according to mode one; and the received transmission data error block rate is not 0, if the received transmission data error block rate is greater than T(i-1) and less than or equal to Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; wherein Ti is a preset threshold The i-th element of the set T, and T(i-1)<Ti, the feedback information i is the i-th element in the preset feedback information set, and Di is the i-th element in the set D of the preset retransmission data bits. Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set T includes a elements and wherein the first and last element values are equal to 0 and 1, respectively, and the preset feedback information set includes a elements, Set the number of retransmitted data bits Including a element, a is an integer greater than 1, and the error block rate is a ratio of the number of all error blocks in the received Q share transmission data to the number of all channel coding blocks in the received Q share transmission data, where Q is a positive integer.

In an exemplary embodiment, in the preset retransmission data bit number set D, the i-th element value is equal to the i-th element value plus ΔD, where i=2, . . . , (a-1), ΔD is An integer greater than one.

In an exemplary embodiment, in the preset retransmission data bit number set D, the second element value D1 is equal to the number of bits of any one of the first transmission data, and D(a-1) is greater than or equal to the first The total number of bits of data transmitted.

In a third aspect, the embodiment of the present application further provides a data transmission processing device, which is disposed at the sending end, and includes:

The first receiving module is configured to receive feedback information of the receiving end;

The first data processing module includes: a dividing unit configured to split the source data packet to obtain a plurality of sub-data blocks; and adding a unit, configured to add a CRC sequence to the plurality of sub-data blocks respectively; and the channel coding unit is set as a pair The sub-blocks after adding the CRC sequence are respectively subjected to channel coding to obtain an original packet composed of a plurality of channel coding blocks; the packet coding unit is configured to perform packet coding on the original packet to obtain a parity packet; the first bit selection unit, Setting to perform bit selection on the plurality of channel coding blocks and check packets to obtain first transmission data;

Retransmitting the data processing module, comprising: a determining unit, configured to determine a number of retransmitted data bits; and a second bit selecting unit configured to select the retransmitted data from the first data set according to the number of retransmitted data bits, or Selecting the retransmitted data from the first data set and the second data set;

The first data set includes at least a bit set of a check packet system bit; the second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, the check The packet is obtained by packet encoding the original packet.

In an exemplary embodiment, the second bit selection unit is further configured to select the retransmission data from the first data set when the number of retransmitted data bits is less than or equal to N0; wherein N0 is positive Integer.

In an exemplary embodiment, the retransmission data processing module further includes a packet encoding unit; the packet encoding unit includes: a check encoding subunit and a check packet acquiring subunit;

The check coding subunit is configured to perform check coding on a bit set formed by E bits of the same index of the E packets included in the original packet, to obtain n check sets having a length of e bits;

The check packet acquisition subunit is configured to form an i-th sub-check packet, i=0, 1, . . . , (e-1), to obtain an e-index of i in the n check sets. a verification packet, wherein the verification packet includes the e-sub-check packet, where E is the number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is greater than 0. An integer, the check coding adopts one of the following coding methods: single parity coding, BCH coding, RM coding, and RS coding.

In an exemplary embodiment, the second bit selecting unit is further configured to: when the number of retransmitted data bits is greater than N0, select the retransmitted data from the first data set and the second data set, according to the following At least one of determining the number of bits per sub-check packet in the retransmitted data and the number of bits per packet: the total number of bits of the first transmitted data, the number of packets in the original packet, the number of bits of any packet in the original packet, The total number of bits of the data, the modulation order, and the number of retransmitted data resources are retransmitted; wherein N0 is a positive integer.

In an exemplary embodiment, if the feedback information of the receiving end indicates erroneous reception, the number of retransmitted data bits is greater than or equal to the number of bits of any one of the first transmission data and is less than or equal to the total bit of the first transmission data. An integer of the number.

In an exemplary embodiment, the second bit selection unit further configured to determine, according to the feedback information of the receiving end, the number of retransmitted data bits from the preset retransmitted data bit number set, where the preset retransmitted data bit number set includes a element, the first element value in the set of preset retransmission data bits is equal to 0, and the value of the i-1th element is smaller than the value of the i-th element, i=2,..., (a-1), a is greater than 1. Integer.

In a fourth aspect, the embodiment of the present application further provides a data transmission processing device, which is disposed at the receiving end, and includes:

a second receiving module, configured to receive transmission data of the transmitting end and perform decoding;

The feedback module is configured to send feedback information to the sending end according to the decoding result, where the feedback information is used to instruct the sending end to process in one of the following manners:

Method 1: segmenting the next source data packet to obtain a plurality of sub-data blocks, and the plurality of sub-data blocks Adding a CRC sequence to the data block, performing channel coding on the sub-blocks after adding the CRC sequence to obtain an original packet composed of a plurality of channel coding blocks, and performing packet coding on the original packet to obtain a verification packet, where Multiple channel coding blocks and check packets are bit-selected to obtain first-pass data;

In an exemplary embodiment, the feedback module is further configured to: if the received transmission data error block rate is equal to 0, send feedback information 0, to indicate that the sending end performs processing according to mode one; If the received data error block rate is not 0, if the received transmission data error block rate is greater than T(i-1) and less than or equal to Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; where Ti is the i-th element of the preset threshold set T, and T(i-1)<Ti, the feedback information i is the i-th element in the preset feedback information set, and Di is the preset retransmission data bit The i-th element of the number set D, Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set T includes a elements and wherein the first and last element values are equal to 0 and 1, respectively, The feedback information set includes a elements, the preset retransmission data bit number set includes a elements, a is an integer greater than 1, and the error block rate is the number of all error blocks in the Q shares received transmission data and the The Q shares receive a ratio of the number of all channel coding blocks in the transmission data, where Q is a positive integer.

In a fifth aspect, the embodiment of the present application further provides a data transmission processing method, which is used by the sending end, and includes:

Receiving feedback information of the receiving end;

Determining a number of retransmitted data bits when the feedback information at the receiving end indicates a receiving error; selecting retransmission data from the first data set according to the number of retransmitted data bits, or selecting from the first data set and the second data set Retransmitting data;

The first data set includes at least a bit set of a check packet system bit; The two data sets include at least a bit set of original packet check bits; the original packet includes a plurality of data packets, and the check packet is obtained by performing packet encoding on the original packet.

In an exemplary embodiment, the method may further include: when the feedback information of the receiving end indicates that the data is received correctly, or when the feedback information of the receiving end indicates the receiving error, segmenting the next source data packet to obtain a plurality of sub-data blocks, Adding a cyclic redundancy check CRC sequence to the plurality of sub-blocks, performing channel coding on the sub-blocks after adding the CRC sequence to obtain an original packet composed of a plurality of channel coding blocks, and performing the original packet The packet coding obtains a verification packet, and performs bit selection on the plurality of channel coding blocks and the verification packet to obtain first transmission data.

In an exemplary embodiment, before the receiving the feedback information of the receiving end, the foregoing method may further include:

Segmenting a source data packet to obtain a plurality of partial data data blocks, adding a cyclic redundancy check CRC sequence to the plurality of partial data data blocks, and separately performing channel coding on the sub-data blocks after adding the CRC sequence to obtain multiple channels An original packet consisting of a coding block, performing packet coding on the original packet to obtain a verification packet, and performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data;

The first pass data obtained by the transmission.

In an exemplary embodiment, when the number of retransmitted data bits is less than or equal to N0, the retransmission data is selected from the first data set;

When the number of retransmitted data bits is greater than N0, the retransmission data is selected from the first data set and the second data set, and the number of bits and each bit of each sub-check packet in the retransmitted data is determined according to at least one of the following: Number of bits of the data packet: the total number of bits of the first transmission data, the number of data packets in the original packet, the number of bits of any data packet in the original packet, the total number of bits of retransmitted data, the modulation order, and the number of retransmitted data resources; , N0 is a positive integer.

In addition, the embodiment of the present application further provides a terminal, including a processor and a machine readable medium, where the machine readable medium stores instructions, when the instructions are executed by the processor, implementing the first aspect and the second aspect. Aspect or the data transmission processing method of the fifth aspect.

Furthermore, the embodiment of the present application further provides a machine readable medium having stored thereon instructions for implementing the data transmission processing method of the first aspect, the second aspect or the fifth aspect when the instruction is executed by the processor.

The present application has the following beneficial effects: The present application can improve system throughput and enhance the robustness of data transmission.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a data transmission processing method of Embodiment 5 according to a related aspect of the present application;

2 is a diagram showing an example of packet encoding of Embodiment 1 according to a related aspect of the present application;

3 is a diagram showing an example of a system/check bit and a system/check bit in a check packet in the original packet according to Embodiment 1 of the present application;

4 is a schematic structural diagram of a data transmission processing apparatus of Embodiment 2 according to related aspects of the present application;

5 is a schematic structural diagram of a retransmission data processing module of Embodiment 2 according to related aspects of the present application;

6 is a flowchart of a first pass data processing method of Embodiment 3 according to related aspects of the present application;

7 is a communication link diagram of a base station and an in-vehicle system of Example 1 according to related aspects of the present application;

8 is a diagram showing an example of an original packet and a verification packet of Example 1 provided in accordance with related aspects of the present application;

9 is a diagram showing an example of throughput performance in Example 1 provided in accordance with related aspects of the present application;

10 is a schematic structural diagram of a turbo encoder having a code rate of 1/3 in an LTE system;

11 is a rate matching diagram of a turbo coded output codeword bit sequence in an LTE system;

12 is a diagram showing an example of convolutional coding in Example 6 provided in accordance with related aspects of the present application;

FIG. 13 is a diagram showing an example of bit selection in Embodiment 1 according to related aspects of the present application; FIG.

14 is a diagram showing an example of data hybrid retransmission processing for a receiving end in Embodiment 4 according to a related aspect of the present application;

15 is a diagram showing an example of packet encoding of a transmitting end in Example 5 according to related aspects of the present application;

16 is a diagram showing an example of bit selection by retransmission version in Example 5 according to related aspects of the present application;

17 is a diagram showing an example of performing sequential bit selection in Example 5 according to related aspects of the present application;

FIG. 18 is a flowchart of a data transmission processing method of Embodiment 1 according to related aspects of the present application; FIG.

19 is a diagram showing an example of first pass data of Embodiment 5 provided in accordance with related aspects of the present application;

20 is an example of a polarization encoding method of Example 6 provided in accordance with related aspects of the present application.

Detailed

The present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments and the embodiments in the present application and the features in the respective examples may be combined with each other without conflict.

Example 1

A data transmission processing method is provided in this embodiment. FIG. 18 is a flowchart of a data transmission processing method according to an embodiment of the present invention. The method is used by the transmitting end. As shown in FIG. 18, the process includes the following steps:

S1800. Determine a number of retransmitted data bits.

S1801: Select the retransmission data from the first data set according to the number of retransmitted data bits, or select the retransmission data from the first data set and the second data set;

In step S1801, if the number of retransmitted data bits is less than or equal to N0, the retransmission data is selected from the first data set, where N0 is a preset positive integer. When the number of retransmitted data bits is small, it can be directly selected from the first data set. In this case, only the data of the check packet needs to be transmitted, so that the receiving end can decode all the channel coding blocks with greater probability, and the occupation is more successful. Less transmission of transmission resources, so the transmission efficiency is higher, which can improve the throughput of the system.

In an exemplary embodiment, in step S1801, the verification packet is obtained by performing packet encoding on the original packet, and the packet encoding method includes: forming E bits of the same index of all E packets in the original packet. The bit set is subjected to check coding, and n check sets each having an e-bit length are obtained, wherein n bits of the index in the n check sets constitute i-th sub-check packet, i=0, 1, ..., (e-1), obtaining an e-sub-check packet, the check packet being composed of e-sub-check packets, where E is the number of packets in the original packet, and n is the data in the original packet The number of packet bits, e is an integer greater than 0, and the check coding adopts one of the following coding methods: single parity coding, BCH coding, RM coding, and RS coding.

The packet coding is as shown in FIG. 2, and the E-bit 202 of the index E of all the E-packets 200 in the original packet is subjected to check encoding 210, and the j-th check set 203 of length e is obtained, j= 0,1,...,(n-1), n sets of check sets can be obtained, and all n bits of the check set whose index is i constitute the i-th sub-check packet Pi, where i=0, 1, ... (e-1), thereby obtaining a verification packet 201 composed of e sub-check packets. The check code may also be at least one of shortened coding and puncturing coding of the coding method described above, and a check set having a corresponding number of bits of e bits is obtained. The advantage of the packet coding method is that all channel coding blocks can be linked, so that iterative decoding methods can be used in the reception decoding to improve the decoding performance. The single parity check code has only a check set of e=1 bits, such as single parity check coding for a bit set of length y, then the check set of the 1-bit is equal to all y bits of the bit set. Cumulative exclusive OR, such as p0=a0⊕a1⊕...⊕a(y-1), where p0 is a check bit, a0...a(y-1) is a set of bits; the BCH code is a cyclic code ( Taken from Bose, Ray-Chaudhuri and Hocquenghem, with complete algebraic theory calculations, can correct multiple errors, the encoding process is based on the generator polynomial g(x)=g0×x ^(e-1) +g1×x ^(e-2) +...+g(e-1) is encoded, and the input bit set is also represented by a polynomial, such as the input bit set is [a0...a(t-1)], and the polynomial can be expressed as a(x) =a0×x ^(t-1) +a1×x ^(t-2) +...+a(t-1), BCH coding can be calculated according to the BCH coding rule c(x)=a(x)g(x) a word, where c(x) is a BCH coded word, and a check set is obtained by taking a check bit from c(x), and a check set can be selected from the check bits to form a check set; the RS code is BCH coded One is multi-domain coding, and it needs a multi-generation For the term g(x), the input multivariate domain polynomial is a(x)=a0×x ^(t-1) +a1×x ^(t-2) +...+a(t-1), at this time, g(x) And the coefficients in a(x) are all multivariate domains, and the RS codeword c(x) can be calculated according to c(x)=a(x)g(x), where the multivariate domain refers to the multivariate Galois The domain, for example, is represented by 4 bits, which is a 16-ary field; RM coding is a block code, and a generator matrix G is required. The input information bit sequence is s, and the RM codeword is c=G*s, where The codeword c needs to be a system code, and the check bit of the RM codeword c can be taken out to obtain a check set; the check code can also include an e-bit check code as follows: the input bit set is s, for the s A subset of Set0 is binary-OR-added to obtain a 0th check bit; a binary XOR is added to a subset of the new set of bit sets s and 0th check bits to obtain the first one. Checking bits; performing binary exclusive-OR addition on a subset of the set of bits s and the 0th check bit and the first set of check bits to obtain the second check bit; and so on, s and e-1 schools that have been calculated A subset of the new set consisting of bits is set to perform binary exclusive-OR addition to obtain the (e-1)th check bit, wherein the Set0=[0,1,2,...,(n -1)], Set1 is all even or odd numbers from 0 to n. By performing packet coding on the encoded information packet, a plurality of channel coding blocks can be associated, which is beneficial to improve coding gain, and the packet coding scheme can make the number of bits of the retransmitted data larger, if smaller, directly The data of the verification packet is very flexible.

As shown in FIG. 3, the j-th data packet S _j in the original packet 300 includes a Cj-coded channel coding block, where Cj is an integer greater than 0, and the channel coding is one of the following coding modes: Turbo coding, LDPC coding, convolutional coding, Polar coding. A verification packet 301 is obtained by a packet encoding method, which is as described above. As shown in FIG. 3, the i-th sub-check packet in the check packet also includes a C-part data block, and the C-part data block is obtained by packet coding by a plurality of channel coding blocks, and the C-part data block is obtained. It also belongs to the corresponding channel coding codeword space, so channel decoding can also be performed. Therefore, the C data blocks in the parity packet also have systematic bits and check bits, and the system bits are completely passed by the system bits in the original packet. The code is obtained, and the check bit is obtained by the block code of the check bit in the original packet, that is, the check packet system bit is the original packet system bit for packet coding, and the check packet check bit is the original packet. The check bits are obtained by packet coding, and the original packet check bits are check bits of all channel coding blocks in the original packet, and the original packet system bits are system bits of all channel coding blocks in the original packet; The maximum value in C0, C1, ..., C(E-1), i = 0, 1, ..., (e-1). Wherein, the original packet system bits are information bits (channel bits of all channel coding) that enter channel coding in all channel coding blocks, as shown in FIG. 3; the original packet check bits are bits in all channel coding blocks except system bits. (checksum or redundancy bits of all channel coding), as shown in FIG. 3; the check packet system bits are bits obtained by packet encoding of all original packet system bits, as shown in FIG. 3; The systematic bits are bits in the parity packet other than the systematic bits, as shown in FIG.

Prior to packet encoding, the i-th packet of the original packet is padded with n-ni bits such that the number of bits per packet reaches n bits, where i=0, 1, ..., (E-1), Ni is the number of i-th packet bits, and ni is an integer greater than or equal to zero. The purpose is to make the number of bits of each data packet in the original packet equal before the packet coding, to facilitate the execution of the packet coding, the padded bit is "0" or some pseudo bits, and the verification in the packet coding The encoding does not work.

In the packet coding, if the check code uses a single parity check, the check packet includes only one sub-check packet. That is, the check packet can be expressed as P0=S0⊕S1⊕...⊕S(E-1), where P0 is a check packet, and S0, S1, ..., S(E-1) are E shares in the original packet. data pack. At this time, the encoding of the single parity encoding is relatively simple, and the cumulative exclusive OR can be directly implemented, and the decoding end is relatively simple. For example, the min-sum algorithm can be used to achieve the performance, and the performance can be greatly improved.

In an exemplary embodiment, the first data set includes all bits of the check packet, ie, as shown in FIG. 3, including system bits and check bits of the check packet; the second data set includes all the schools of the original packet The bit is checked, as shown in Figure 3, the original packet check bits. Or the first data set includes all bits of the check packet, that is, as shown in FIG. 3, including the check packet system bit and the check bit; the second data set includes all bits of the original packet, as shown in FIG. System bits and check bits of the original packet. At this time, the preset positive integer N0 is equal to the number of bits of the data packet in the first transmission data, that is, equal to the number of bits of any data packet in the original packet as shown in FIG. 3.

Alternatively, the first data set includes all system bits of the check packet, that is, system bits including only the check packet, and the cyclic bit selection from the first data set is performed in units of system bit blocks of the channel coding block. The selection is made; the second data set includes the check bits of the original packet and the check bits of the check packet. Alternatively, the first data set includes all system bits of the check packet, ie, system bits including only the check packet; the second data set includes all bits of the original packet. Alternatively, the first data set includes all system bits of the check packet, and the second data set includes check bits of the original packet. At this time, the N0 is equal to the number of system bits of the check packet.

In the retransmission data described above, the difference between the maximum value and the minimum value is less than or equal to 1 among the number of bits of the plurality of retransmission data packets in the retransmission data. In this way, it is advantageous for the number of bits of each data packet in the original packet to be as equal as possible, so that the performance is basically the same, the "short board" effect does not occur, and the overall reception error rate performance of the retransmitted data is increased.

Determining, according to the feedback information and the first transmission data, the number of bits of the retransmitted data, if the receiving end is reversed If the feed information indicates an erroneous reception, the number of retransmitted data bits is equal to one of the following parameters: the total number of bits of the first transmission data, and the number of bits of any one of the first transmission data; at this time, the feedback information of the receiving end is at least Two error states NACK1, NACK2 are included, indicating the number of different retransmitted data bits. Alternatively, if the feedback information of the receiving end indicates erroneous reception, the number of retransmitted data bits is equal to one of the following parameters: the total number of bits of the first transmission data, Q0, and the number of bits of any one of the first transmission data; Q0 is an integer greater than the number of bits of any one of the first data and less than the total number of bits of the first transmission data; at this time, the feedback information of the receiving end includes at least three error states indicating the different retransmission data. The number of bits.

In an exemplary embodiment, in the retransmission data, the number of retransmitted data bits is equal to a product of a modulation order and a number of preset retransmission resources, and the modulation order is a number of bits carried by a single constellation modulation symbol, such as BPSK (binary Phase shift keying) The modulation order is equal to 1, as QPSK (Quadrature Phase Shift Keying) modulation order is equal to 2, 8PSK (eight phase shift keying) modulation order is equal to 3, such as 16QAM (hexadecimal quadrature amplitude) Modulation) The modulation order is equal to 4, such as 32QAM (32-ary quadrature amplitude modulation) modulation order is equal to 5, such as 64QAM (64-ary quadrature amplitude modulation) modulation order is equal to 6, such as 128QAM (128-ary orthogonal The amplitude modulation) modulation order is equal to 7, such as 256QAM (256-ary quadrature amplitude modulation) modulation order is equal to 8 and so on; the preset number of retransmission resources is the number of constellation modulation symbols of the transmission transmission preset by the system. The number of bits of the retransmission check packet is equal to the difference between the number of retransmitted data bits and the total number of bits of all the multiple retransmitted data packets. Alternatively, the number of retransmitted data bits is equal to the total number of bits of the first transmitted data. Alternatively, the number of retransmitted data bits is equal to a preset positive integer, which may be indicated by feedback information or preset by the system, and other non-limited manners to obtain the positive integer. The retransmission data is cyclically selected from at least one of a first data set and a second data set, wherein the data is fetched from the circular buffer, and if the last bit is taken, the first bit is taken until the corresponding number of bits is obtained. So far, the start bit of the cyclic selection is obtained by the retransmission version number, or is equal to the index position of the previous transmission data plus one at the index position in the first data set or the second data set. As shown in FIG. 13, the second data set includes all bits 1300 of the original packet (including original packet system bits and original packet parity bits), and the first data set includes parity packet system bits 1301 (the first data set does not include the school) Checking the check bits, so not shown in the figure), the cyclically selecting the second data set, performing bit selection in units of channel coding blocks, and channel coding after performing bit selection in each data packet Among the number of bits of the block, the difference between the maximum value and the minimum value is less than or equal to 1, when the bit selected by the bit is already corresponding to the channel coding block and belongs to the second data set. The tail bit is selected from the first bit of the channel coding block. For example, the cyclic bit of the 0th channel coding block in the 0th data packet S0 is selected to collect bit data from the start bit, and when the tail bit is reached, The first bit starts to be selected; the first data set and the performance cycle selection are cyclic bit selection according to each system bit rate in each sub-check packet, and the first bit is selected from the system bit block. The bits start to be selected.

Example 2

In the present embodiment, a data transmission processing apparatus is provided. FIG. 4 is a block diagram of a data transmission processing apparatus according to an embodiment of the present invention, which is used for a transmitting end. As shown in FIG. 4, the retransmission data processing module 401 includes the following unit. :

Determining a unit, configured to determine a number of retransmitted data bits;

a second bit selecting unit, configured to obtain the retransmitted data according to one of the following manners according to the number of retransmitted data bits: a, the retransmitted data is selected from the first data set; b, the retransmitted data is from Selecting at least one of a second data set and a first data set; wherein the first data set is a bit set including at least a check packet system bit, and the second data set is at least an original packet check bit A set of bits, the original packet containing a plurality of data packets, the verification packet being obtained by packet encoding the original packet.

The verification packet is obtained by performing packet coding by the original packet, and the retransmission data processing module 401 includes a packet coding unit as described below. As shown in FIG. 5, the packet coding unit may include: a verification coding subunit 500, Setting a bit set formed by E bits of the same index of all E packets in the original packet to perform check coding, and obtaining n check sets each having an e-bit length; the check packet obtaining sub-unit 501 is set to be The n bits of the n check sets whose indices are all i constitute an i-th sub-check packet, i=0, 1, . . . , (e-1), and obtain an e-sub-check packet, where the check packet is obtained by The e-part check packet is constructed, where E is the number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is an integer greater than 0, and the check code adopts the following coding mode. One: single parity coding, BCH coding, RM coding, RS coding. The coding method described above is as described in Embodiment 1.

Example 3

In this embodiment, a data transmission processing method is provided for the sending end, which includes the following steps:

S0, receiving feedback information of the receiving end;

S1, if the feedback information indicates that the error is received, and if it is the first retransmission, the first retransmission data is sent to the receiving end, which includes: determining the number of retransmitted data bits; according to the number of retransmitted data bits, selecting the following manner Deriving the retransmission data: a, the retransmission data is selected from a first data set; b, the retransmission data is selected from at least one of a second data set and a first data set; wherein The first data set is a bit set including at least a check packet system bit, the second data set is a bit set including at least an original packet check bit, and the original packet includes a plurality of data packets, where the check packet is a The original packet is obtained by packet coding.

In an exemplary embodiment, the processing procedure of the first transmission data corresponding to the first retransmission data is as shown in FIG. 6 , and includes the following steps: S600, dividing the source data packet to obtain an E sub-data block; S601 Channel coding the jth sub-block to obtain the jth data packet, j=0, 1, ..., (E-1), obtaining the original packet composed of the E packets; S602, the original at a predetermined code rate The packet is bit-selected to obtain the first pass data.

The verification packet is obtained by performing packet coding on the original packet, and the packet encoding method described above is as described in Embodiment 1. The purpose of packet coding is to establish a plurality of data blocks by packet coding, and a relatively large gain can be obtained when decoding is performed at the receiving end. The packet-encoded check packet is mainly transmitted in the retransmitted data, and can be compatible with the original communication system without changing the first-pass data, and can improve the throughput performance of the retransmitted data.

In an exemplary embodiment, in step S1, the number of bits of the retransmission data is equal to the number of bits of the first transmission data; and, in the retransmission data, among the number of bits of the E packets of the bit selection output, The difference between the maximum value and the minimum value is less than or equal to 1, and E is an integer greater than one.

In an exemplary embodiment, a single parity check code is used in the packet coding, that is, the check packet includes only one sub-check packet, and the length is n. In step S1, the check packet obtained by the bit selection is obtained. The number of bits is equal to the difference between the number of retransmitted data bits and the total number of bits of the E-retransmission data packets obtained by all bits, wherein the number of retransmitted data bits is equal to the number of first transmitted data bits. The number of bits of the plurality of retransmission data packets is: n1 is the number of bits of the retransmitted data packet, and the length of the E-d1 channel coding block is n1-1, where

D1=mod(N-n', n1-1); or, both equal to [(N-n')/(E+1)]; where N is the number of retransmitted data bits, n' is the first pass data The number of bits in any one packet, E is the number of packets in the original packet,

Represents the smallest integer greater than or equal to the real number x, mod(x ₁ , x ₂ ) represents the modulo operation of the integer x ₂ for the integer x ₁ , and the formula [x] represents rounding the integer, or taking the integer down, or up Integer. The number of retransmitted data bits is equal to the number of first transmitted data bits, and the check packet of the retransmitted data and the number of bits of each data packet can be calculated according to the number of first transmitted data bits, which is simple to calculate, and the occupied resources are the same as the first transmitted data. It can be transmitted on the same scheduling resource without resending the instruction to indicate resource scheduling information. Or the number of the retransmitted data bits is equal to the product of the modulation order and the number of system preset resources. At this time, the check packet of the retransmitted data and the number of bits of each data packet are calculated by the number of resources allocated by the system. At this time, the current system resources can be fully utilized, and transmitted on new system resources, and the resource utilization rate is high.

Example 4

In this embodiment, a data transmission processing method is provided for the receiving end. As shown in FIG. 14, the method includes the following steps:

S1400, receiving transmission data of the transmitting end;

S1401: Decode the received transmission data;

S1402: If the decoding result is incorrect, send feedback information to the sending end, where the sending end may determine the number of retransmitted data bits according to the feedback information and the first transmission data, and select one of the following manners to obtain the retransmitted data: a And the retransmitted data is selected from the first data set; b, the retransmitted data is selected from at least one of the second data set and the first data set; wherein the first data set includes at least a check packet A set of bits of systematic bits, the second set of data being a set of bits comprising at least an original packet check bit, the original packet comprising a plurality of data packets, the check packet being obtained by packet encoding the original packet.

In step S1402, if the received transmission data error block rate is greater than T(i-1) and less than Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; wherein Ti is a preset threshold set The i-th element of T, and 0<T(i-1)<Ti<1, the feedback information i is the i-th element in the feedback information set, and Di is the i-th element in the set D of preset retransmission data bits Di is an integer greater than 0, and D(i-1)<Di; the received transmission data error block rate is the number of all error blocks in the received Q transmission data and the received Q transmission data The ratio of the number of all channel coding blocks, where Q is a positive integer. Generally, the 0th element T0=0 in the preset threshold set T; the 0th element in the feedback information set is ACK (indicating correct reception), other elements indicate erroneous reception; retransmission number According to the number of bits, the 0th element D0=0 in the set D. The benefit of the method is that the feedback information is multi-state, and the number of retransmitted data bits can be flexibly set, and can adapt to channel changes. Retransmitting data only requires an estimated number of bits, which can greatly improve resource utilization and can improve Throughput performance of the entire system and system total capacity.

In step S1402, if the error block rate of the received transmission data is greater than 0 and less than T', the feedback information 1 (NACK1) is sent, indicating that the number of retransmitted data bits is equal to any one of the first transmission data. a number of packets; if the error block rate of the received transmission data is greater than or equal to T', sending feedback information 2 (NACK2), indicating that the number of retransmitted data bits is equal to the number of bits of the first transmission data; wherein, T' is greater than A real number of 0 and less than 1, the error block rate is a ratio of the number of error blocks in the received transmission data to the number of all code blocks.

In step S1402, the method may further include: if the error block rate of the received transmission data is greater than 0 and less than T0, sending feedback information 1 (NACK1), indicating that the number of retransmitted data bits is equal to any one of the first transmission data. If the error block rate of the received transmission data is greater than or equal to T0 and less than T1, send feedback signal 2 (NACK2), indicating that the number of retransmitted data bits is equal to Q0; if the received transmission data is incorrect The code block rate is greater than or equal to T1, and the feedback information 3 (NACK3) is sent, indicating that the number of retransmitted data bits is equal to the number of bits of the first transmission data; wherein, 0<T0<T1<1, the error block rate is the received transmission data. The ratio of the number of error blocks to the number of all code blocks, Q0 is an integer greater than the number of bits of any one of the first transmission data and less than the total number of bits of the first transmission data.

Example 5

In this embodiment, a data transmission processing method is provided for the transmitting end. As shown in FIG. 1, the method includes the following steps:

S101. Receive feedback information of the receiving end.

S102. Perform data processing according to the feedback information in one of the following manners:

The first method is: dividing a source data packet to obtain a plurality of sub-blocks, adding a CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence to obtain a plurality of channel coding blocks. The original packet, the original packet is packet-encoded to obtain a verification packet, and the plurality of channel coding blocks and the verification packet are bit-selected to obtain first-pass data;

Manner 2, as shown in FIG. 18, step S1800, determining the number of retransmitted data bits; step S1801, selecting the retransmission data from the first data set according to the number of retransmitted data bits, or from the first data set and Selecting the retransmission data in the second data set; wherein the first data set includes at least a bit set of the check packet system bits; the second data set includes at least a bit set of the original packet check bits; The original packet includes a plurality of data packets, and the verification packet is obtained by packet encoding the original packet.

It should be noted that, in this embodiment, after receiving the feedback information, the sending end may retransmit the last transmission data according to the mode 2, or process the next source data packet according to the mode 1 when the feedback information indicates the receiving error. Corresponding first transmission data, the first transmission data obtained by the transmission; when the feedback information indicates that the reception is correct, the next source data packet may be processed according to the method 1, and the corresponding first transmission data is obtained, and the obtained first transmission data is transmitted.

As shown in FIG. 19, the first pass data processing process (ie, mode one) may include the following steps:

S1900, dividing the source data packet to obtain an H1 sub-data block;

S1901: Add a CRC sequence of length I bits to the H1 sub-blocks;

S1902: Perform polarization coding on the H1 partial sub-blocks after adding the CRC sequence to obtain an H1 partial polarization coding block;

S1903: Perform packet coding on all bits or partial bits of the H1 partial polarization coding block to obtain an H2 partial parity check packet, where the H1 partial polarization coding block and the H2 partial parity check packet constitute first transmission data, where H1 is an integer greater than 1, H2 is an integer greater than 0, and I is an integer greater than or equal to zero.

In an exemplary embodiment, in step S1801, when the number of retransmitted data bits is less than or equal to N0, the retransmission data is selected from the first data set; wherein N0 is a positive integer. When the number of retransmitted data bits is small, it can be directly selected from the first data set. In this case, only the data of the check packet needs to be transmitted, so that the receiving end can decode all the channel coding blocks with greater probability, and the occupation is more successful. Less transmission of transmission resources, so the transmission efficiency is higher, which can improve the throughput of the system.

The packet encoding the original packet to obtain the verification packet may include: performing a check coding on a bit set formed by E bits of the same index of the E packets included in the original packet, and obtaining n lengths as a check set of e bits, the n bits of the index of i in the n check sets Forming an i-th sub-check packet, i=0, 1, ..., (e-1), obtaining an e-sub-check packet, the check packet including the e-sub-check packet, where E is the original The number of data packets in the packet, n is the number of data packet bits in the original packet, and e is an integer greater than 0. The check coding adopts one of the following coding modes: single parity coding, BCH coding, RM coding, RS code. When the check code uses a single parity code, the check packet contains 1 sub-check packet.

In an exemplary embodiment, the first set of data includes one of: verifying all bits of the packet, all system bits of the check packet. The second set of data includes one of: all check bits of the original packet, all bits of the original packet, all check bits of the original packet, and all check bits of the check packet.

In an exemplary embodiment, the N0 is T times the number of bits of any one of the first pass data or T times the number of bits of any one of the check packets in the check packet, where T is a positive integer. When the number of retransmitted data bits is greater than N0, the retransmission data is selected from the first data set and the second data set, and the number of bits and each bit of each sub-check packet in the retransmitted data is determined according to at least one of the following: Number of bits of the data packet: the total number of bits of the first transmission data, the number of data packets in the original packet, the number of bits of any data packet in the original packet, the total number of bits of retransmitted data, the modulation order, and the number of retransmitted data resources; , N0 is a positive integer. The total number of bits of the plurality of sub-check packets in the retransmission data is equal to a difference between a total number of bits of the first transmission data and a total number of bits of all the plurality of data packets in the retransmitted data; or, equal to the a difference between a product of the number of retransmitted resources and the modulation order and a total number of bits of all the plurality of packets in the retransmitted data; or equal to a total number of bits of the retransmitted data and all of the retransmitted data The difference between the total number of bits of multiple packets. The number of retransmitted data bits includes at least one of: a product of a number of retransmission resources and a modulation order; a total number of bits of the first transmission data; and a preset positive integer.

In an exemplary embodiment, if the feedback information indicates that the data received by the receiving end is erroneous, the number of retransmitted data bits is greater than or equal to the number of bits of any one of the first transmission data and is less than or An integer equal to the total number of bits of the first pass data. The feedback information includes at least two error states, NACK1 and NACK2, for indicating the number of retransmitted data bits: the total number of bits of the first transmission data, and the number of bits of any one of the first transmission data.

In an exemplary embodiment, step S1801 may include: determining, according to feedback information of the receiving end, a number of retransmitted data bits from a preset retransmitted data bit number set, wherein the preset retransmission number According to the number of bit sets, including a element, the first element value in the set of preset retransmission data bits is equal to 0, and the value of the i-1th element is smaller than the value of the i-th element, i=2, . . . , (a-1), a is an integer greater than one. In the preset retransmission data bit number set, the second element value is equal to the number of bits of any one of the first transmission data. In the preset retransmission data bit number set, the i-th element value is equal to the i-1th element value plus ΔD, where i=2, . . . , (a-1), ΔD is greater than or equal to the preset retransmission data. An integer of the second element value in the set of bit numbers. Or, in the preset retransmission data bit number set, the second element value is greater than or equal to the number of bits of any one of the first transmission data, and the tail element value is greater than or equal to the total number of bits of the first transmission data.

In an exemplary embodiment, the original packet includes an E-packet, wherein the j-th packet includes a Cj-coded channel coding block; and the original packet check bit is all channel coding blocks in the original packet. Check bits, the check packet system bits are obtained by packet coding of original packet system bits, the original packet system bits are system bits of all channel coding blocks in the original packet, and the check packet check bits are original packet check bits. Packet coding is obtained; where E is a positive integer, j=0, 1, ..., (E-1), Cj is a positive integer; the channel coding is one of the following coding methods: turbo coding, LDPC coding, convolutional coding, Polar coding.

Example 6

Step S1400, receiving transmission data of the transmitting end;

Step S1401: decoding the received transmission data;

Step S1402: If the decoding result is incorrect, send feedback information to the sending end, where the feedback information is used to instruct the sending end to perform data processing in one of the following manners:

The first method is: dividing a source data packet to obtain a plurality of sub-blocks, adding a CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence to obtain a plurality of channel coding blocks. The original packet, the original packet is packet-encoded to obtain a verification packet, and the plurality of channel coding blocks and the verification packet are bit-selected to obtain the first transmission data; or

Manner 2: determining a number of retransmitted data bits, selecting the retransmitted data from the first data set according to the number of retransmitted data bits, or selecting the first data set and the second data set Retransmitting data; wherein the first data set includes at least a bit set of check packet system bits; the second data set includes at least a bit set of original packet check bits; and the original packet includes multiple data packets The verification packet is obtained by performing packet coding on the original packet.

It should be noted that, if the decoding result is correct, the feedback information sent to the sending end is used to instruct the sending end to perform data processing according to the mode 1. In this case, the transmitting end can process the pair of next source data packets according to the manner to obtain corresponding information. The first pass data, and the resulting first pass data is transmitted.

In an exemplary embodiment, if the received transmission data error block rate is equal to 0, the feedback information 0 is sent to indicate that the transmitting end does not need to retransmit the data, and the sending end performs processing according to the mode 1; The transmission data error block rate is greater than T(i-1) and less than or equal to Ti, and the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; wherein Ti is the i-th element of the preset threshold set T, And T(i-1)<Ti, the feedback information i is the i-th element in the preset feedback information set, Di is the i-th element in the set D of preset retransmission data bits, and Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set includes a elements and wherein the first and last element values are equal to 0 and 1, respectively, the preset feedback information set includes a elements, and the preset retransmission data bit number set includes a The elements, a is an integer greater than 1, and the error block rate is a ratio of the number of error blocks in the received transmission data to the number of all channel coding blocks in the received transmission data.

In an exemplary embodiment, in the preset retransmission data bit number set D, the i-th element value is equal to the i-th element value plus ΔD, where i=2, . . . , (a-1), ΔD is An integer greater than one. Or, in the preset retransmission data bit number set D, the second element value D1 is greater than or equal to the number of bits of any one of the first data, and D(a-1) is greater than or equal to the total data of the first transmission. The number of bits.

Example 7

In this embodiment, a data transmission processing apparatus is provided, which is disposed at the transmitting end, as shown in FIG. 4, and includes the following modules:

The first receiving module 402 is configured to receive feedback information of the receiving end;

The first pass data processing module 400 includes: a splitting unit configured to split the source data packet to obtain a plurality of sub-data blocks; and an adding unit configured to add a CRC sequence to the plurality of sub-blocks; the channel coding unit is set to be The sub-blocks after adding the CRC sequence respectively perform channel coding to obtain an original packet composed of a plurality of channel coding blocks; the packet coding unit is configured to perform packet coding on the original packet to obtain a verification packet; and the first bit selection unit , set to edit the plurality of channels The code block and the check packet perform bit selection to obtain first pass data;

The retransmission data processing module 401 includes: a determining unit, configured to determine a number of retransmitted data bits; and a second bit selecting unit configured to select the retransmitted data from the first data set according to the number of retransmitted data bits, Or selecting the retransmission data from the first data set and the second data set;

The first data set includes at least a bit set of a check packet system bit; the second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, and the check packet is The original packet is obtained by packet coding.

In an exemplary embodiment, the retransmission data processing module 401 further includes a packet encoding unit; as shown in FIG. 5, the packet encoding unit includes: a check encoding subunit 500, a check packet acquiring subunit 501;

The check coding sub-unit 500 is configured to perform check coding on a bit set formed by E bits of the same index of the E-packets included in the original packet, to obtain n check sets of e-bit length;

The check packet obtaining subunit 501 is configured to form an nth sub-check packet, i=0, 1, . . . , (e-1), by n bits of the n check sets in the index i. An element check packet, wherein the check packet includes the e-sub-check packet, where E is the number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is greater than 0 An integer that is one of the following encoding methods: single parity encoding, BCH encoding, RM encoding, and RS encoding.

In an exemplary embodiment, the second bit selecting unit is further configured to: when the number of retransmitted data bits is greater than N0, select the retransmitted data from the first data set and the second data set, according to the following At least one of determining the number of bits of each sub-check packet in the retransmission data and the number of bits of each packet: the total number of bits of the first transmission data, the number of data packets in the original packet, the number of bits of any data packet in the original packet, The total number of bits of the data, the modulation order, and the number of retransmitted data resources are retransmitted; wherein N0 is a positive integer.

In an exemplary embodiment, the second bit selection unit further configured to determine, according to the feedback information of the receiving and receiving end, the number of retransmitted data bits from the preset retransmitted data bit number set, where the preset retransmitted data bit number set Including a element, the first element value in the preset retransmission data bit number set is equal to 0, and the i-1th element value is smaller than the i-th element value, i=2,..., (a-1), a is greater than 1 The integer.

In an exemplary embodiment, the segmentation unit in the first pass data processing module 400 is configured to segment the source data packet to obtain an H1 sub-block;

Adding a unit, configured to add a CRC sequence of length I bits to the H1 sub-blocks;

a channel coding unit, configured to perform polarization coding on the H1 partial sub-blocks after adding the CRC sequence to obtain an H1 partial polarization coding block;

a packet coding unit, configured to perform packet coding on all bits or partial bits of the H1 partial polarization coding block to obtain an H2 sub-check packet,

a first bit selecting unit, configured to determine that the H1 partial polarization coding block and the H2 partial parity check packet constitute first transmission data;

Where H1 is an integer greater than 1, H2 is an integer greater than 0, and I is an integer greater than or equal to zero.

Example 8

In this embodiment, a data transmission processing device is provided, which is disposed at the receiving end and includes the following modules:

The feedback module is configured to: if the decoding result is incorrect, send feedback information to the sending end, where the feedback information is used to indicate that the sending end processes in one of the following manners:

The first method is: dividing a source data packet to obtain a plurality of sub-blocks, adding a CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence Obtaining an original packet composed of a plurality of channel coding blocks, performing packet coding on the original packet to obtain a verification packet, and performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data;

In an exemplary embodiment, the feedback module is further configured to: if the received transmission data error block rate is equal to 0, send feedback information 0, which is used to indicate that the transmitting end does not need to retransmit data, and the sending end according to the manner If the received transmission data error block rate is greater than T(i-1) and less than or equal to Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; wherein Ti is a preset The i-th element of the threshold set T, and T(i-1)<Ti, the feedback information i is the i-th element in the preset feedback information set, and Di is the i-th element in the preset re-transmitted data bit number set D Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set includes a elements and wherein the first and last element values are equal to 0 and 1, respectively, and the preset feedback information set includes a element, Let the set of retransmitted data bits include a element, a is an integer greater than 1, the error block rate is the number of all error blocks in the received Q shares of transmission data and all channel coding in the received Q shares of transmission data The ratio of the number of blocks, where Q is a positive integer.

Example 9

In this embodiment, a data transmission processing method is provided for the sending end, including:

The first method is: dividing a source data packet to obtain a plurality of sub-blocks, adding a CRC sequence to the plurality of sub-blocks, and then performing channel coding on the sub-blocks after adding the CRC sequence to obtain a plurality of channel coding blocks. The original packet is configured to perform packet coding on the original packet to obtain a verification packet, and perform bit selection on the multiple channel coding block and the verification packet to obtain first transmission data;

Manner 2: determining a number of retransmitted data bits, selecting the retransmitted data from the first data set according to the number of retransmitted data bits, or selecting the retransmitted data from the first data set and the second data set;

In an exemplary embodiment, if the feedback information indicates a reception error, the processing is performed in the second mode. When the number of retransmitted data bits is less than or equal to N0, the retransmission data is selected from the first data set; wherein N0 is a positive integer.

The packet encoding the original packet to obtain the verification packet may include: performing a check coding on a bit set formed by E bits of the same index of the E packets included in the original packet, and obtaining n lengths as a check set of e bits, wherein n bits of index i in the n check sets constitute an i-th sub-check packet, i=0, 1, ..., (e-1), and obtain an e-sub-check packet, The check packet includes the e-sub-check packet, where E is the number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is an integer greater than 0, the school The coding uses one of the following coding methods: single parity coding, BCH coding, RM coding, and RS coding. When the check code uses a single parity code, the check packet contains 1 sub-check packet.

In an exemplary embodiment, the N0 is T times the number of bits of any one of the first pass data or T times the number of bits of any one of the check packets in the check packet, where T is a positive integer. When the number of retransmitted data bits is greater than N0, the retransmission data is selected from the first data set and the second data set, and the number of bits and each of each sub-check packet in the retransmitted data is determined according to at least one of the following: Number of bits of the data packet: the total number of bits of the first transmission data, the number of data packets in the original packet, the number of bits of any data packet in the original packet, the total number of bits of retransmitted data, the modulation order, and the number of retransmitted data resources; , N0 is a positive integer. The total number of bits of the plurality of sub-check packets in the retransmission data is equal to a difference between a total number of bits of the first transmission data and a total number of bits of all the plurality of data packets in the retransmission data; or, equal to the retransmission a difference between the number of resources and the modulation order and the total number of bits of all the plurality of packets in the retransmitted data; or equal to the total number of bits of the retransmitted data and all the multiples of the retransmitted data The difference in the total number of bits in the packet.

In an exemplary embodiment, the feedback information includes at least two error states NACK1 and NACK2, which are used to indicate that the number of retransmitted data bits is respectively: the total number of bits of the first transmission data, and any one of the first transmission data. The number of bits.

In an exemplary embodiment, the determining the number of retransmitted data bits may include: determining, according to the feedback information, a number of retransmitted data bits from a preset retransmitted data bit number set, wherein the preset retransmitted data bit number set Including a element, the first element value in the preset retransmission data bit number set is equal to 0, and the i-1th element value is smaller than the i-th element value, i=2,..., (a-1), a is greater than 1 The integer. In the preset retransmission data bit number set, the second element value is equal to the number of bits of any one of the first transmission data. And, in the preset retransmission data bit number set, the i-th element value is equal to the i-1th element value plus ΔD, where i=2, . . . , (a-1), ΔD is an integer greater than 1. Or, in the preset retransmission data bit number set, the second element value is greater than or equal to the number of bits of any one of the first transmission data, and the tail element value is greater than or equal to the total number of bits of the first transmission data. If the feedback information indicates that the data is received correctly, the processing is performed in the source packet mode.

Example 10

In this embodiment, a data transmission processing method is provided for the receiving end, including:

Receiving the transmission data of the transmitting end and decoding the data; if the decoding result is incorrect, sending the feedback information to the transmitting end, where the feedback information is used to indicate that the sending end performs the following manner data processing:

In an exemplary embodiment, if the received transmission data error block rate is equal to 0, the feedback information 0 is sent to instruct the transmitting end to perform processing according to mode 1; otherwise, if the received transmission data error block rate is If the value is greater than T(i-1) and less than or equal to Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; where Ti is the i-th element of the preset threshold set T, and T(i-1) <Ti, the feedback information i is the i-th element in the preset feedback information set, Di is the i-th element in the set D of preset retransmission data bits, Di is an integer greater than 0, and D(i-1) <Di; the preset threshold set T includes a elements and wherein the first and last element values are equal to 0 and 1, respectively, the preset feedback information set includes a elements, and the preset retransmission data bit number set includes a elements, a is An integer greater than 1, the error block rate being a ratio of the number of all error blocks in the received Q shares of transmission data to the number of all channel coding blocks in the received Q shares of transmission data, where Q is a positive integer.

In an exemplary embodiment, in the preset retransmission data bit number set D, the i-th element value is equal to the i-th element value plus ΔD, where i=2, . . . , (a-1), ΔD is An integer greater than one. In an exemplary embodiment, in the preset retransmission data bit number set D, the second element value D1 is equal to the number of bits of any one of the first transmission data, and D(a-1) is greater than or equal to the first The total number of bits of data transmitted.

Example 11

In this embodiment, a data transmission processing apparatus is provided, which is disposed at the sending end, and includes:

The first data processing module includes: a dividing unit configured to segment the source data packet to obtain a plurality of sub-data blocks; and adding a unit, configured to add a cyclic redundancy check CRC sequence to the plurality of sub-data blocks respectively; the channel coding unit And configured to perform channel coding on the sub-blocks after adding the CRC sequence to obtain an original packet composed of a plurality of channel coding blocks; and a packet coding unit configured to perform packet coding on the original packet to obtain a verification packet; a bit selection unit configured to perform bit selection on the plurality of channel coding blocks and the check packet to obtain first transmission data;

The second bit selection unit is further configured to select the retransmission data from the first data set when the number of retransmitted data bits is less than or equal to N0; wherein N0 is a positive integer.

The retransmission data processing module further includes a packet encoding unit; the packet encoding unit includes a check encoding subunit and a check packet acquiring subunit; and the check encoding subunit is set to be included in the original packet The bit set formed by the E bits of the same index of the E packets is subjected to check coding, and n check sets of e bits are obtained; the check packet acquisition subunit is set as the n check sets The n bits of the index i constitute an i-th sub-check packet, i=0, 1, . . . , (e-1), and obtain an e-sub-check packet, where the check packet includes the e-sub-check packet, wherein E is the number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is an integer greater than 0, and the check coding adopts one of the following coding modes: single parity coding, BCH coding, RM coding, RS coding.

When the feedback information of the receiving end indicates erroneous reception, the number of retransmitted data bits is an integer greater than or equal to the number of bits of any one of the first transmission data and less than or equal to the total number of bits of the first transmission data.

The second bit selection unit further determines, according to the feedback information of the receiving and receiving end, the number of retransmitted data bits from the preset retransmitted data bit number set, wherein the preset retransmitted data bit number set includes a element, and the preset The value of the first element in the set of retransmission data bits is equal to 0, and the value of the i-1th element is smaller than the value of the i-th element, i=2, . . . , (a-1), a is an integer greater than one.

Example 12

In this embodiment, a data transmission processing apparatus is provided, which is disposed at the receiving end, and includes:

The first method is: dividing a source data packet to obtain a plurality of sub-blocks, adding a cyclic redundancy check CRC sequence to the plurality of sub-blocks, and then performing channel coding on the sub-blocks after adding the CRC sequence respectively An original packet formed by a plurality of channel coding blocks, performing packet coding on the original packet to obtain a verification packet, and performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data;

In an exemplary embodiment, the feedback module is further configured to: if the received transmission data error block rate is equal to 0, send feedback information 0, to indicate that the sending end performs processing according to mode one; otherwise, if The received transmission data error block rate is greater than T(i-1) and less than or equal to Ti, and the feedback is sent. The information i is used to indicate that the number of retransmitted data bits is equal to Di; wherein Ti is the i-th element of the preset threshold set T, and T(i-1)<Ti, and the feedback information i is the preset feedback information set i elements, Di is the i-th element in the set D of preset retransmission data bits, Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set T includes a element and the first of them And the tail element values are equal to 0 and 1, respectively, the preset feedback information set includes a elements, the preset retransmission data bit number set includes a elements, a is an integer greater than 1, and the error block rate is Q shares received. The ratio of the number of all error blocks in the transmitted data to the number of all channel coding blocks in the Q shares of the received transmission data, where Q is a positive integer.

The application is described below with some examples.

Example 1

According to an aspect of the present application, in a wireless data communication system, which may be used in a base station, the base station may include: an Access Point (AP), or may be referred to as a Node B, a radio Network Controller (RNC), Evolved Node B (eNB), Base Station Controller (BSC), Base Transceiver Station (BTS), Base Station (BS), Transceiver Function (TF), Radio Router, Radio Transceiver, Basic Service Unit (BSS), Extended Service Unit (ESS), Radio Base Station (RBS), or some other terminology.

As shown in FIG. 7, it is a link example of a wireless communication system employing various aspects of the present application for communication between an in-vehicle system and a base station. The transmitting end 700 sends the data 703 to the receiving end 701, and the receiving end 701 sends the feedback signal 702 to the sending end 700 according to the correct situation of receiving the data. The sending end 700 may be a base station, or may be other devices or devices as described above. The receiving end 701 can be an in-vehicle system, or can be a handheld device such as a tablet computer, a reading machine, an electronic watch, and other electronic devices or interconnected electronic devices, wireless modems, and laptop computers that need to access the Internet. , personal computers, in-vehicle devices, mobile phones, wireless access nodes, sensor nodes, etc.

The various algorithms and methods and apparatus modules described herein can be used for transmission between base station 700 and in-vehicle system 701 in a wireless communication system. The transmission processing method of the present application can also be applied to an LTE communication system, a WiFi system, a high frequency communication system, and a future 5G communication system. The length of the source data packet to be transmitted is 4240 bits. The channel coding adopts Turbo coding in the LTE system. The code rate set by the system is 1/2, the constellation modulation mode is 16QAM, and the maximum number of retransmissions. M = 3 (ie, the maximum number of transmissions is 4). As shown in FIG. 7, the base station 700 transmits service data to the in-vehicle system 701, and receives feedback information sent by the in-vehicle system 701. If the transmitted service data is first-pass data, the process of processing the first-pass data includes the following steps:

1. The source data packet of length 4240 bits is segmented to obtain d=10 partial data blocks, and the number of bits of each sub-block is 424;

2. Turbo coding the th-th sub-block to obtain the j-th packet, j=0, 1, ..., 9, obtaining the original packet composed of d=10 packets; the j-th packet is included Cj=1 copies the encoded Turbo coding block, and adds an 8-bit CRC sequence before Turbo coding, so that each sub-block has a length of 432 bits, and the 432-bit sub-block is Turbo-coded to obtain a length of 1308. a bit-coded Turbo coded block;

3. Perform bit selection on the original packet at a predetermined code rate of 1/2 to obtain the first transmission data. The bit selection adopts a cyclic selection method, and a Turbo coded block having a length of 1308 bits is placed in a circular buffer, and bit data is sequentially taken out when the bit is selected, and the first bit is selected if the tail bit is reached. Since the predetermined code rate is 1/2, the number of bits of the Turbo coded block after each rate matching is 864, so that the total number of bits of the first transmission data is 8640. If the bit selection is performed in order, the selected starting index position is 0, that is, starting from the first bit, and the next retransmission data is selected at the index position of the tail bit index position plus one, the next transmission of this example The bit selection starting index position is 864; and if the version number is used for bit selection, the starting index position of the bit selection is related to the retransmission version number r _i , the Turbo coding block total length N _cb and the interleaving depth R _sb , The starting bit index position in the example is st _i = R _sb × (2 [N _cb / (8R _sb )] × r _i + 2), and the version number set is r = [0 2 1 3], in the set Contains 4 elements (up to 4 times of data transmission), corresponding to the version number of each transmission number, the 0th element is the version number of the first transmission, the 1st element is the version number of the first retransmission data, and the 2nd element is The version number of the second retransmission data, and the third element is the version number of the third retransmission data. In this example, R _sb =14, N _cb =1344, r ₀ =0, at this time, when the first data is transmitted, st ₀ = 28, and the corresponding retransmission data are st ₁ =700, st ₂ = 364, st, respectively. ₃ =1036.

4. Send d=10 data packets after the bit selection, the number of bits is 864 bits, and each data packet includes 1 rate-matched Turbo coding block, wherein the start index position of the bit selection in rate matching Is 28. Performing constellation modulation on the first transmission data (d=10 packets) according to a modulation mode of 16QAM (ie, modulation order M=4), and transmitting the modulation to the in-vehicle system 701 After the data stream.

After the base station 700 transmits the first transmission data to the in-vehicle system 701, it receives the feedback information of the in-vehicle system 701. If the feedback information indicates that the data is received incorrectly, the following steps are performed:

1. Performing check coding on a set of bits consisting of d=10 bits of the same index of all d=10 packets in the original packet (check encoding in this example adopts single parity encoding, ie, e=1), n=1308 check sets each having a length of e=1 bits. Since the check set has only 1 bit at this time, the n=1308 check sets constitute the 0th sub-check packet, and 1 sub-check packet is obtained. P0, the check packet is composed of e=1 sub-check packets. It can also be expressed as follows: the check packet can be expressed as p0=a0⊕a1⊕...⊕a(d-1), where p0 is a check packet, and a0, a1, ..., a(d-1) are the original packets. Medium d packets. At this time, each packet in the original packet contains only one Turbo coded block, and the check packet contains only one sub-check packet, wherein the system bits and check bits in the original packet 800, and the system in the check packet 801 The bit and check bits are respectively as shown in FIG. 8. The first data set is a bit set including a check packet system bit and a check bit (all bits of the check packet), and the second data set includes the original packet system bit and The set of bits of the check bits (all bits of the original packet).

2. According to the feedback information, determine the number of retransmitted data bits; wherein the feedback information includes at least three states (ACK, NACK1, NACK2), if the reception is ACK, it indicates correct reception; if the reception is NACK1, it indicates incorrect reception, i The number of bits of the secondary retransmission data is 864×i, i=1, 2, 3; if the reception is NACK2, the error reception is indicated, and the number of bits of the i-th retransmission data is 8640.

3. According to the number of retransmitted data bits, select one of the following methods to obtain the retransmitted data: a, the retransmitted data is selected from the first data set; b, the retransmitted data is selected from the second data set . In the i-th retransmission data, the preset positive integer N0 is equal to t=i times the number of data packet bits in the first transmission data, i=1, 2, 3, and the number of data packet bits in the first transmission data is 864, so Corresponding to the 1st (or 2 or 3) retransmission data, N0 is equal to 864 (or 864 × 2 or 864 × 3). If the number of retransmitted data bits is less than or equal to N0, mode a is selected, and if the number of retransmitted data bits is greater than N0, mode b is selected. If the number of bits of the retransmitted data is 8640, and the selection is made from the second data set, the number of bits of each selected data packet is 864, that is, 864 bits are selected for each turbo code, and the retransmission is performed. The version number is selected.

According to the retransmission data method described above, the modulation mode of each transmission data is 16QAM (modulation order is 4), and the system normalized throughput under AWGN (additive white Gaussian noise) channel. The performance comparison is shown in FIG. 9. It can be seen that the transmission processing method can obtain a large throughput gain, and the first retransmission 900 has a signal-to-noise ratio (SNR) of 1.1 dB. In the second retransmission 901, there is about 0.9dB of signal-to-noise ratio gain, and in the third retransmission 902, there is about 0.6dB of signal-to-noise ratio gain. This method has great innovation. The gain mainly comes from two aspects. The first aspect is that the retransmission data contains a bit set of a check packet with a small number of bits, and the resource occupancy is small. The second aspect is the coding gain brought by the packet coding method, and multiple data are used. The packets are linked by a packet coding method to form a large channel coding block, so that the error rate performance of the source data packet is greatly reduced.

Both the present example and the Turbo coding method used in the following examples employ the coding method specified in the LTE standard. The encoding process is as follows:

In the LTE system, the Turbo coding scheme uses Parallel Concatenated Convolutional Code (PCCC), which uses two 8-state sub-encoders and one Turbo intra-code interleaver. The code rate of the Turbo encoder is 1/3, and the transfer function of the 8-state sub-encoder in PCCC is: G(D)=[1, g ₁ (D)/g ₀ (D)], g ₀ (D)= 1+D ² +D ³ , g ₁ (D)=1+D+D ³ , when the encoding is started, the initial value of the shift register in the 8-state sub-encoder is 0, and the encoding structure is as shown in FIG. The Turbo encoder output is:

Where k = 0, 1, 2, ..., K-1.

The bits input to the Turbo encoder are denoted as c ₀ , c ₁ , c ₂ , c ₃ , ..., c _K-1 , and the output bits of the first and second 8-state sub-encoders are z ₀ , z ₁ , respectively. z ₂ , z ₃ , ..., z _K-1 and z' ₀ , z' ₁ , z' ₂ , z' ₃ , ..., z' _K-1 . The output bits from the Turbo intra-code interleaver are denoted as c' ₀ , c' ₁ , ..., c' _K-1 , which will be input to the second 8-state sub-encoder.

The forced-zero processing of Turbo coding is accomplished by obtaining the tail bits from the shift register feedback after all information bit encoding, and the tail bits are added after the information bit encoding. The first three tail codes are used to terminate the first encoder, at which point the second sub-encoder is disabled. The last three tail bits are used to terminate the second sub-encoder, at which point the first sub-encoder is disabled. Then, the transmission bits used for the grid termination scheme are:

In the Turbo intra-code interleaver, the bits input into the Turbo code interleaver are denoted as c ₀ , c ₁ , ..., c _K-1 , where K is the number of input bits. The output of the Turbo code interleaver is denoted as c' ₀ , c' ₁ , ..., c' _K-1 . The relationship between the input and output bits is as follows: c' _i = c _{Π (i)} , i = 0, 1, ..., (K-1). Wherein, the relationship between the output sequence number i and the input sequence number Π(i) satisfies the following secondary form, namely: Π(i)=(f ₁ ·i+f ₂ ·i ² )modK, Π(i)=(f ₁ · i+f ₂ ·i ² )modK. The parameters f ₁ and f ₂ depend on the block size K.

The rate matching of the codeword bit sequence output by Turbo coding is as shown in FIG. 11. The rate matching process of the turbo coded transmission channel is as follows: first, three information bit streams are used.

and

The interleaving is performed separately, followed by bit collection, followed by the generation of the circular buffer, and finally the bit selection to obtain the transmitted bit sequence e _k .

Bit stream

Interleaving according to a specific sub-block interleaver, the corresponding output sequences are respectively defined as

The sub-block interleaver of each bit stream is uniformly defined as follows:

Indicates the input bit of the sub-block interleaver corresponding to the ith output sequence, D is the number of bits, i=0, 1, 2. The output bit sequence generation process of the sub-block interleaver is:

1), order

For the number of columns in the matrix, the serial number of each column of the matrix is from left to right.

2), the number of rows of the matrix

To satisfy the smallest integer of the following formula:

Each row of the matrix has a serial number from top to bottom.

3) If

Then add in the header

Virtual bits such that y _k =<NULL>, k=0,1,...,N _D -1. then,

From matrix

The 0th row and 0th column positions start writing the bit sequence y _k line by line (writing from bit y ₀ ).

for

with

Follow 4 and 5.

4), based on the table shown in the table below

The mode of the inter-column permutation of the matrix, where P(j) represents the original column position of the j-th transform column. After inter-column replacement

The dimension matrix is:

5), the output of the sub-block interleaver is after the column transformation

A sequence of bits read out column by column in a dimensional matrix. The output bits of the sub-block interleaving are expressed as

among them,

Corresponding to y _P(0)

Corresponding to

And

for

Press 6 to proceed.

6), use

Represents the output of the sub-block interleaver, where

Simultaneously

The definition of the replacement mode P is shown in the following table:

Collection of bits, corresponding to Turbo coding block length is _K _w = 3K Π generate the circular buffer as follows:

For k=0,...,K _Π -1;

For k=0,...,K _Π -1. The w _k is the encoded Turbo coded block obtained after Turbo coding, and the rate matching is performed in the w _k .

In bit selection, the number of lines interleaved according to the transmission version number rv _idx and sub-blocks

The bit length N _{cb of the} Turbo coded block soft buffer determines the start bit of the bit selection:

The selection starts from the k0th bit, and the padding bits are ignored.

Example 2

The difference between this example and the example 1 is that the number of bits of the retransmitted data is different. When the base station 700 sends the first transmission data to the in-vehicle system 701, the feedback information of the in-vehicle system 701 is received, if the feedback letter The information indicates a data reception error, and the data hybrid retransmission method includes the following:

Determining the number of retransmitted data bits, wherein the number of retransmitted data bits is equal to a product of a modulation order and a preset resource number, and the modulation mode set by the system is 16QAM (modulation order M=4), and the data is retransmitted. The system preset resource is 1500 constellation symbols, that is, the number of bits for retransmitting data can be calculated to be equal to 6000;

According to the number of retransmitted data bits 6000, the retransmission data is obtained by performing bit selection from the first data set and the second data set. Since each data packet (Turbo coding block) in the original packet in the first transmission data has been transmitted 864 bits, in order to make the number of bits of each data packet and the verification packet in the original packet in the retransmission data substantially equal (per copy The difference between the total number of transmission bits in the data packet and the verification packet is within 5 bits, and the total number of transmission bits refers to all transmitted bits, including the first transmission data and the retransmission data, and then from the first data set In the middle, 864 bits are selected, and the remaining number of bits is equally distributed by d=10 packets and one parity packet, that is, the number of bits of the 10 packets after rate matching in the retransmitted data is calculated as follows: there is d ₁ =10 The number of bits of the data packet is N ₁ = 707, and the number of bits of the dd ₁ =0 packet is N ₁ -1 = 706.

d ₁ = mod(Nn, N ₁ -1)=10, and the number of bits of the parity packet in the retransmission data is Nd ₁ ×N ₁ -(dd ₁ )×(N ₁ -1)=1570, where N is the number of retransmitted data bits 6000, where n is the number of bits 864 of any one of the first data, and the number of bits is 6,000 bits from the first data set and the second data set according to the number of bits. Retransmit data. The starting bit index position of the bit selection may be the number of lines interleaved by the transmission version number rv _idx and the sub-block

The bit length N _{cb of the} Turbo coded block soft buffer is determined. The method is as described in Example 1, and will not be described here; or the bit selection may be performed in a sequential manner, for example, if the last selected index position is y, then The start bit index position of this bit selection is y+1, and when the tail bit is selected from the data, the selection is continued from the first bit until the required number of bits is collected.

By performing 16QAM modulation on the 6000 bit retransmission data of the above bit selection output, 1500 constellation modulation symbols can be obtained, and the modulated constellation symbols are transmitted.

Example 3

The present example differs from the example 1 in that the definition of the first data set is different, the first data set includes all bits of the check packet, and the second data set includes only all check bits of the original packet. The number of bits of retransmitted data is the same as that of instance 1, and bit selection is looped in a sequential manner. select.

Or the first data set includes all system bits of the check packet, and the second data set includes a check bit of the original packet and a check bit of the check packet, where the preset positive integer N0 is equal to the check packet. i times the number of systematic bits 432, where i is the number of retransmissions, and if it is the 1st (or 2 or 3) retransmissions, i = 1 (or 2 or 3). If the number of bits of the first retransmission data is 432, 432 bits are selected from the first data set. Since the first data set only contains the check packet system bits and the number of bits is exactly equal to 432 bits, the bit selection is 432. The bit is all bits in all the first data sets; if the number of bits of the second retransmission data is 600 (the value may be preset by the system, or indicated by the receiving end feedback information, or determined by the allocatable resources), The value is less than 432×2, so the selection is still made from the first data set; the other analogy operations can obtain the retransmitted data of the corresponding bits.

Alternatively, the first data set includes all system bits of the check packet, and the second data set includes all bits of the original packet. Alternatively, the first data set includes all system bits of the check packet, and the second data set includes check bits of the original packet. The bit selection method is similar to the method described above, and details are not described herein again.

Example 4

According to an aspect of the present application, a wireless data communication system is applicable to a User Equipment (UE) or a base station. The user equipment includes: a mobile device, an access terminal, a user terminal, a subscriber station, a subscriber unit, a mobile station, a remote station, a remote terminal, a user agent, a user equipment, a user equipment, or some other terminology, and the user equipment is used to The base station transmits data, and also includes communication between UEs in the Internet of Things and the like. The user equipment may also be a mobile phone, a car, a tablet, various sensing nodes, and the like. The base station includes an access point (AP), or may be referred to as a Node B, a Radio Network Controller (RNC), an Evolved Node B (eNB), a Base Station Controller (BSC), and a base station. Transceiver Station (BTS), Base Station (BS), Transceiver Function (TF), Radio Router, Radio Transceiver, Basic Service Unit (BSS), Extended Service Unit (ESS), Radio Base Station (RBS), or some other terminology .

According to an aspect of the application, a data hybrid retransmission processing method is provided for a receiving end, which receives the transmission data as described in Example 1, and according to the data sent by the transmitting end in the example 1, the receiving end of the present example (the vehicle system) ) Perform receiving processing.

The method for receiving the first transmission data includes: receiving 2160 constellation symbols of the first transmission data, performing constellation demodulation on the 2160 symbols to obtain 8640 soft information (log likelihood ratio information); performing the bit selection method according to the example 1 The reverse operation is to perform de-rate matching on the 8640 pieces of soft information to obtain 10 pieces of Turbo coded block soft information, and the number of soft information per copy is 1308, wherein the soft information of the selected bit position is set to 0; Decoding the 10 pieces of Turbo coded block soft information after the rate matching, and decoding the decoding result by at least one of a cyclic redundancy check sequence (CRC sequence) and a Turbo code word space (the decision method is not limited to the above) The method), if all decoding results are correct, feeding back information to the transmitting end to indicate correct reception; if the decoding result is wrong, when the ratio of the number of Turbo code errors to the total number of Turbo code blocks is less than or equal to T, then NACK1 is fed back. Indicates to retransmit 864 bits of retransmission data, and when the ratio of the number of Turbo code errors to the total number of Turbo code blocks is greater than T, then NACK2 is fed back, indicating retransmission of 8640 bits of retransmission Data, wherein said predetermined threshold value T is a real number greater than 0 and less than 1, in the present example, T is equal to 0.9.

The receiving retransmission data processing method includes: receiving a corresponding number of constellation symbols of the retransmitted data, demodulating the constellation symbols to obtain a corresponding soft information sequence; performing the reverse operation according to the retransmission data bit selection method described in Embodiment 1, If there are only 864 soft information check packet bit sequences, the de-rate matching results in a check packet having a soft information number of 1308. If the retransmitted data includes bit data in the original packet, the de-rate matching Obtaining soft information of the Turbo code block in the corresponding original packet, wherein the soft information of the selected bit position is set to 0; combining the previously received and currently received soft information of the original packet and the check packet that have been matched by the de-rate Information, for example, if the current reception is the second retransmission of data, the soft information of the jth turbo coded block is:

among them,

Is the jth turbo coded block soft information in the i-th retransmission data, LLR _j is the soft data of the jth turbo code block after the soft data is merged, j=0, 1, ..., 9, and the check packet soft The data is also obtained by combining the same processing method; then the 10 pieces of the de-rate matched Turbo coded block soft information and the check packet soft information are decoded to obtain the source data packet, since the check packet is all Turbo coded blocks. XOR result (single parity coding), so the verification packet also belongs to the Turbo codeword space, and can also perform Turbo decoding, and the decoding method can be performed by the following steps (iteration method) 1. First, Turbo decoding is performed on d=10 copies of Turbo coded block soft information and check packet soft information; 2. Determining Turbo decoding, retaining decoding error Turbo coded block soft information, if the decoding is correct or When the maximum number of iterations is reached (maximum of 5 times), the iteration is exited; 3. The soft coding information of the decoded error Turbo coding block is corrected by packet coding and decoding, and the first step is returned; and the cyclic redundancy check sequence (CRC sequence) is adopted. And at least one of the Turbo codeword spaces The decoding result is judged (the decision method is not limited to the above method), if all Turbo codes are decoded correctly, the information ACK is fed back to the transmitting end to indicate correct reception; if the decoding result is wrong, when the number of Turbo codes is wrong and the total Turbo When the ratio of the number of code blocks is less than or equal to T, NACK1 is fed back to indicate retransmission of 864 bits of retransmission data, and when the ratio of the number of Turbo codes to the total number of Turbo code blocks is greater than T, NACK2 is fed back to indicate retransmission. 8640 bits of retransmission data, wherein the predetermined threshold T is a real number greater than 0 and less than 1, in this example, T is equal to 0.9.

Example 5

According to an aspect of the present application, in an LTE mobile communication system or a future fifth generation mobile communication system, a data transmission direction is a base station transmitting data (downlink transmission service data) to a mobile user, or a data transmission direction is a mobile user transmitting data to a base station. (Upstream transmission service data). The mobile user includes: a mobile device, an access terminal, a user terminal, a subscriber station, a subscriber unit, a mobile station, a remote station, a remote terminal, a user agent, a user device, a user equipment, or some other terminology. The base station includes an access point (AP), or may be referred to as a Node B, a Radio Network Controller (RNC), an Evolved Node B (eNB), a Base Station Controller (BSC), and a base station. Transceiver Station (BTS), Base Station (BS), Transceiver Function (TF), Radio Router, Radio Transceiver, Basic Service Unit (BSS), Extended Service Unit (ESS), Radio Base Station (RBS), or some other terminology .

According to an aspect of the present application, a data hybrid retransmission processing method is provided for a receiving end to receive transmission data sent by a transmitting end as follows: the number of bits of the source data packet is 16000, and the number of bits is divided into 16 bits. For a 1000-bit sub-block, a CRC sequence with a bit number of 8 bits is added for each sub-block, and the sub-block is 1 packet after every 2 CRC sequences are added, so there are 8 packets in total, for 8 copies. All the sub-blocks after adding the CRC sequence in the data packet are Turbo-coded to obtain a number of encoded 30-bit Turbo coded blocks. The number of bits per packet is 6072, and the number of bits including 2 bits is the encoded turbo code block. The turbo coding is the same as the coding method in the first embodiment, and the 8 packets of the number of bits of 6072 constitute the original packet; the 16-coded turbo coded block is bit-selected to obtain a rate of 3/4. The matched Turbo coding block, that is, the number of bits of the turbo code block after matching each code rate is 1344, and it is also known that the number of bits per transmitted data packet is 1344×2=2688, and the number of first transmissions The total number of bits is 1344 × 16 = 21504, using the modulation scheme is QPSK (Quadrature Phase Shift Keying) modulation order equal to 2, the number of modulation symbols of the constellation 10752. If the bit selection is performed according to the retransmission version number, as described in Example 1, the method of determining the start bit of each data transmission according to the parameters such as the retransmission version number, in this example, when the data is first transmitted, st ₀ = 63, such as a start bit 1603 shown in FIG. 16(a), wherein each Turbo coded block shown in FIG. 16(a) has undergone sub-block interleaving and bit-harvesting obtained codewords; and corresponding to the first, second, and third The bit selection start index positions of the secondary retransmission data are st ₁ =1599, st ₂ = 831, and st ₃ = 2367, respectively. If the sequential bit selection mode is used, the bit selection start index position of the turbo matched block after the rate matching in the 0th (first) transmission data is 0, as shown in FIG. 17(a); in the first transmission data. The bit matching start index position of the rate matched Turbo coded block is equal to the 0th index position value plus 1 and the total number of bits of the Turbo coded block is 3036 (the starting index position value is less than 3036); the second time The bit selection start index position of the rate-matched Turbo coded block in the transmission data is equal to the first index position value plus one, and the total number of bits of the turbo code block is 3036; the rate is matched in the third transmission data. The bit selection start index position of the turbo code block is equal to the second index position value plus one, and the total number of bits of the turbo code block is 3036.

According to the above-mentioned transmission data, the present embodiment provides a data hybrid retransmission processing method, which is used for the data receiving side (the mobile user in the downlink and the base station in the uplink), and includes the following steps:

1, receiving the transmission data of the transmitting end; demodulating the received 10752 constellation symbols, obtaining 21504 soft information values (log likelihood ratio), and dividing into 16 soft information blocks each having a number of 1344 (8 soft sections) The data packet, each soft data packet includes 2 soft information blocks, and is subjected to de-rate matching to obtain a corresponding Turbo code soft data block.

2, decoding the received transmission data; performing Turbo decoding on the 16 soft information blocks after the de-rate matching, obtaining 16 decoding information blocks, that is, obtaining 8 decoding data packets, each of the decoding data packets There are 2 decoding blocks in the middle.

3. At least one of the CRC sequence and whether it belongs to the Turbo code code word space The correctness of the received 8 decoded data packets. If the decoding result is incorrect, sending feedback information to the transmitting end, determining the number of retransmitted data bits from the feedback information and the first transmission data, and selecting one of the following manners to obtain the retransmitted data: a, the retransmitted data from Selecting from the first data set; b, the retransmitted data is selected from at least one of the second data set and the first data set; wherein the first data set is a bit set including at least a check packet system bit, The second data set is a bit set including at least an original packet check bit, and the original packet includes a plurality of data packets, and the check packet is obtained by performing packet coding on the original packet.

In the packet coding, if the check code adopts a single parity check code, that is, the check packet includes only one sub-check packet. That is, the check packet can be expressed as P0=S0⊕S1⊕...⊕S7, where P0 is a check packet, S0, S1, ..., S7 is d=8 packets in the original packet, each data The number of bits in the packet is 6072, including 2 copies of Turbo coded blocks. As shown in FIG. 15, the systematic bits of the check packet 1501 are obtained by single parity check coding of system bits of 8 data packets (S0, S1, ..., S7), and the check bits of the check packet 1501 are composed of 8 data. The check bits of the packet (S0, S1, ..., S7) 1500 are obtained by single parity coding, and the systematic bits of each data packet are composed of systematic bits of all Turbo coding blocks belonging to the data packet, and the original packet system bits It is a systematic bit structure of all data packets, and the check bits of each data packet are composed of parity bits of all Turbo coded blocks belonging to the data packet, and the original packet check bits are composed of check bits of all data packets.

In step 3, if the received transmission data error block rate is greater than T(i-1) and less than Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; where Ti is a preset threshold set The i-th element, and 0<T(i-1)<Ti,i=[2,3,4], the feedback information i is the i-th element in the feedback information set, and Di is the number of preset retransmission data bits The i-th element in the set, Di is an integer greater than 0, and D(i-1)<Di; the received transmission data error block rate is the number of error blocks in the received transmission data and the reception The ratio of the number of all code blocks in the transmitted data. In this example, the preset threshold set is [0 0.2 0.4 0.7 1], the feedback information set is [ACK, NACK0, NACK1, NACK2, NACK3], and the preset retransmission data bit number set is [0, 2688, 8000, 16000, 21504]. If the received transmission data error block rate is equal to T0 (ie, equal to 0), feedback information 0 (ie, ACK) is sent, indicating that the number of retransmitted data bits is equal to D0 (ie, equal to 0).

In step 3, if the received transmission data is correct, feedback information 0 (ACK) indicates correct reception; if the received error rate of the received transmission data is greater than 0 and less than T, the transmission is reversed. Feeding information 1 (NACK1), indicating that the number of retransmitted data bits is equal to the number of data packet bits in the first transmission data, that is, equal to 2688; if the error block rate of the received transmission data is greater than or equal to T, sending feedback Information 2 (NACK2), indicating that the number of retransmitted data bits is equal to the number of bits of the first transmission data, that is, equal to 21504; wherein, T=0.9, the error block rate is the number of erroneous Turbo code blocks in the received transmission data and the The ratio of the number of all Turbo code blocks (equal to 16) in the transmitted data is received.

Alternatively, in step 3, the method may include: if the received transmission data is correct, feedback information 0 (ACK), indicating correct reception; if the received transmission data has an error block rate greater than 0 and less than T0 Sending feedback information 1 (NACK1), indicating that the number of retransmitted data bits is equal to the number of data packet bits in the first transmission data, that is, equal to 2688; if the error block rate of the received transmission data is greater than or equal to T0 and Less than T1, sending feedback signal 2 (NACK2), indicating that the number of retransmitted data bits is equal to Q0=15000; if the error block rate of the received transmission data is greater than or equal to T1, sending feedback information 3 (NACK3), indicating retransmission The number of data bits is equal to the number of bits of the first transmission data, that is, equal to 21504; wherein, T0=0.3, T1=0.6, the error block rate is the number of error Turbo code blocks in the received transmission data and the number of all Turbo code blocks (equal to 16) ratio.

Example 6

The difference between this example and the examples 1 to 5 lies in the channel coding method, and the channel coding method used is LDPC coding, or Polar coding, or convolutional coding.

The full name of the LDPC code is Low Density Parity Check Code (LDPC), which is a linear block code with a sparse check matrix proposed by Dr. Robert G. Gallage in 1963, which not only approximates Shannon. Limited performance, low decoding complexity, flexible structure, has been widely used in deep space communications, fiber-optic communications, satellite digital video and audio broadcasting. The structured LDPC code is defined by a parity check matrix H of size (mb x z) x (nb x z), wherein the parity check matrix H is a base matrix Hb of size mb x nb, a spreading factor z and The basic permutation matrix P is determined by three variables. The information sequence length k = (nb - mb) × z, the code word length n = nb × z, and the code rate r = k / n. The hb _ij power matrix of all elements in the base matrix Hb is replaced by a full 0 square matrix or a basic permutation matrix P to obtain an expanded parity check matrix H, where hb _ij is an element in Hb. The basic matrix Hb is defined as follows.

The expanded parity check matrix H is defined as follows.

Where, if hb _ij is equal to -1, then

Is a z×z all-zero matrix, otherwise it is a hb _ij power matrix of the basic permutation matrix P, and the basic permutation matrix P is defined as follows.

The LDPC code introduced above is a code on a binary field, and also includes LDPC coding of a multi-domain, assuming an LDCP code constructed on a domain GF(2) (binary domain) and a domain GF(q) (q= ^2p ) The corresponding check matrices are H ₂ and H _{q , respectively} . The element in H ₂ is 0 or 1, and H _q is composed of

elements

0, 1, ..., q-1, and each element in H _q is a synthesis of p elements in H ₂ . If a value a on the field GF(q)(q=2 ^p ) is associated with a 1×p binary vector, then this vector is substituted into H _q to obtain a binary representation of H _q . Compared with the binary domain LDPC code, the bipartite graph structure of the multi-domain LDPC does not change, and does not cause an increase in the number of short circles between nodes, so that the decoding performance is significantly improved. This coding structure on the multi-domain will increase the decoding complexity, but this increase is worthwhile relative to the improvement in decoding performance. The decoding algorithm of the LDPC code includes the following three categories: hard decision decoding, soft decision decoding, and hybrid decoding. The hard decision decoding first performs a hard decision on the received real sequence, and finally sends the obtained hard decision sequence to the hard decision decoder for decoding. Soft decision decoding can make full use of the received channel information (soft information), and the channel information utilization rate is greatly improved, and excellent error performance can be obtained. Hybrid decoding combines the features of soft decision decoding and hard decision decoding.

The Polar Code has a definite construction method and is the first and only known channel coding method that can be rigorously proven to "reach" the channel capacity. For N = 2 ⁿ independent binary input channels W, where n is a natural number. A so-called channel combining operation and a channel division operation are performed to obtain N pre-dependent polarization channels. Compared with the originally unpolarized channel, these polarized channels exhibit polarization when the capacity and the capacity remain unchanged: the capacity of one part of the channel increases, and the capacity of the other part decreases. Moreover, it has been theoretically proved that when a polarization operation is performed close to an infinite number of channels, that is, when N tends to infinity, the capacity of a part of channels will tend to be 1, and the capacity of the remaining channels will tend to be zero, and at the same time, the capacity is The ratio of the channel of 1 to the total number of channels is exactly the capacity of the original binary input discrete channel. This phenomenon is called Channel Polarization. On the basis of channel polarization, it is only necessary to transmit the free bits of the bearer information on a part of the channel whose capacity is 1, and transmit to the transceiver on the channel where the remaining capacity tends to 1 and the channel whose capacity tends to 0. Always fixed bits. The number of channels used to transmit the free bits is denoted by K, thereby forming a one-to-one mapping relationship from K information bits to N transmission bits, which is polarization coding. At the decoding end, according to the dependence between each bit introduced when the channel is polarized, an algorithm called serial cancellation (SC) is used for decoding, and the coding and decoding complexity is O(NlogN). The Polar code used in this example is: if a sequence of information with a number of bits K0 is transmitted in one channel, only K0 with the smallest error probability value need to be selected from the N0 polarized channels for transmitting the information sequence, This part of the polarized channel is called the information channel, and the remaining channels transmit some fixed sequences agreed by the receiving end and the transmitting end. The fixed sequence is often set to an all-zero sequence, and the partial channel is called a fixed channel. After the fixed channel of the information channel and the fixed sequence is determined, since the number of information sequences is K0, and the N0 information is actually transmitted through the N0 time slots of the channel, it can be regarded as a mapping from the K0 dimensional space to the N0 dimensional space. The mapping is polarization coding, and the code rate is R0=K0/N0. In the polarization code, the polarization code system bit refers to: K0 bits in the polarization coded block of all N0 bits after encoding. Wherein the K0 bit is a sequence K0 bit starting from the R1 bit, and if the tail bit is less than K0 bits, continuing from the first bit order, where R1 is an integer greater than or equal to 0; or the polarization coding The N0 bits of the block are arranged in a large to small order according to the magnitude of the influence degree, and the first K0 bit is a system bit, and the influence degree refers to a J bit associated with the ith bit in the polarization coded block, as shown in the figure. An example of polarization coding is shown at 20, if the code rate is 1/2, then the input is from the input.

The 4 inputs with the highest reliability are selected as the information sequence, and the output polarization coding block is 8 bits x ₁ to x ₈ , and the influence degree of the first bit x ₁ in the output polarization coding block is 8, and the influence of x ₂ The degree of the degree is 4, and the degree of influence of the last 6 bits x ₃ to x ₈ of the polarization coding block is [4 2 4 2 2 1], respectively, then the system bits in the polarization coding block are [x ₁ , x ₂ , x ₃ , x ₅ ], the polarization coded input port is

In the encoding process of the convolutional code, the input information bits are group coded, and the coded output bits of each code group are related not only to the information bits of the packet but also to the information bits of other packets at the previous time. And, in the decoding process of the convolutional code, not only the decoding information can be obtained from the packet received at the current time, but also the related information is extracted from the previously associated packets. It is precisely because the correlation of each group is fully utilized in the encoding process of the convolutional code that the convolutional code has a fairly good performance gain. In this example, the convolutional code adopts a tail-biting convolutional coding method defined in the LTE system, and the tail-biting convolutional code with a constraint length of 7 and a code rate of 1/3 is as shown in FIG. The initial value of the encoder's shift register is set to the value corresponding to the last 6 information bits of the input stream, so that the initial and final states of the shift register are the same. Therefore, s ₀ , s ₁ , s ₂ , ..., s ₅ represent the shift register of the encoder, then the initial value of the shift register is set to: s _i = c _(K-1-i) . Encoder output stream

with

Corresponding to the first, second and third check data streams respectively. The three data streams are also interleaved by a sub-code block interleaver and then collected by bits. The packet coding method in this example is performed after bit collection, and a check packet of the corresponding number of bits is obtained.

Example 7

According to an aspect of the present application, the present disclosure provides a data transmission processing method for a transmitting end, and the processed source data packet is as follows: the number of bits of the source data packet is 3968, and the number of CRC sequence bits is I=16 bits, and the modulation mode For QPSK, the modulation order is 2 and the code rate is 1/2. Processing steps Includes the following:

1. Segmenting the source data packet to obtain H1=8 partial data blocks, and the number of bits of each sub-block is 496 bits;

2. Adding a CRC sequence of length I=16 bits to the H1=8 sub-blocks, and obtaining a sub-block after adding a CRC sequence with a bit number of 512;

3. Performing polarization coding on the H1=8 sub-blocks after adding the CRC sequence to obtain H1=8 copies of the polarization coding block;

4. Perform packet coding on all bits or partial bits of the H1=8 partial polarization coding block to obtain an H2=1 partial sub-check packet, the H1=8-part polarization coding block and the H2=1 sub-check The package constitutes the first pass data.

A length of N = 1024 [mu] _N vector generated after the Polar matrix code encoding G _N to get a length-N vector x _N:

x _N =μ _N G _N

Wherein, the generator matrix G _N satisfies the following formula:

F is the Kronecker F ₂ n-th power, and F ₂ is given by the formula:

And B _N is a bit flip permutation matrix. if

Then the element

It is equal to the element μ _bn...b2b1 , where b1, . . . , bn is 0 or 1, b1b2...bn, and bn...b2b1 are subscripts of binary numbers. The encoding process obtains the reliability value of 1024 inputs according to the polarization decomposition (Gaussian approximation algorithm) of the channel parameters according to the output bits (less than or equal to 1024), and selects the highest 512 input from the vector μ _N according to the reliability level. After adding 512 bits of the sub-block after the CRC sequence, a set of 1024-bit output bits, that is, a polarization coded block, can be obtained.

In this example, in step 4, the first 512 bits of the H1=8 copies of the polarization coding block (ie, equal to the number of systematic bits, ie, the number of sub-block bits plus the number of CRC sequence bits) are packet-encoded to obtain H2= 1 sub-check packet with a bit number of 512 bits, P0=S'0⊕S'1⊕...⊕S'7, S'0 to S'7 correspond to the first 512 bits in the polarization coding blocks S0 to S7, respectively. Since the check packet length is 512 bits, the number of bits per polarization coded block is 1024-512/8=960 bits in order to make the total transmission data code rate equal to 1/2. In the polarization coding process, it is determined that the first 64 output ports are unused ports, and the reliability of each input port is calculated by channel polarization on the rear 960 output port, sorted according to the reliability, and then each CRC is added. The sub-blocks are input to the corresponding input ports, and the corresponding polarization coding block is obtained, and the number of bits is 960. Packet coding facilitates the association of all polarization coding blocks, which can be decoded or iteratively decoded at the receiving end. Each polarization coding block can be updated with information of other coding blocks, which can greatly obtain coding. Gain, that is, using a simple coding method to construct a short code block into a channel coding block, thereby obtaining a code length gain, and because of a simple XOR relationship, the decoding complexity of the receiving end is not large.

The polarization coded H1=8 pieces of the polarization coded block with the number of bits of 960 and the check packet of the H2=1 part of the number of bits constitute 512, and the number of bits of the first pass data is 8192, It performs QPSK modulation to obtain 4096 constellation symbols, and transmits the 4096 constellation symbols.

Through the above embodiments and examples, the throughput performance of the communication system is improved, thereby improving the reception robustness of the communication system, and the performance is superior to the conventional data coding scheme.

In addition, the embodiment of the present application further provides a terminal, including a processor and a machine readable medium, where the machine readable medium stores an instruction, and when the instruction is executed by the processor, the data transmission on the transmitting end side is implemented. Approach.

In addition, the embodiment of the present application further provides a terminal, including a processor and a machine readable medium, where the machine readable medium stores an instruction, and when the instruction is executed by the processor, the data transmission on the receiving end side is implemented. Approach.

In addition, the embodiment of the present application further provides a machine readable medium storing instructions for implementing the data transmission processing method on the transmitting end side when the instruction is executed by the processor.

In addition, the embodiment of the present application further provides a machine readable medium storing instructions for implementing the data transmission processing method on the receiving end side when the instruction is executed by the processor.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one A function or step can be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a machine-readable medium, such as a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above description is only an exemplary embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Industrial applicability

The embodiment of the present application provides a data transmission processing method and apparatus, which can improve system throughput and enhance robustness of data transmission.

Claims

A data transmission processing method for a transmitting end, comprising:

Receiving feedback information of the receiving end, according to the feedback information, performing data processing in one of the following ways:

The first method comprises: dividing a next source data packet to obtain a plurality of sub-blocks, adding a cyclic redundancy check CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence respectively An original packet consisting of a plurality of channel coding blocks, performing packet coding on the original packet to obtain a verification packet, performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data corresponding to the source data packet;

Manner 2: determining a number of retransmitted data bits, selecting the retransmitted data from the first data set according to the number of retransmitted data bits, or selecting the retransmitted data from the first data set and the second data set; The first data set includes at least a bit set of a check packet system bit; the second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, the check The packet is obtained by packet encoding the original packet.
The method of claim 1, wherein if the feedback information indicates a reception error, processing is performed in a second manner.
The method of claim 2, wherein the retransmission data is selected from the first data set when the number of retransmitted data bits is less than or equal to N0; wherein N0 is a positive integer.
The method of claim 1, wherein said performing packet encoding on said original packet to obtain a verification packet comprises:

Performing check coding on a bit set formed by E bits of the same index of the E packets included in the original packet, and obtaining n check sets having a length of e bits, where the index in the n check sets is i n bits constitute an ith sub-check packet, i=0, 1, ..., (e-1), obtain an e-sub-check packet, the check packet includes the e-sub-check packet, where E is The number of data packets in the original packet, n is the number of data packet bits in the original packet, and e is an integer greater than 0, and the check coding adopts one of the following coding modes: single parity coding, BCH coding, RM coding, RS coding.
The method of claim 4, wherein when the check code employs a single parity code, the check packet includes 1 sub-check packet.
The method of claim 1 wherein said first set of data comprises one of: verifying all bits of the packet, all system bits of the check packet.
The method of claim 1 wherein said second set of data comprises one of: all check bits of the original packet, all bits of the original packet, all check bits of the original packet, and all of the check packets Check the bit.
The method of claim 3, wherein said N0 is T times the number of bits of any one of the header data or T times the number of bits of any one of the check packets in the check packet, wherein T is positive Integer.
The method of claim 1, wherein when the number of retransmitted data bits is greater than N0, the retransmitted data is selected from the first data set and the second data set, and the retransmitted data is determined according to at least one of the following: The number of bits per sub-check packet and the number of bits per packet: the total number of bits of the first transmission data, the number of packets in the original packet, the number of bits of any packet in the original packet, the total number of bits of retransmitted data, Modulation order, number of retransmitted data resources; where N0 is a positive integer.
The method of claim 9, wherein the total number of bits of the plurality of sub-check packets in the retransmitted data is equal to the total number of bits of the first transmitted data and the total number of bits of all the plurality of data packets in the retransmitted data a difference value; or, equal to a difference between a product of the number of retransmitted resources and the modulation order and a total number of bits of all the plurality of data packets in the retransmitted data; or equal to a total bit of the retransmitted data The difference between the number and the total number of bits of all the plurality of packets in the retransmitted data.
The method of claim 1, wherein the number of retransmitted data bits comprises at least one of: a product of a number of retransmission resources and a modulation order; a total number of bits of the first transmission data; and a predetermined positive integer.
The method according to claim 1, wherein if the feedback information indicates erroneous reception, the number of retransmitted data bits is greater than or equal to the number of bits of any one of the first transmission data and is less than or equal to the first An integer that passes the total number of bits of data.
The method of claim 12, wherein the feedback information includes at least two error states for indicating that the number of retransmitted data bits is: a total number of bits of the first transmission data, and any one of the first transmission data. The number of bits.
The method of claim 1 wherein said determining the number of retransmitted data bits, the packet include:

Determining, according to the feedback information, a number of retransmitted data bits from a preset retransmission data bit number set, where the preset retransmission data bit number set includes a elements, and the i-1th element value is smaller than the i th element value, i =2,...,(a-1), a is an integer greater than one.
The method of claim 14, wherein in the set of preset retransmission data bits, the second element value is equal to the number of bits of any one of the first transmission data.
The method according to claim 14, wherein in the set of preset retransmission data bits, the i-th element value is equal to the i-th element value plus ΔD, wherein i=2, . . . , (a-1) , ΔD is an integer greater than one.
The method of claim 16 wherein said ΔD is equal to a positive integer power of 2 or Z times the number of bits of any one of the first pass data, wherein Z is an integer greater than zero.
The method of claim 14, wherein the set of preset retransmission data bits includes at least one element having an element value equal to zero.
The method according to claim 14, wherein in the set of preset retransmission data bits, the second element value is greater than or equal to the number of bits of any one of the first transmission data, and the tail element value is greater than or equal to The total number of bits of the first pass data.
The method of claim 1, wherein if the feedback information indicates that the data reception is correct, processing is performed in a manner of one.
The method according to any one of claims 1 to 20, wherein the original packet contains an E-packet, and the j-th packet includes a Cj-coded channel-coded block; the original packet check bit Is a check bit of all channel coding blocks in the original packet, the check packet system bits are obtained by packet coding of the original packet system bits, and the original packet system bits are system bits of all channel coding blocks in the original packet, and the check packet is corrected. The bit is the original packet check bit for packet coding; wherein E is a positive integer, j=0, 1, ..., (E-1), Cj is a positive integer; the channel coding is one of the following coding methods: turbo coding , LDPC coding, convolutional coding, Polar coding.
A data hybrid retransmission processing method for a receiving end, comprising:

Receiving transmission data of the transmitting end and decoding;

Sending feedback information to the sending end according to the decoding result, where the feedback information is used to instruct the sending end to perform data processing in one of the following manners:

The first method comprises: dividing a next source data packet to obtain a plurality of sub-blocks, adding a cyclic redundancy check CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence respectively An original packet consisting of a plurality of channel coding blocks, performing packet coding on the original packet to obtain a verification packet, performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data corresponding to the source data packet;

Manner 2: determining a number of retransmitted data bits, selecting the retransmitted data from the first data set according to the number of retransmitted data bits, or selecting the retransmitted data from the first data set and the second data set; The first data set includes at least a bit set of a check packet system bit; the second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, the check The packet is obtained by packet encoding the original packet.
The method according to claim 22, wherein, if the decoding result is incorrect, the feedback information is used to indicate that the sending end performs data processing according to mode one or mode two; if the decoding result is correct, the feedback information It is used to instruct the sending end to perform data processing according to the mode 1.
The method according to claim 22 or 23, wherein if the received transmission data error block rate is equal to 0, the feedback information 0 is sent to instruct the transmitting end to perform processing according to mode one; and the received transmission data When the error block rate is not 0, if the received transmission data error block rate is greater than T(i-1) and less than or equal to Ti, the feedback information i is sent to indicate that the number of retransmitted data bits is equal to Di; , Ti is the i-th element of the preset threshold set T, and T(i-1)<Ti, the feedback information i is the i-th element in the preset feedback information set, and Di is the preset re-transmitted data bit number set D In the i-th element, Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set T includes a elements and the first and last element values are equal to 0 and 1, respectively, and the preset feedback information set Including a element, the preset retransmission data bit number set includes a elements, a is an integer greater than 1, and the error block rate is the number of all error blocks in the received Q share transmission data and the received Q shares. The ratio of the number of all channel coding blocks in the transmitted data, where Q is a positive integer.
The method according to claim 24, wherein in the set D of preset retransmission data bits, the value of the i-th element is equal to the value of the i-th element plus ΔD, wherein i=2,..., (a-1 ), ΔD is an integer greater than one.
The method according to claim 24, wherein said second element value D1 of said preset retransmission data bit number set D is equal to the number of bits of any one of the first transmission data, D(a-1) Greater than or equal to the total number of bits of the first transmission data.
A data transmission processing device is disposed at the transmitting end, and includes:

The first receiving module is configured to receive feedback information of the receiving end;

The first data processing module includes: a dividing unit configured to segment the source data packet to obtain a plurality of sub-data blocks; and adding a unit, configured to add a cyclic redundancy check CRC sequence to the plurality of sub-data blocks respectively; the channel coding unit And configured to perform channel coding on the sub-blocks after adding the CRC sequence to obtain an original packet composed of a plurality of channel coding blocks; and a packet coding unit configured to perform packet coding on the original packet to obtain a verification packet; a bit selection unit configured to perform bit selection on the plurality of channel coding blocks and the check packet to obtain first transmission data;

Retransmitting the data processing module, comprising: a determining unit, configured to determine a number of retransmitted data bits; and a second bit selecting unit configured to select the retransmitted data from the first data set according to the number of retransmitted data bits, or Selecting the retransmission data from a first data set and a second data set; wherein the first data set includes at least a bit set of check packet system bits; and the second data set includes at least an original packet check bit a set of bits; the original packet includes a plurality of data packets, and the verification packet is obtained by packet encoding the original packet.
The apparatus according to claim 27, wherein said second bit selecting unit is further configured to select said retransmitted data from said first data set when said number of retransmitted data bits is less than or equal to N0; , N0 is a positive integer.
The apparatus according to claim 27, wherein said retransmission data processing module further comprises: a packet encoding unit; said packet encoding unit comprising: a check encoding subunit and a check packet acquiring subunit;

The check coding subunit is configured to perform check coding on a bit set formed by E bits of the same index of the E packets included in the original packet, to obtain n check sets having a length of e bits;

The check packet acquisition subunit is configured to form an i-th sub-check packet, i=0, 1, . . . , (e-1), to obtain an e-index of i in the n check sets. a verification packet, wherein the verification packet includes the e-sub-check packet, where E is the number of data packets in the original packet, and n is the original packet The number of data packet bits, e is an integer greater than 0, and the check coding adopts one of the following coding methods: single parity coding, BCH coding, RM coding, and RS coding.
The apparatus according to claim 27, wherein said second bit selecting unit is further configured to select said retransmission from said first data set and said second data set when said number of retransmitted data bits is greater than N0 Data, determining the number of bits of each sub-check packet in the retransmitted data and the number of bits per packet according to at least one of the following: the total number of bits of the first transmission data, the number of data packets in the original packet, and any data packet in the original packet The number of bits, the total number of bits of retransmitted data, the modulation order, and the number of retransmitted data resources; where N0 is a positive integer.
The apparatus according to claim 27, wherein if the feedback information of the receiving end indicates erroneous reception, the number of retransmitted data bits is greater than or equal to the number of bits of any one of the first transmission data and is less than or equal to the first An integer that passes the total number of bits of data.
The apparatus according to claim 27, wherein the second bit selecting unit further sets the number of retransmitted data bits from the preset retransmitted data bit number set according to the feedback information of the receiving end, wherein the preset retransmission data The set of bit numbers includes a elements, the first element value in the set of preset retransmission data bits is equal to 0, and the value of the i-1th element is smaller than the value of the i-th element, i=2,..., (a-1), a Is an integer greater than one.
A data transmission processing device is disposed at the receiving end, and includes:

a second receiving module, configured to receive transmission data of the transmitting end and perform decoding;

The feedback module is configured to send feedback information to the sending end according to the decoding result, where the feedback information is used to instruct the sending end to process in one of the following manners:

The first method comprises: dividing a next source data packet to obtain a plurality of sub-blocks, adding a cyclic redundancy check CRC sequence to the plurality of sub-blocks, and performing channel coding on the sub-blocks after adding the CRC sequence respectively An original packet consisting of a plurality of channel coding blocks, performing packet coding on the original packet to obtain a verification packet, performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data corresponding to the source data packet;

Manner 2: determining a number of retransmitted data bits, selecting the retransmitted data from the first data set according to the number of retransmitted data bits, or selecting the retransmitted data from the first data set and the second data set; The first data set includes at least a bit set of a check packet system bit; The second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, and the check packet is obtained by performing packet coding on the original packet.
The device of claim 33, wherein the feedback information is used to indicate that the sending end performs data processing according to mode one or mode two if the decoding result is incorrect; if the decoding result is correct, the feedback information It is used to instruct the sending end to perform data processing according to the mode 1.
The device of claim 33 or 34, wherein the feedback module is further configured to: if the received transmission data error block rate is equal to 0, send feedback information 0, to indicate that the sending end performs according to mode one Processing, when the received transmission data error block rate is not 0, if the received transmission data error block rate is greater than T(i-1) and less than or equal to Ti, sending feedback information i for indicating The number of retransmitted data bits is equal to Di; where Ti is the i-th element of the preset threshold set T, and T(i-1)<Ti, the feedback information i is the i-th element in the preset feedback information set, and Di is Presetting the ith element of the set of retransmitted data bits D, Di is an integer greater than 0, and D(i-1)<Di; the preset threshold set T includes a elements and wherein the first and last element values are respectively equal to 0 and 1, the preset feedback information set includes a elements, the preset retransmission data bit number set includes a elements, a is an integer greater than 1, and the error block rate is all errors in the Q shares received transmission data. a ratio of the number of code blocks to the number of all channel coding blocks in the Q received transmission data, where Q is a positive integer .
A data transmission processing method for a transmitting end, comprising:

Receiving feedback information of the receiving end;

Determining a number of retransmitted data bits when the feedback information at the receiving end indicates a receiving error; selecting retransmission data from the first data set according to the number of retransmitted data bits, or selecting from the first data set and the second data set Retransmitting data;

The first data set includes at least a bit set of a check packet system bit; the second data set includes at least a bit set of original packet check bits; the original packet includes a plurality of data packets, the check The packet is obtained by packet encoding the original packet.
The method according to claim 36, further comprising: when the feedback information at the receiving end indicates that the data is received correctly, or when the feedback information at the receiving end indicates the receiving error, dividing the next source data packet to obtain a plurality of sub-data a block, adding a cyclic redundancy check CRC sequence to the plurality of sub-blocks, performing channel coding on the sub-blocks after adding the CRC sequence to obtain an original packet composed of a plurality of channel coding blocks, for the original The packet is encoded by the packet to obtain a verification packet. Performing bit selection on the plurality of channel coding blocks and check packets to obtain first transmission data.
The method of claim 36, before the receiving the feedback information of the receiving end, the method further comprises:

Segmenting a source data packet to obtain a plurality of partial data data blocks, adding a cyclic redundancy check CRC sequence to the plurality of partial data data blocks, and separately performing channel coding on the sub-data blocks after adding the CRC sequence to obtain multiple channels Encoding the original packet, encoding the original packet to obtain a verification packet, performing bit selection on the multiple channel coding block and the verification packet to obtain first transmission data corresponding to the source data packet;

Transmitting the obtained first pass data.
The method of claim 36, wherein the retransmission data is selected from the first data set when the number of retransmitted data bits is less than or equal to N0;

When the number of retransmitted data bits is greater than N0, the retransmission data is selected from the first data set and the second data set, and the number of bits and each bit of each sub-check packet in the retransmitted data is determined according to at least one of the following: Number of bits of the data packet: the total number of bits of the first transmission data, the number of data packets in the original packet, the number of bits of any data packet in the original packet, the total number of bits of retransmitted data, the modulation order, and the number of retransmitted data resources; , N0 is a positive integer.