WO2017121334A1 - Data-processing method and device - Google Patents

Abstract

Disclosed in the present invention is a data-processing method, the method comprising: determining, according to transmission information of a transmission block, a type and length of a cyclic redundancy check code (CRC) to be added to the transmission block; adding a CRC to the transmission block; wherein the type of CRC comprises one of the following: transmission block CRC, code block set CRC, code block CRC. The present invention can adaptively select types and lengths of CRCs, and reduce data transmission redundancy while satisfying system false detection rate requirements, thus improving system transmission rates.

Description

Method and device for data processing Technical field

The present invention relates to the field of communications technologies, and in particular, to a data processing method and apparatus.

Background technique

The transmitting end of the digital communication system usually includes a source, a channel coder and a modulator. The receiving end usually includes a demodulator, a channel decoder and a sink. A schematic diagram of a digital communication system in the prior art is shown in FIG. The channel coder is used to introduce information bits into the information bits according to certain rules so that the receiving channel decoder can correct the errors occurring when the information is transmitted on the channel to some extent. Therefore, channel coding is a Forward Error Correction (FEC) technique.

In general, FEC coding is a process of generating a check bit sequence from an information bit sequence, and the information bit sequence and the check bit sequence together constitute a commonly known code word bit sequence. Commonly used FEC codes include Turbo codes, Low Density Parity Check Codes (LDPCs), and convolutional codes. For example, Turbo codes are used for data transmission in LTE systems; IEEE 802.11 systems are used. It is an LDPC code and a convolutional code.

Polar code is a new star in the coding field. It is a linear channel coding method proposed by Professor Erdal Arikan of the University of Birken University in Turkey based on channel polarization theory in 2008. The code word is the only one discovered so far that can reach the Shannon limit. The encoding method. The core idea of the Polar code is the channel polarization theory, and the polarization methods corresponding to different channels will be different.

The binary turbo coding of LTE is a parallel concatenated code with an internal interleaver, which is generally formed by parallel concatenation of two recursive system convolutional code (RSC) component code encoders having the same structure. The decoder of the turbo code is also composed of two cascaded sub-decoders, a first component decoder and a second component decoder, respectively.

The LDPC code is a linear block code based on a sparse check matrix. By using the sparsity of its check matrix, low-complexity codecs can be realized. LDPC code decoding can be based on Iterative algorithm of belief propagation (referred to as the letter transmission algorithm).

The convolutional code is another commonly used FEC code. The characteristic of the convolutional code is that when the input information of a certain time is encoded, the output is determined not only according to the input of the current time but also according to the input of the p times before the current time. The codewords, ie the generation of codewords, are subject to a total of p+1 input moments. A convolutional code is a finite state machine whose encoding and decoding can be analyzed by means of a grid map. The basic idea of decoding the convolutional code is based on the received codeword, calculating its distance from all other possible continuous grid paths one by one, and selecting the one with the most possibility as the decoded estimate. .

The decoding methods of the various FEC codes described above can obtain decoded estimates of codeword bits or information bits. However, if the result of the decoding is correct, it needs to be detected by some means of error detection.

In data communication, the ideal goal of designing an error control algorithm is to detect more errors with fewer redundant bits. The Cyclic Redundancy Check Code (CRC) based on finite field is a system shortening cyclic code, and it is also an excellent error detection code. It can be used by using a powerful error detection algorithm. Achieve this goal.

The CRC code consists of two parts. The first part is the information code, that is, the information to be verified, and the latter part is the check code. If the CRC code is a total of n bits and the information code is k bits long, it is called a (n, k) code. The coding rules are as follows: 1) shifting, shifting the original information code (k bit) to the left by r bits (r=nk); 2) dividing, using a generator polynomial g(x), modulo 2 in addition to the above shift Formula, the remainder obtained is the check code. It should be noted that the generator polynomial should satisfy the following principles: 1) the highest and lowest bits of the generator polynomial must be 1; 2) when any error occurs in any of the transmitted information (CRC code), the generator polynomial is used to perform modulo 2 division. After that, the remainder should not be 0; 3) When the error occurs in different bits, the remainder should be different; 4) If the remainder continues to be modulo 2, the remainder should be cycled.

Specifically, the basic principle of CRC error detection is: first, for a given set of information data and a generator polynomial, a remainder of the characteristic length can be obtained by calculation, and the remainder is attached to the information data and then sent together; then the receiving end receives the passing After the CRC verified data, the information bits and the check bits are separated; the comparison information bits are separated from the receiving end by the remainder of the local generated polynomial. If the check digits are the same, it is determined that the received data is correct.

Due to its low complexity and excellent performance, CRC codes are widely used in various communication systems. In the familiar 3GPP LTE protocol, the CRC code is used extensively from the physical layer to the upper layer to verify the correctness of the data.

In the existing LTE system, the physical layer data sharing channel is transmitted by using a Transmission Block (TB) as a basic unit. The receiving end determines whether the current TB is correctly received through the cyclic redundancy check code (CRC) of the TB. If the TB is correctly received, the receiving end feeds back an ACK message to the transmitting end; if the TB does not receive correctly, the receiving end feeds back a NACK message to the transmitting end.

The LTE specification lists all code block sizes that can be supported, ranging from a minimum of 40 bits to a maximum of 6114 bits. When the code length of the transport block (including the transport block CRC) exceeds the maximum code block size, code block splitting is required before Turbo coding.

As shown in FIG. 2, a larger TB can also be divided into multiple equal-sized Code Block Sets (CBSs), and each code block set is composed of multiple code blocks.

In order to ensure that any size of the transport block can be divided into code blocks that match the available code block size, LTE introduces the possibility of inserting padding bits in the first code block header. However, the transport block size defined in current LTE is chosen so that padding bits are generally not required. The code block partitioning and CRC insertion including the code block set are as shown in FIG.

Specifically, the data channel adopts a two-level CRC data check mode, which is a Code Block (CB) CRC and a Transport Block (TB) CRC. Both CRCs are 24 bits in length but differ in the generator polynomial. First, the large transport block TB is subjected to CRC check using the root generator polynomial g ^CRC24A (D), and then the code block CB is subjected to CRC check using g ^CRC24B (D). among them:

g ^CRC24A (D)=D24+D23+D18+D17+D14+D11+D10+D7+D6+D5+D4+D3+D+1;

g ^CRC24B (D)=D24+D23+D6+D5+D+1;

With the Internet of Things, Machine Type Communication (MTC) and other new A large number of applications have emerged, and the small packet communication service of a large number of users has become more and more important. IMT-2020 "5G Concept White Paper" proposes that for 2020 and the future, mobile Internet and IoT services will become the main driving force for the development of mobile communications. The main application scenarios and service requirements derived from its development can be summarized into four major technical scenarios of 5G: continuous wide-area coverage, hot-spot high-capacity, low-power large connections, and low latency and high reliability. Among them, the low-power large connection is mainly for smart city, environmental monitoring, intelligent agriculture, forest fire prevention and other application scenarios targeting sensing and data acquisition, with small data packets, low power consumption, massive connection and so on. 4G Americas' 5G White Paper on the “6 Directions for Enhancing/Improving 5G in the Future” specifically points out the need to improve the communication efficiency of short burst or small data type mobile applications. Smartphone applications and many wireless IoT applications frequently exchange information with short-term burst data with their network-side applications, which consumes a lot of valuable signaling resources, increases the power consumption of the terminals, and wastes valuable wireless spectrum. With network capacity (December 2014). In the latest white paper released in June 2015, 4G Americas once again pointed out the need to strengthen research on small data transmission applications.

A small data packet usually refers to data of a single TB block having a length of several tens to several hundreds of bits. According to the existing LTE protocol, even if the short code as above still adds a 24-bit transport block CRC in the Turbo code-based data communication, the direct result is that the 24-bit CRC can provide good error detection performance. Larger redundancy rate, which reduces the transmission efficiency of the wireless channel. However, simply reducing the CRC length may have the drawback of increased false positive rate and limited application. Therefore, it is very important to choose the CRC length reasonably to meet the false detection rate requirement of the actual system and to properly improve the transmission efficiency.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a data processing method and device, which can adaptively select the type and length of the cyclic redundancy check code, and reduce the data transmission redundancy while satisfying the system false detection rate requirement. Improve system transmission efficiency.

An embodiment of the present invention provides a data processing method, where the method includes:

Determining the cyclic redundancy added to the transport block according to the transmission information of the transport block to be transmitted Check the type and length of the CRC code;

Adding a CRC code to the transport block;

The type of the CRC code includes at least one of the following: a transport block CRC code, a code block set CRC code, and a code block CRC code.

Optionally, the transmission information of the transport block includes at least one of the following information: code block split information of the transport block, type and length selection indication information of the CRC code carried in the transmission mode TM, and downlink control information DCI format. The type and length selection indication information of the CRC code carried in the control, the type and length selection indication information of the CRC code carried in the control information scrambling mode;

The code block splitting information of the transport block includes at least one of the following information: a transport block size, a code block set number, a code block set size, a code block number, and a code block size.

Optionally, the transmission information of the transport block includes at least one of the following information: a code rate, a user type, a link direction, a protocol version, a combination of an encoding code rate and a transport block size, an operation operation mode, an overlay level, Application scenario.

Optionally, the method further includes:

Setting a correspondence between a CRC code of each length and a length range of the data block that can be encoded by using the length CRC code;

The data block includes at least one of the following categories: a transport block, a code block set, and a code block.

Optionally, determining the type and length of the CRC code added to the transport block according to the transmission information of the transport block to be sent, including:

Determining, according to code block splitting information of the transport block, a length of each data block included in the transport block;

For each data block, a range of data block lengths corresponding to CRC codes of various lengths is queried, and an alternative CRC code length that can be adopted by the data block is determined.

Optionally, determining the type and length of the CRC code added to the transport block according to the transmission information of the transport block to be sent, including:

When the transport block includes one code block, add a transport block CRC code to the transport block or Adding a code block CRC code to the code block in the transport block; or

Adding a code block CRC code to each code block in the transport block when the transport block includes a plurality of code blocks; or adding a transport block CRC code to the transport block, and in the transport block Adding a code block CRC code to each code block;

When the transport block includes a code block set:

Adding a code block set CRC code to each code block set in the transport block; or

Adding a transport block CRC code to the transport block, and adding a code block set CRC code to each of the code block sets; or

Adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set; or

A transport block CRC code is added to the transport block, a code block set CRC code is added to each code block set in the transport block, and a code block CRC code is added to each code block in each code block set.

Optionally, the length of the CRC code of the transport block is greater than or equal to the length of the CRC code of the code block set, and the length of the CRC code of the code block set is greater than or equal to the length of the CRC code of the code block.

Optionally, a generator polynomial used when the transport block CRC code is added to the transport block, a generator polynomial used when adding the code block set CRC code to the transport block, and a code block CRC code added to the transport block. The generator polynomial used at the time, any of the three is an irreducible polynomial.

An embodiment of the present invention further provides an apparatus for data processing, including:

a selection module configured to determine a type and a length of a cyclic redundancy check CRC code added to the transport block according to transmission information of a transport block to be transmitted;

a CRC encoding module, configured to add a CRC code to the transport block;

The type of the CRC code includes at least one of the following: a transport block CRC code, a code block set CRC code, and a code block CRC code.

Optionally, the transmission information of the transport block includes at least one of the following information: The code block splitting information, the type and length selection indication information of the CRC code carried in the transmission mode TM, the type and length selection indication information of the CRC code carried in the DCI format of the downlink control information, and the CRC carried in the scrambling mode of the control information Type and length selection indication information of the code;

The code block splitting information of the transport block includes at least one of the following information: a transport block size, a code block set number, a code block set size, a code block number, and a code block size.

Optionally, the device further includes:

a setting module configured to set a correspondence between a CRC code of each length and a length range of a data block that can be encoded by using the length CRC code;

The data block includes at least one of the following categories: a transport block, a code block set, and a code block.

Optionally, the selecting module is configured to determine, according to the transmission information of the transport block to be sent, the type and length of the candidate CRC code added to the transport block, including:

Determining, according to code block splitting information of the transport block, a length of each data block included in the transport block;

For each data block, a range of data block lengths corresponding to CRC codes of various lengths is queried, and an alternative CRC code length that can be adopted by the data block is determined.

Optionally, the selecting module is configured to determine, according to the transmission information of the transport block to be sent, the type and length of the CRC code added to the transport block, including:

Adding a transport block CRC code to the transport block or adding a code block CRC code to a code block in the transport block when the transport block includes one code block; or

Adding a code block CRC code to each code block in the transport block when the transport block includes a plurality of code blocks; or adding a transport block CRC code to the transport block, and in the transport block Adding a code block CRC code to each code block;

When the transport block includes a code block set:

Adding a code block set CRC code to each code block set in the transport block; or

Adding a transport block CRC code to the transport block, and adding a code block set CRC code to each of the code block sets; or

Adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set; or

A transport block CRC code is added to the transport block, a code block set CRC code is added to each code block set in the transport block, and a code block CRC code is added to each code block in each code block set.

Optionally, the length of the CRC code of the transport block is greater than or equal to the length of the CRC code of the code block set, and the length of the CRC code of the code block set is greater than or equal to the length of the CRC code of the code block.

Optionally, the CRC encoding module adds a generator polynomial used in transmitting the block CRC code to the transport block, a generator polynomial used when adding the code block set CRC code to the transport block, and adding a code to the transport block. The generator polynomial used in the block CRC code, any of the three is an irreducible polynomial.

In the embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for executing the implementation of the data processing method in the foregoing embodiment.

Compared with the prior art, a data processing method and apparatus provided by an embodiment of the present invention determines a type of a cyclic redundancy check CRC code added to the transport block according to transmission information of a transport block to be transmitted. The length, by flexibly selecting the type and the appropriate length of the CRC code for the transport block, can avoid the data transmission redundancy caused by the fixed type and the large length CRC code, and improve the system transmission efficiency.

DRAWINGS

1 is a schematic diagram of a digital communication system in the related art.

2 is a schematic diagram of a code block set in the related art.

FIG. 3 is a schematic diagram of code block division and CRC insertion of a transport block (including a code block set) in the related art.

FIG. 4 is a flowchart of a method for data processing according to an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of an apparatus for data processing according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

As shown in FIG. 4, an embodiment of the present invention provides a data processing method, where the method includes:

S401. Determine, according to transmission information of a transport block to be sent, a type and a length of a cyclic redundancy check CRC code added to the transport block.

S402. Add a CRC code to the transport block.

The type of the cyclic redundancy check CRC code includes at least one of the following: a transport block CRC code, a code block set CRC code, and a code block CRC code;

The code block splitting information of the transport block includes at least one of the following information: a transport block size, a code block set number, a code block set size, a code block number, and a code block size;

The transmission information of the transport block includes at least one of the following information: an encoding code rate, a user type, a link direction, a protocol version, a combination of an encoding code rate and a transport block size, an operation operation mode, an overlay level, and an application scenario. .

For example, different CRCs may be selected according to different coding rate, and a certain code rate threshold is set to determine different code rate ranges. For example, a code rate higher than the threshold is collectively referred to as a high code rate. The determined CRC code type and length are specified, and the code rate below the threshold is collectively referred to as the low code rate, and an additional determined CRC code type and length can be specified.

Or, select different CRC code types and lengths according to different user types;

Alternatively, the type and length of the CRC code are selected according to different link directions, and the uplink and downlink may have different options;

Or, depending on the version of the agreement, such as R12 and previous versions and R13 and later Version, you can choose a different CRC code;

Alternatively, the type and length of the CRC code are selected according to a combination of the code rate and the transport block size. For example, the same small transport block or a large transport block can select one CRC code when the code rate is low, and when the code rate is high, Then you need to choose another CRC code.

Or, according to different operating modes, or Inband mode or Outband mode or Standalone mode, select different CRC codes;

Or, according to different coverage levels, different CRC codes are selected, and the high coverage level means that the coverage of the signal is large, and the appropriate CRC code can be selected according to the specific requirements of the performance, and correspondingly, the coverage level is low, and the signal coverage is small. Select a different CRC code;

Or, select different CRC codes according to different application scenarios. The ITU-R (International Telecommunication Union Radiocommunication Bureau) has determined that the future 5G has the following three main application scenarios: (1) enhanced mobile broadband eMBB; (2) ultra-reliable and low-latency communication URLLC; (3) large Scale machine type communication mMTC. These include: Gbps mobile broadband data access, smart home, smart buildings, voice calls, smart cities, 3D stereo video, ultra high definition video, cloud work, cloud entertainment, augmented reality, industry automation, emergency mission applications, autonomous driving Cars, etc. Numerous scenarios have different options for the type and length of the CRC code.

The transmission information of the transport block may further include at least one of the following information: code block split information of the transport block, type and length selection indication information of the CRC code carried in the transmission mode TM, and DCI format of the downlink control information. The type and length selection indication information of the CRC code carried in the control, the type and length selection indication information of the CRC code carried in the control information scrambling mode;

Wherein, determining the type and length of the cyclic redundancy check CRC code added to the transport block according to the code block splitting information of the transport block to be transmitted, including:

Adding a transport block CRC code to the transport block or adding a code block CRC code to a code block in the transport block when the transport block includes one code block; or

Adding a code block CRC code to each of the transport blocks when the transport block includes a plurality of code blocks; or adding a transport block CRC code to the transport block, and for the transport block a code block CRC code is added to each code block in the medium;

Adding a code block set CRC code to each code block set in the transport block when the transport block includes a code block set; or adding a transport block CRC code to the transport block, and in the transport block Adding a code block set CRC code to each code block set; or adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set Or adding a transport block CRC code to the transport block, adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set. ;

The long transport block may be divided into multiple code blocks or code block sets after adding the transport block CRC code, and each code block or code block set is added with a CRC code. It should be noted that the addition of different types of CRC codes is not necessary, but is determined according to the transmission information of the transport block.

The transmission mode is simply referred to as the TM mode. In the embodiment of the present invention, the transmission mode carries the indication information related to the type and length of the CRC code;

For example, a transmission mode (for example, TM10) may be newly defined, and the type and length selection indication information of the CRC code is carried in the TM10. For example, the indication information related to the type and length selection of the CRC code in the TM10 indicates that the transport block needs to add a 24-bit transport block CRC code and a 16-bit code block CRC code, or the transport block needs to add a 24-bit transport block CRC. Specific indication information such as a code, a 16-bit code block set CRC code, and an 8-bit code block CRC code.

The DCI (Downlink Control Information) carries detailed control information for uplink and downlink transmissions, and different transmission scenarios may correspond to different DCI formats. In the embodiment of the present invention, the DCI format is used. Carrying specific indication information of the type and length selection of the CRC code; for example, for a transport block comprising two code block sets, wherein each code block set includes three code blocks, the DCI format carries 16 bits added to the transport block. The code block gathers the CRC code and the indication information of the 16-bit code block CRC code.

Wherein, when the DCI indicates the information of the cell level, the SI-RNTI (RNTI, Radio) may be used. Network Tempory Identity/P-RNTI/RA-RNTI scrambling. When the DCI indicates UE-level information, it can be scrambled using C-RNTI/SPS C-RNTI/Temporary C-RNTI. In the embodiment of the present invention, a scrambling code information X-RNTI is newly defined, and the type and length selection indication information of the CRC code are included in the X-RNTI. For example, to implement transmission of a single-code block transport block of length 600 bits, the scrambling code information X-RNTI includes indication information for adding a 16-bit code block CRC code to the transport block.

The method further includes:

A correspondence relationship between a CRC code of each length and a length range of a data block that can be encoded using the length CRC code is set.

The data block includes at least one of the following categories: a transport block, a code block set, and a code block;

For example, if the CRC code of length nbit is used for encoding, the length of the applicable data block ranges from 0 to 2 ⁿ bit; that is, the longer the CRC code, the longer it can correspond to the long data block;

A common CRC code has a length of 4 bits, 8 bits, 12 bits, 16 bits, 24 bits, etc., and can be selected therefrom, but is not limited to the values listed above.

The above setting values are for the general case where the CRC is only used for error detection, and if the decoding method is improved, the range can be appropriately relaxed. For example, in principle, the code length interval corresponding to the 4-bit CRC is 0 to 16 bits. However, if the decoding end uses the CRC code combined with the code space (Turbo code) for decoding, the applicable range of the 4-bit CRC can be expanded several times. As a result of the simulation verification, the 4-bit CRC is also applicable to the code length of 180 bits. This range of application will vary with the performance of the decoding algorithm.

Wherein, determining the type and length of the CRC code added to the transport block according to the transmission information of the transport block to be transmitted, including:

Determining, according to code block splitting information of the transport block, a length of each data block included in the transport block;

For each data block, query a data block length range corresponding to each length of the CRC code, and determine an optional CRC code length that can be adopted by the data block;

The length of the CRC code of the transport block is greater than or equal to the length of the CRC code of the code block set, and the length of the CRC code of the code block set is greater than or equal to the length of the CRC code of the code block.

Specifically, when only one code block is included in the transport block, only one transport block CRC code or code block CRC code may be added to the transport block.

When a plurality of code blocks are included in the transport block, a code block CRC code may be added only to each code block.

When the transport block includes multiple code blocks, a transport block CRC code may be added to the transport block, and then a code block CRC code is added to each code block, where the length of the transport block CRC code is L _TB and the code block CRC code. The relationship of length L _CB is: L _TB ≥ L _CB ; for example, if the transport block CRC code length is 16 bits, the code block CRC can take 16 bit CRC or other alternative CRC with a length less than 16 bits.

When the plurality of code block sets are included in the transport block, the code block set CRC code may be added only to each code block set;

When the transport block includes multiple code block sets, a transport block CRC code may be added to the transport block, and then a code block set CRC code is added to each code block set, where the length of the transport block CRC code is L _TB and code. The length of the block set CRC code L _CBS is: L _TB ≥ L _CBS ; for example, the transport block CRC takes 16 bits, and the code block set CRC takes 16 bits or other alternative CRC with a length less than 16 bits.

When the transport block includes multiple code block sets, the code block set CRC code may be added to each code block set, and then the code block CRC code is added to each code block in the code block set, where the code block set CRC The relationship between the length L _{CBS of the} code and the length L _CB of the code block CRC code is: L _CBS ≥ L _CB ; for example, if the code block set CRC takes 8 bits, the code block CRC may take 8 bits or other alternative CRC with a length less than 8 bits.

When the transport block includes multiple code block sets, a transport block CRC code may be added to the transport block, then a code block set CRC code is added to each code block set, and finally, a code is added to each code block in the code block set. a block CRC code, wherein a length L _{TB of the} transport block CRC code, a length L _{CBS of the} code block set CRC code, and a length L _CB of the code block CRC code are: L _TB ≥ L _CBS ≥ L _CB ; for example, a transport block The CRC is 24 bits. The CRC length of the code block set can be 24 bits or other CRC of the candidate code block set with a length less than 24 bits. The code block CRC length can take 24 bits, or other candidate blocks with a length less than 24 bits and CRC.

Wherein, adding a CRC code to the transport block includes:

Adding a generator polynomial used in the transport block CRC code to the transport block, a generator polynomial used to add the code block set CRC code to the transport block, and a generator polynomial used to add the code block CRC code to the transport block, Any two of them are irreducible polynomials;

The above is applicable to commonly used encoding methods such as block codes, convolutional codes, LDPC codes, and Turbo codes.

As shown in FIG. 5, an embodiment of the present invention provides an apparatus for data processing, including:

a selection module configured to determine a type and a length of a cyclic redundancy check CRC code added to the transport block according to transmission information of a transport block to be transmitted;

a CRC encoding module, configured to add a CRC code to the transport block;

The type of the CRC code includes at least one of the following: a transport block CRC code, a code block set CRC code, and a code block CRC code.

The transmission information of the transport block includes at least one of the following information: code block split information of the transport block, type and length selection indication information of the CRC code carried in the transmission mode TM, and downlink control information carried in the DCI format. Type and length selection indication information of the CRC code, type and length selection indication information of the CRC code carried in the control information scrambling mode;

The code block splitting information of the transport block includes at least one of the following information: a transport block size, a code block set number, a code block set size, a code block number, and a code block size.

Wherein, the device further comprises:

a setting module configured to set a correspondence between a CRC code of each length and a length range of a data block that can be encoded by using the length CRC code;

The data block includes at least one of the following categories: a transport block, a code block set, and a code block.

The selection module is configured to determine, according to the transmission information of the transport block to be sent, the type and length of the candidate CRC code added to the transport block, including:

Determining, according to code block splitting information of the transport block, a length of each data block included in the transport block;

For each data block, a range of data block lengths corresponding to CRC codes of various lengths is queried, and an alternative CRC code length that can be adopted by the data block is determined.

The selection module is configured to determine, according to the transmission information of the transport block to be sent, the type and length of the CRC code added to the transport block, including:

Adding a transport block CRC code to the transport block or adding a code block CRC code to a code block in the transport block when the transport block includes one code block; or

Adding a code block CRC code to each code block in the transport block when the transport block includes a plurality of code blocks; or adding a transport block CRC code to the transport block, and in the transport block Adding a code block CRC code to each code block;

When the transport block includes a code block set:

Adding a code block set CRC code to each code block set in the transport block; or

Adding a transport block CRC code to the transport block, and adding a code block set CRC code to each of the code block sets; or

Adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set; or

A transport block CRC code is added to the transport block, a code block set CRC code is added to each code block set in the transport block, and a code block CRC code is added to each code block in each code block set.

The length of the CRC code of the transport block is greater than or equal to the length of the CRC code of the code block set, and the length of the CRC code of the code block set is greater than or equal to the length of the CRC code of the code block.

The CRC encoding module adds a generator polynomial used in the transport block CRC code to the transport block, a generator polynomial used when adding the code block set CRC code to the transport block, and adds a code block CRC to the transport block. The generator polynomial used in the code, any of the three is an irreducible polynomial.

The method and apparatus for data processing provided by the foregoing embodiment determine the type and length of the cyclic redundancy check CRC code added to the transport block according to the transmission information of the transport block to be transmitted, by flexibly transmitting the block Selecting the type and appropriate length of the CRC code can avoid data transmission redundancy caused by fixed type and longer length CRC codes, and improve system transmission efficiency.

One of ordinary skill in the art will appreciate that all or a portion of the steps described above can be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic or optical disk, and the like. Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented by using a software function module. Formal realization. The invention is not limited to any specific form of combination of hardware and software.

It is to be understood that the invention may be susceptible to various other modifications and changes in the embodiments of the present invention without departing from the spirit and scope of the invention. Corresponding changes and modifications are intended to be included within the scope of the appended claims.

Industrial applicability

The foregoing technical solution provided by the embodiment of the present invention may be applied to a data processing process, and determining, according to transmission information of a transport block to be transmitted, a type and length of a cyclic redundancy check CRC code added to the transport block, Selecting the type and the appropriate length of the CRC code for the transport block can avoid the data transmission redundancy caused by the fixed type and the large length CRC code, and improve the system transmission efficiency.

Claims (15)

1. A method of data processing, the method comprising:

   Determining a type and a length of a cyclic redundancy check CRC code added to the transport block according to transmission information of a transport block to be transmitted;

   Adding a CRC code to the transport block;

   The type of the CRC code includes at least one of the following: a transport block CRC code, a code block set CRC code, and a code block CRC code.
2. The method of claim 1 wherein:

   The transmission information of the transport block includes at least one of the following information: code block split information of the transport block, type and length selection indication information of the CRC code carried in the transmission mode TM, and CRC carried in the DCI format of the downlink control information The type and length selection indication information of the code, the type and length selection indication information of the CRC code carried in the control information scrambling mode;

   The code block splitting information of the transport block includes at least one of the following information: a transport block size, a code block set number, a code block set size, a code block number, and a code block size.
3. The method of claim 1 wherein:

   The transmission information of the transport block includes at least one of the following information: an encoding code rate, a user type, a link direction, a protocol version, a combination of an encoding code rate and a transport block size, an operation operation mode, an overlay level, and an application scenario.
4. The method of claim 2, wherein the method further comprises:

   Setting a correspondence between a CRC code of each length and a length range of the data block that can be encoded by using the length CRC code;

   The data block includes at least one of the following categories: a transport block, a code block set, and a code block.
5. The method of claim 4 wherein:

   Determining the type and length of the CRC code added to the transport block according to the transmission information of the transport block to be transmitted, including:

   Determining, according to code block splitting information of the transport block, a length of each data block included in the transport block;

   For each data block, a range of data block lengths corresponding to CRC codes of various lengths is queried, and an alternative CRC code length that can be adopted by the data block is determined.
6. The method of claim 2 wherein:

   Determining the type and length of the CRC code added to the transport block according to the transmission information of the transport block to be transmitted, including:

   Adding a transport block CRC code to the transport block or adding a code block CRC code to a code block in the transport block when the transport block includes one code block; or

   Adding a code block CRC code to each code block in the transport block when the transport block includes a plurality of code blocks; or adding a transport block CRC code to the transport block, and in the transport block Adding a code block CRC code to each code block;

   When the transport block includes a code block set:

   Adding a code block set CRC code to each code block set in the transport block; or

   Adding a transport block CRC code to the transport block, and adding a code block set CRC code to each of the code block sets; or

   Adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set; or

   Adding a transport block CRC code to the transport block, for each code block in the transport block The set adds a code block set CRC code and adds a code block CRC code to each code block in each code block set.
7. The method of claim 6 wherein:

   The length of the CRC code of the transport block is greater than or equal to the length of the CRC code of the code block set, and the length of the CRC code of the code block set is greater than or equal to the length of the CRC code of the code block.
8. The method of claim 1 wherein:

   a generator polynomial used when adding a transport block CRC code to the transport block, a generator polynomial used when adding a code block set CRC code to the transport block, and a generation used when adding a code block CRC code to the transport block Polynomial, any of the three is an irreducible polynomial.
9. A device for data processing, comprising:

   a selection module configured to determine a type and a length of a cyclic redundancy check CRC code added to the transport block according to transmission information of a transport block to be transmitted;

   a CRC encoding module, configured to add a CRC code to the transport block;

   The type of the CRC code includes at least one of the following: a transport block CRC code, a code block set CRC code, and a code block CRC code.
10. The apparatus of claim 9 wherein:

    The transmission information of the transport block includes at least one of the following information: code block split information of the transport block, type and length selection indication information of the CRC code carried in the transmission mode TM, and CRC carried in the DCI format of the downlink control information The type and length selection indication information of the code, the type and length selection indication information of the CRC code carried in the control information scrambling mode;

    The code block splitting information of the transport block includes at least one of the following information: Small, number of code block sets, code block set size, number of code blocks, code block size.
11. The apparatus of claim 10, further comprising:

    a setting module configured to set a correspondence between a CRC code of each length and a length range of a data block that can be encoded by using the length CRC code;

    The data block includes at least one of the following categories: a transport block, a code block set, and a code block.
12. The apparatus of claim 11 wherein:

    And a selection module configured to determine the type and length of the candidate CRC code added to the transport block according to the transmission information of the transport block to be transmitted, including:

    Determining, according to code block splitting information of the transport block, a length of each data block included in the transport block;

    For each data block, a range of data block lengths corresponding to CRC codes of various lengths is queried, and an alternative CRC code length that can be adopted by the data block is determined.
13. The apparatus of claim 10 wherein:

    a selection module configured to determine a type and a length of a CRC code added to the transport block according to transmission information of a transport block to be transmitted, including:

    Adding a transport block CRC code to the transport block or adding a code block CRC code to a code block in the transport block when the transport block includes one code block; or

    Adding a code block CRC code to each code block in the transport block when the transport block includes a plurality of code blocks; or adding a transport block CRC code to the transport block, and in the transport block Adding a code block CRC code to each code block;

    When the transport block includes a code block set:

    Adding a code block set CRC code to each code block set in the transport block; or

    Adding a transport block CRC code to the transport block, and adding a code block set CRC code to each of the code block sets; or

    Adding a code block set CRC code to each code block set in the transport block, and adding a code block CRC code to each code block in each code block set; or

    A transport block CRC code is added to the transport block, a code block set CRC code is added to each code block set in the transport block, and a code block CRC code is added to each code block in each code block set.
14. The apparatus of claim 13 wherein:

    The length of the CRC code of the transport block is greater than or equal to the length of the CRC code of the code block set, and the length of the CRC code of the code block set is greater than or equal to the length of the CRC code of the code block.
15. The apparatus of claim 9 wherein:

    The CRC encoding module adds a generator polynomial used in transmitting the block CRC code to the transport block, a generator polynomial used when adding the code block set CRC code to the transport block, and adding a code block CRC code to the transport block. The generator polynomial used, any of the three is an irreducible polynomial.

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