CN115664596A

CN115664596A - Data coding method and device

Info

Publication number: CN115664596A
Application number: CN202211313917.8A
Authority: CN
Inventors: 袁雅琴; 刘湘蒲; 王晓翔
Original assignee: China Star Network Application Co Ltd
Current assignee: China Star Network Application Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-01-31

Abstract

The invention provides a data encoding method and a device, wherein the method comprises the following steps: the sending equipment encodes data to be sent, determines the length of punctured bits according to the length of the encoded data and a preset length, and conducts punching processing on a bit sequence in the encoded data according to the length of the punctured bits to obtain processed data, wherein the length of the processed data is the preset length, and the bit sequence comprises check bits and tail bits. By the data coding method, the problems that a coding rate matching method is complex and a large amount of storage space is required in the current data transmission process can be solved.

Description

Data coding method and device

Technical Field

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

Background

The satellite system can be a supplement to a ground cellular mobile communication network by providing backhaul service, base station remote and the like, and the integration of satellite communication and ground cellular mobile communication can realize seamless coverage of the full-time universe and can be a popular communication means. At present, the related technology of the terrestrial cellular mobile communication is mature, but in the satellite communication, the satellite has the characteristics of high-speed movement, limited transmission distance and power, and the like, and is difficult to be merged with the terrestrial cellular mobile communication.

Currently, in the data transmission process of the ground cellular mobile communication, when the physical layer performs coding processing on data, puncturing matrix is used to realize coding rate matching. And (3) predefining the puncturing matrix to obtain a position needing to be punctured corresponding to a preset value (for example, 1) in the puncturing matrix according to the distribution of the puncturing matrix, and finally multiplying the puncturing matrix of the determined puncturing positions by the bit sequence of the coded data to complete puncturing, thereby outputting a final coding result. As can be seen, the above coding rate matching method is complex and requires a large amount of memory space.

Disclosure of Invention

The invention provides a data coding method and a data coding device, which are used for solving the problems that a coding rate matching method is complex and a large amount of storage space is required to be occupied in the current data transmission process.

In a first aspect, an embodiment of the present invention provides a data encoding method, including:

the sending equipment encodes data to be sent;

the sending equipment determines the length of the punctured bits according to the length of the coded data and a preset length;

and the sending equipment performs punching processing on a bit sequence in the coded data according to the length of the punctured bits to obtain processed data, wherein the length of the processed data is the preset length, and the bit sequence comprises check bits and tail bits.

According to the technical scheme, the bit sequence in the coded data is punched through the length of the punctured bits, the defect of using a punctured matrix is overcome, the method is simple, the occupation of a storage space is reduced, and the timeliness of the data sending process is improved.

In one or more embodiments, the method for encoding the data to be transmitted by the transmitting device includes: and the sending equipment adopts a Turbo coding mode to code the data to be sent.

In one or more embodiments, the puncturing, by the sending device, the bit sequence in the encoded data according to the length of the punctured bits includes: and the sending equipment performs punching processing on the bit sequence in the coded data by adopting a preset interval, wherein the preset interval is determined according to the length of the punctured bits.

In one or more embodiments, before the transmitting device encodes the data to be transmitted, the method further includes: and the sending equipment adds a cyclic redundancy check code to the data to be sent.

In one or more embodiments, after obtaining the processed data, further comprising: and the sending equipment modulates the processed data by adopting the quadrature phase shift keying.

In a second aspect, an embodiment of the present invention provides a data encoding apparatus, including:

the processing unit is used for coding data to be sent;

the processing unit is used for determining the length of the punctured bits according to the length of the coded data and a preset length;

the processing unit is configured to perform puncturing processing on a bit sequence in the encoded data according to the length of the punctured bits to obtain processed data, where the length of the processed data is the preset length, and the bit sequence includes check bits and tail bits.

In one or more embodiments, the processing unit is configured to, when encoding the data to be sent, encode the data to be sent by adopting a Turbo coding mode.

In one or more embodiments, the processing unit is configured to, when performing puncturing processing on a bit sequence in the encoded data according to the length of the punctured bits, perform puncturing processing on the bit sequence in the encoded data with a preset interval, where the preset interval is determined according to the length of the punctured bits.

In one or more embodiments, the processing unit is configured to add a cyclic redundancy check code to the data to be sent before encoding the data to be sent.

In one or more embodiments, the processing unit is configured to, after obtaining the processed data, modulate the processed data by using quadrature phase shift keying.

In a third aspect, the present application further provides an apparatus. The device can execute the method design. The apparatus may be a chip or a circuit capable of executing a function corresponding to the method, or a device including the chip or the circuit.

In one or more embodiments, the apparatus comprises: a memory for storing computer executable program code; and a processor coupled with the memory. Wherein the program code stored in the memory comprises instructions which, when executed by the processor, cause the apparatus or a device in which the apparatus is installed to perform the method of any of the above possible designs.

Wherein the apparatus may further comprise a communication interface, which may be a transceiver, or, if the apparatus is a chip or a circuit, an input/output interface of the chip, such as input/output pins or the like.

In one or more embodiments, the apparatus comprises corresponding functional units, each for implementing a step in the above method. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program for performing the method of any one of the above possible designs when the computer program is run on an apparatus.

In addition, for technical effects brought by any one implementation manner of the second aspect to the fourth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect, and details are not described here.

Drawings

FIG. 1 is a diagram of a conventional wireless protocol architecture in accordance with the present invention;

FIG. 2 is a flow chart of data processing of a conventional physical layer according to the present invention;

fig. 3 is a schematic diagram of a data encoding method according to an embodiment of the present invention;

fig. 4 is a flowchart of processing data to be transmitted by the transmitting device according to the embodiment of the present invention;

fig. 5 is a communication apparatus 500 according to an embodiment of the present invention;

fig. 6 is a diagram of another communication apparatus 600 according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.

The 6G is an extension of the 5G system, aims to create a full-connection communication world integrating ground communication, satellite communication and ocean communication, and aims to meet the social communication demand in the next decade. The satellite communication network is used as a 6G main key technology and can supplement ground communication to form an air-space-ground integrated three-dimensional communication network, so that seamless global coverage of areas such as high altitude, outer space, ocean, deep sea, mountainous areas, deserts and the like is realized.

The satellite communication consists of a satellite end, a ground end and a user end, is not limited by geographical conditions and has flexible mobility. Satellite communications can be generally classified by orbital altitude into Low Earth Orbit satellites (LEO), medium Earth Orbit satellites (MEO), and Geosynchronous Earth Orbit satellites (GEO). The low earth orbit satellite, also called low orbit satellite, has the advantages of low height, small transmission time delay, low path loss, small satellite volume, large satellite number, wide coverage and the like compared with other orbit satellites. In recent years, with the great reduction of the satellite miniaturization, light weight and low-orbit launching cost and the development of the internet of things and the mobile internet, the low-orbit satellite has been in a new trend. On the other hand, the technologies such as cellular communication, multiple access, spot beam, frequency reuse and the like also provide technical support for the low-orbit satellite mobile communication.

Fig. 1 is a schematic diagram of a conventional Radio Protocol architecture, and the Radio Protocol architecture shown in fig. 1 includes a Radio Resource Control (RRC), a Packet Data Convergence Protocol (PDCP), a Radio Link Control (RLC), a Media Access Control (MAC), and a Physical Layer (PHY).

Fig. 2 is a flowchart of data processing of a conventional physical layer, where a specific process of data processing by the current physical layer is as follows:

firstly, adding Cyclic Redundancy Check (CRC), then carrying out code block segmentation on data with the length exceeding 6144 limit, improving the reliability of the data through coding, and carrying out rate matching in order to ensure the matching of data quantity and transmission resources; combining the segmented code blocks subjected to channel coding again through code block cascade, reducing data interference and bearing more information through scrambling and modulation, and further matching the number of codes, the number of layers/streams and the number of antenna ports by utilizing layer mapping; and finally, mapping the data corresponding to each antenna port to two-dimensional time-frequency resources through resource mapping and baseband generation to generate baseband signals.

Currently, the mainstream satellite transmission standard is a Digital satellite television system (DVB-S), taking a DVB-S2 sending end system as an example, the main process of the system architecture is as follows:

firstly, carrying out mode adaptation to adapt to various input stream formats; then CRC encoding and Forward Error Correction code (FEC) encoding are carried out, and information reliability is improved; and then, the anti-interference performance of signals is improved through interweaving, modulation and scrambling.

The sending device in the present application may be a base station (base station), an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, based on a satellite communication and ground cellular mobile communication fusion principle. The embodiment of the present application does not limit the specific device form adopted by the sending device.

The transmitting device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellite vehicles. The embodiment of the present application does not limit an application scenario of the transmitting device.

Based on this, the application provides a data encoding method, which is used for solving the problems that the encoding rate matching method is complex and needs to occupy a large amount of storage space in the current data transmission process. The processing flow of the sending device to the data to be sent is shown in fig. 4.

As shown in fig. 3, the method includes:

step 300: the transmitting device encodes data to be transmitted.

First, the transmitting device adds CRC to data to be transmitted, so that the receiving device performs error detection. And then coding the data to be transmitted after the CRC is added.

In one or more embodiments, the transmitting device may encode the data to be transmitted using Turbo coding.

Step 310: and the sending equipment determines the length of the punctured bits according to the coded data length and the preset length.

In one or more embodiments, the data to be transmitted after CRC addition is first processed by a Turbo encoder, and then the length of the punctured bits is determined according to the data length output after the Turbo encoder processing (i.e., the data length after encoding) and the data length finally required to be output by adopting a Turbo encoding mode (i.e., a preset length). The preset length may be pre-configured, for example, specified when data transmission is started.

In one or more embodiments, the length of the punctured bits is obtained by subtracting a preset length from the length of data output after processing by the Turbo encoder, and the length of the punctured bits is the number of bits to be punctured.

Step 320: and the transmitting equipment performs punching processing on the bit sequence in the coded data according to the length of the punctured bits to obtain the processed data.

In one or more embodiments, a bit sequence in data (i.e., encoded data) output after being processed by a Turbo encoder is punctured based on a length of punctured bits, and the puncturing is completed until the length of the data satisfies a preset length, so as to obtain data (i.e., processed data) encoded by using a Turbo encoding method. Wherein the bit sequence comprises check bits and tail bits.

In one or more embodiments, when puncturing the bit sequence in the encoded data according to the length of the punctured bits, the transmitting device performs puncturing on the bit sequence in the encoded data with a preset interval, where the preset interval is determined according to the length of the punctured bits. For example, the length of the punctured bits is small and the preset interval is large. The length of the punctured bits is longer and the preset interval is smaller.

The process of performing puncturing on the data output by the Turbo encoder (i.e., the encoded data) may also be referred to as a coding rate matching process.

For example, the length of the data output after the Turbo encoder processing is 100, and the preset length is 80, then the puncturing bit length is 20, that is, 20-bit holes need to be punched in the bit sequence of the data output after the Turbo encoder processing, and the 20-bit holes are equidistant, so that the data encoded by the Turbo encoding method with the length of 80 can be obtained after the holes are punched.

Compared with the existing coding rate matching mode, the Turbo coding mode rate matching method does not need to utilize a puncturing matrix, so that the hardware storage cost is reduced, the rate matching method is simplified, and the timeliness of the whole process is improved.

In addition, after the data to be transmitted is coded, interleaving processing can be performed on the data, so that the anti-interference capability can be enhanced, then, the interleaved data is scrambled, and the anti-interference capability of signals can be further enhanced.

For the scrambled data to be transmitted, the transmitting device may further perform modulation processing, so that the radio resource may carry more messages. In one or more embodiments, the transmitting device may modulate the scrambled data to be transmitted using Quadrature Phase Shift Keying (QPSK).

At present, in the aspect of a physical layer of satellite transmission, a universal DVB system adopts multiple modulation modes, including multiple high-order modulation modes, so that the frequency band utilization rate is higher, but the requirement on channel quality is higher.

Finally, digital front-end processing (DFE) is performed on the modulated data to be transmitted, so that the data can be filtered and output according to the sampling rate.

Through the processing flow, the transmission efficiency of the data to be transmitted can be improved, and the satellite communication scene can be better adapted.

The division of the unit in the embodiments of the present invention is schematic, and is only a logical function division, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present invention may be integrated in one processor, may also exist alone physically, or may also be integrated in one unit by two or more units. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

An embodiment of the present invention further provides a communication apparatus 500, as shown in fig. 5, including: a processing module 510 and a transceiver module 520.

The transceiving module 520 may include a receiving unit and a transmitting unit. The processing module 510 is used for controlling and managing the operation of the communication device 500. The transceiver module 520 is used to support communication between the communication device 500 and other devices. In one or more embodiments, the communications apparatus 500 can also include a memory unit for storing program codes and data for the communications apparatus 500.

In one or more embodiments, the modules in the communication apparatus 500 may be implemented by software.

In one or more embodiments, the processing module 510 may be a processor or controller, such as a general purpose Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure of the embodiments of the application. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The transceiver module 520 may be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is referred to as a general term, and in a specific implementation, the communication interface may include a plurality of interfaces, and the storage unit may be a memory.

The processing module 510 invokes the transceiving module 520 to perform:

encoding data to be transmitted;

determining the length of the puncturing bits according to the length of the coded data and a preset length;

and performing puncturing processing on a bit sequence in the encoded data according to the length of the punctured bits to obtain processed data, wherein the length of the processed data is the preset length, and the bit sequence comprises check bits and tail bits.

Another communication apparatus 600 is provided in the embodiment of the present invention, as shown in fig. 6, including:

a communication interface 601, a memory 602, and a processor 603;

wherein, the communication apparatus 600 communicates with other devices, such as receiving and sending messages, through the communication interface 601; a memory 602 for storing program instructions; a processor 603 for calling the program instructions stored in the memory 602, and executing the method according to the obtained program.

The processor 603 invokes the program instructions stored in the communication interface 601 and memory 602 to perform:

encoding data to be transmitted;

and performing puncturing processing on a bit sequence in the coded data according to the length of the punctured bits to obtain processed data, wherein the length of the processed data is the preset length, and the bit sequence comprises check bits and tail bits.

In the embodiment of the present invention, the specific connection medium among the communication interface 601, the memory 602, and the processor 603 is not limited, for example, a bus, and the bus may be divided into an address bus, a data bus, a control bus, and the like.

In one or more embodiments, the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

In one or more embodiments, the memory may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory can also be, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in embodiments of the present invention may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

Embodiments of the present invention further provide a computer-readable storage medium, which includes program code for causing a computer to perform the steps of the method provided in the foregoing embodiments of the present invention when the program code runs on the computer.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of encoding data, comprising:

the sending equipment encodes data to be sent;

2. The method of claim 1, wherein the transmitting device encodes the data to be transmitted, comprising:

and the sending equipment adopts a Turbo coding mode to code the data to be sent.

3. The method of claim 1, wherein the transmitting device punctures a sequence of bits in the encoded data according to the length of the punctured bits, comprising:

and the sending equipment performs punching processing on the bit sequence in the coded data by adopting a preset interval, wherein the preset interval is determined according to the length of the punctured bits.

4. The method of claim 1, wherein prior to the transmitting device encoding the data for transmission, further comprising:

and the sending equipment adds a cyclic redundancy check code to the data to be sent.

5. The method of claim 1, after obtaining the processed data, further comprising:

and the sending equipment modulates the processed data by adopting four-phase shift keying.

6. A data encoding apparatus, comprising:

the processing unit is used for coding data to be sent;

the processing unit is used for determining the length of the puncturing bits according to the length of the coded data and a preset length;

7. The apparatus of claim 6, wherein the processing unit is configured to encode the data for transmission using Turbo coding when the data for transmission is encoded.

8. The apparatus of claim 6, wherein the processing unit is configured to perform puncturing on the bit sequence in the encoded data at a preset interval when performing puncturing on the bit sequence in the encoded data according to the length of the punctured bits, and wherein the preset interval is determined according to the length of the punctured bits.

9. The apparatus of claim 6, wherein the processing unit is configured to add a cyclic redundancy check code to the data for transmission before encoding the data for transmission.

10. The apparatus of claim 6, wherein the processing unit is configured to modulate the processed data using quadrature phase shift keying after obtaining the processed data.

11. A data encoding device comprising a processor and interface circuitry for receiving signals from or transmitting signals to the processor from a device other than the device, the processor being arranged to implement the method of any of claims 1 to 5 by means of logic circuitry or executing code instructions.

12. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 5.