RU2782241C1 - Data transmission method and communication device - Google Patents

Abstract

FIELD: communication.

SUBSTANCE: invention discloses a data transmission method and a communication device. A method is proposed, which contains stages, at which, by means of the first communication device, a target data transmission mode is determined, where the target data transmission mode is used for indication of a number of transmission cases, when the first communication device transmits an encoded bit combination to the second communication device, and the encoded bit combination is transmitted every time, wherein the encoded bit combination may contain one encoded bit sequence or a set of encoded bit sequences, and the encoded bit sequence is obtained by encoding of all or part of K information bits; and, by means of the first communication device, the encoded bit combination is sent to the second communication device in the target data transmission mode, by means of the second communication device, the encoded bit combination is received, sent by the first communication device, and the encoded bit sequence contained in the encoded bit combination is decoded.

EFFECT: increase in the efficiency of satellite communication.

44 cl, 10 dwg

Description

The technical field to which the invention belongs

The present application relates to the field of wireless communication technologies and, in particular, to a data transmission method and a communication device.

State of the art

A satellite base station is capable of providing a wider coverage area and is immune to natural disasters or outside forces. If satellite communications are introduced into future 5G communications to improve the reliability of 5G communications, communications services can be provided for some areas that cannot be covered by terrestrial communications networks, such as oceans and forests. In this way, for example, better communication services can be provided to aircraft, trains and users on these vehicles. For 5G communication, more data resources are provided to improve the network transmission speed. Therefore, supporting both ground and satellite is the inevitable trend of the future 5G communication, and such communication has great advantages in terms of wide coverage, reliability, multi-connection, high performance, etc.

At present, satellite communications and terrestrial communications are significantly different in terms of communication protocol. A conventional terminal, such as a mobile phone, can only maintain basic communication with a terrestrial base station, and only a dedicated satellite mobile phone can communicate with a satellite. With 5G communications, the satellite communications process must be redesigned so that the satellite communications process can be integrated with existing terrestrial communications and does not add much cost or complexity to the terminal. During communication, the terminal only needs to select the desired base station based on the respective requirement.

In order to improve communication reliability, in the existing long term evolution (LTE) network, a relatively complex hybrid automatic repeat request (HARQ) mechanism is provided to transmit a signal many times until the receiving end successfully performs decoding or until the maximum number of retransmissions is reached. Specifically, during channel coding, a plurality of coded redundant versions are generated, and a redundant version different from the previous redundant version is sent on each retransmission. The redundant version here means that part of the encoded data is combined at the receiving end to improve decoding performance. However, since satellite communication is generally characterized by a long transmission range and a large delay, if the HARQ mechanism in LTE is continued, the delay will increase significantly, which will adversely affect the communication efficiency. Currently, some satellite communication systems do not directly support the HARQ mechanism in order to reduce the delay. However, as satellite communications and terrestrial communications are being integrated and users are placing higher and higher reliability requirements on data transmission, a new transmission mechanism needs to be considered to be applicable to satellite communications. Therefore, how to develop a data transmission method applicable to satellite communication in order to improve the efficiency of satellite communication is a technical problem to be solved at present.

The essence of the invention

The present application provides a communication method and a communication device so that the communication mode can be adaptively selected and the applicability is wider. This applies not only to a terrestrial base station, but also to satellite communications, and can guarantee both the reliability of communications and the efficiency of message transmission.

According to the first approach, an embodiment of the present application provides a data transmission method applied on the side of the first communication device. The method comprises the steps of: determining, by means of the first communication device, a target communication mode, wherein the target communication mode is used to indicate the number of times the first communication device transmits a coded bit pattern to a second communication device, and the coded bit pattern is transmitted each time the coded bit pattern is , transmitted each time, contains one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or some of the K information bits and K is a positive integer; and sending, by means of the first communication device, the encoded bit pattern to the second communication device in the target communication mode.

In accordance with this embodiment of the present application, the first communication device sends the encoded bit pattern to the second communication device in the target communication mode. The target communication mode may be used to indicate the number of times the first communication device transmits the coded bit pattern to the second communication device and the coded bit pattern is transmitted each time. Therefore, in this embodiment of the present application, the communication mode can be adaptively selected and the applicability is wider. This is not only applicable to a terrestrial base station, but also applicable to satellite communications, and can guarantee high reliability and high communication efficiency at the same time.

In an exemplary construction, the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time contains at least two encoded bit sequences. In accordance with this embodiment of the present application, in one transmission process, at least two encoded bit sequences may be combined and sent. This improves the decoding success rate.

In an exemplary construction, when the encoded bit pattern transmitted each time contains a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits out of the K information bits.

In an optional construction, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels; where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels to which the P information bits have been converted and sorted based on reliability; when the Q information bits are encoded using the polar code to obtain the second coded bit sequence, the Q information bits are converted to the first Q polarized channels among the P polarized channels, which are sorted based on reliability; where Q is a positive integer less than or equal to P. According to this embodiment of the present application, the Q information bits corresponding to the last Q polarized channels, which are sorted based on reliability, are mapped to the first Q polarized channels out of the P polarized channels, which are sorted based on reliability. This can guarantee the decoding success rate of each information bit.

With a possible construction, Q information bits are converted in ascending order of reliability into Q polarized channels with reliability in descending order; or Q information bits are mapped in decreasing order of reliability into Q polarized channels with decreasing reliability.

In an optional construction, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, wherein the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels; where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; Q information bits are information bits corresponding to the last Q polarized channels, into which P information bits are converted and sorted based on code distance and reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are converted to first Q polarized channels from among the P polarized channels, which are sorted based on code distance and reliability; where Q is a positive integer less than or equal to P. According to this embodiment of the present application, a decoding success rate of each information bit can be provided.

In a possible construction, Q information bits are converted in ascending order of code distance and reliability into Q polarized channels in which code distances and reliability are in descending order; or Q information bits are mapped in descending order of code distance and reliability into Q polarized channels in which code distances and reliability are in descending order.

Optionally, the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; before the first communication device determines the target data transfer mode, the method further comprises: obtaining by the first communication device a first index sent by the second communication device, where the first index is determined by the second communication device based on the network device attribute information and/or the channel quality between the first communication device and the second communication device, wherein the attribute information comprises one or more of the following: network device type, distance between the first communication device and the second communication device, or height of the network device above the ground, and the type comprises a terrestrial base station or a space base station; and determining, by the first communication device, a target data transfer mode comprising: determining, by the first communication device, a target data transfer mode based on the first index and a given lookup table, where the given lookup table contains a lookup relation between at least one index and at least one mode data transfer, and this at least one index contains the first index and at least one data transfer mode contains the target data transfer mode.

Optionally, the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and determining by the first communication device the target communication mode comprises: determining, by the first communication device, the target communication mode based on the attribute information of the network device and/or the channel quality between the first communication device and the second communication device, where the attribute information comprises one or more of the following: a network device type, a distance between the first communication device and a second communication device, or a height of the network device above the ground, and the type comprises a terrestrial base station or a space base station. According to this embodiment of the present application, compared with the method in which the network device determines the target data transmission mode, the method in this embodiment of the present application can reduce signaling overhead and improve transmission efficiency.

In an exemplary construction, the number which is equal to the number of coded bit pattern transmissions and which corresponds to the space base station is less than or equal to the number of coded bit pattern transmissions and which corresponds to the terrestrial base station; and/or a number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time and which corresponds to the space base station is greater than or equal to the number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time , and which corresponds to a terrestrial base station.

In a possible construction, at least two of the plurality of coded bit sequences contained in the same coded bit pattern have different code rates.

According to the second approach, an embodiment of the present application provides a data transmission method applied to the second communication device side. The method comprises the steps of: receiving, by means of a second communication device, a coded bit pattern sent by the first communication device in a target data mode, where the target data mode is used to indicate the number of transmissions in which the first communication device transmits the coded bit pattern to the second communication device and an encoded bit pattern transmitted each time, wherein the encoded bit pattern transmitted each time comprises one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or some of the K information bits, where K is a positive integer ; and decoding, by means of the second communication device, the received coded bit pattern to obtain a decoded bit sequence.

According to this embodiment of the present application, the communication mode can be selected adaptively and the applicability is wider. This is not only applicable to a terrestrial base station, but also applicable to satellite communications, and can guarantee both the reliability of communications and the efficiency of message transmission.

In an exemplary construction, the coded bit pattern in at least one coded bit pattern transmission transmitted each time contains at least two coded bit sequences. In accordance with this embodiment of the present application, at least two encoded bit sequences can be combined and sent in a single transmission process. This improves the decoding success rate.

In an exemplary construction, when the encoded bit pattern transmitted each time contains a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits out of the K information bits.

In an optional construction, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels into which P information bits are converted and sorted based on reliability; then, when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on reliability, where Q is a positive integer less than or equal to P. According to this embodiment of the present application, a decoding success rate for each information bit can be provided.

With a possible construction, Q information bits are converted with increasing order of reliability into Q polarized channels with reliability in descending order; or Q information bits are mapped with decreasing order of reliability into Q polarized channels with decreasing reliability.

In an optional construction, an encoded bit sequence is obtained by performing an encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels, into which the P information bits are converted and sorted based on code distance and reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on code distance and reliability, where Q is a positive integer less than or equal to P.

In a possible construction, Q information bits are converted in ascending order of code distance and reliability into Q polarized channels with code distances and reliability in descending order; or Q information bits are mapped in descending order of code distance and reliability into Q polarized channels with code distances and reliability in descending order.

Optionally, the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and before receiving by the second communication device the encoded bit pattern sent by the first communication device in the target communication mode, the method further comprises: sending by the second communication device a first index to the first communication device, where the first index is used by the first communication device to determine the target the data transfer mode, wherein the first index is determined by the second communication device based on the attribute information of the network device and/or the channel quality between the first communication device and the second communication device, and the attribute information contains one or more of the following: network device type, distance between the first the communication device and the second communication device or the height of the network device above the ground and the type comprises a terrestrial base station or a space base station.

In an exemplary design, the target communication mode is determined by the first communication device based on the network device attribute information and/or the channel quality between the first communication device and the second communication device, the attribute information comprising one or more of the following: network device type, distance between the first device communication device and the second communication device or the height of the network device above the ground and the type contains a terrestrial base station or a space base station.

In an exemplary construction, the number which is the number of transmissions of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of transmissions of the coded bit pattern and which corresponds to the terrestrial base station; and/or a number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and which corresponds to the space base station, is greater than or equal to the number of coded bit sequences contained in the coded bit pattern transmitted each time, and which corresponds to ground base station.

In a possible construction, at least two of the plurality of coded bit sequences contained in the same coded bit pattern have different code rates.

According to a third approach, an embodiment of the present application provides a communication device. The communication device is the first communication device. The first communication device may comprise a plurality of functional modules or blocks configured to suitably execute the data transmission method presented in the first approach or possible implementations of the first approach.

According to the fourth approach, an embodiment of the present application provides another communication device. The communication device is the second communication device. The second communication device may comprise a plurality of functional modules or blocks configured to suitably execute the data transmission method provided in the second approach or possible implementations of the second approach.

According to the fifth approach, an embodiment of the present application provides a communication device capable of implementing the data transmission method described in the first approach. The communication device is the first communication device. The first communication device may include a memory and a processor, a transmitter and a receiver that are associated with the memory. The transmitter is configured to support the first communication device while performing the step of sending information by the first communication device according to the data transmission method presented in the first approach. The receiver is configured to support the first communication device while performing the step of receiving information by the first communication device according to the data transmission method presented in the first approach. The processor is configured to support the first communication device in performing processing steps other than the steps of sending and receiving information by the first communication device according to the data transmission method presented in the first approach. It should be noted that the transmitter and receiver in this embodiment of the present application may be integrated or may be coupled using a connector. The memory is configured to store a control program for implementing the data transfer method described in the first approach. The processor is configured to execute the control program stored in the memory, that is, to execute the method provided in the first approach or possible implementations of the first approach. The memory and processor may be integrated or may be linked via a communication unit.

According to the sixth approach, an embodiment of the present application provides another communication device capable of implementing the data transmission method described in the second approach. The communication device is the second communication device. The second communication device may include a memory, a processor, a transmitter, and a receiver associated with the memory. The transmitter is configured to support the second communication device in the step of sending information by the second communication device in the data transmission method provided in the second approach. The receiver is configured to support the second communication device in the step of receiving information by the second communication device in the data transmission method provided in the second approach. The processor is configured to support the second communication device in performing processing steps other than sending and receiving information by the second communication device in the data transmission method provided by the second approach. It should be noted that the transmitter and receiver in this embodiment of the present application may be integrated or may be coupled using a communication unit. The memory is configured to store a control program for implementing the data transmission method described in the second approach. The processor is configured to execute the control program stored in the memory, that is, to execute the method provided by the second approach or possible implementations of the second approach. The memory and processor may be integrated or may be linked using a connector.

In this embodiment of the present application, the communication device may also be referred to as a communication device.

According to the seventh approach, an embodiment of the present application provides a communication system comprising a first communication device and a second communication device. The first communication device may be the first communication device described in the third approach or the fifth approach, and the second communication device may be the second communication device described in the fourth approach or sixth approach.

According to the eighth approach, an embodiment of the present application provides a computer-readable medium. Readable media stores instructions. When executing commands on the computer, the computer is capable of performing the data transfer method described in the first approach.

According to the ninth approach, an embodiment of the present application provides another machine-readable medium. Readable media stores instructions. When the commands are executed on the computer, the computer is capable of performing the data transfer method described in the second approach.

According to the tenth approach, an embodiment of the present application provides a computer program product containing instructions. When the computer program product is running on the computer, the computer is capable of performing the data transfer method described in the first approach.

According to the eleventh approach, an embodiment of the present application provides another computer program product containing instructions. When the computer program product is running on the computer, the computer is capable of performing the data transfer method described in the second approach.

According to the twelfth approach, an embodiment of the present application provides a communication chip. The communication chip may include a processor and one or more interfaces associated with the processor. The processor may be configured to recall the program memory to implement the data transfer method provided by the first approach or possible implementations of the first approach and execute the instructions contained in the program. The interface may be configured to output the result of processing performed by the processor.

According to the thirteenth approach, an embodiment of the present application provides a communication chip. The communications chip may include a processor and one or more interfaces associated with the processor. The processor may be configured to recall a program from memory to implement the data transfer method provided by the first approach or possible implementations of the first approach and execute the instructions contained in the program. The interface may be configured to output the result of processing performed by the processor.

Brief description of the drawings

In order to more clearly describe the technical solutions presented in the embodiments of the present application or the prior art, the accompanying drawings required to describe the embodiments of the present application or the prior art are briefly described below.

Fig. 1 - a communication system corresponding to an embodiment of the present application;

fig. 2 is a hardware architecture of a terminal device according to an embodiment of the present application;

fig. 3 is a hardware architecture of a network device according to an embodiment of the present application;

fig. 4 is a diagram for converting an information bit into a polarized channel in accordance with an embodiment of the present application;

fig. 5 shows another scheme for converting an information bit into a polarized channel according to an embodiment of the present application;

fig. 6 shows another scheme for converting an information bit into a polarized channel according to an embodiment of the present application;

fig. 7 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 8 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 9 is a block diagram of a first communication device and a second communication device according to an embodiment of the present application; and

fig. 10 is a block diagram of a communication chip according to an embodiment of the present application.

Description of Embodiments

The embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application.

In FIG. 1 shows a communication system according to an embodiment of the present application. Communication system 100 may include at least one network device 101 (only one shown) and one or more terminal devices 102 connected to network device 101.

Network device 101 may communicate wirelessly with terminal device 102 using one or more antennas. Each network device 101 is capable of providing communication coverage of the coverage area 103 corresponding to the network device 101. The coverage area 103 corresponding to the network device 101 may be divided into a plurality of sectors (sector). One sector corresponds to some part of the coverage area (not shown).

In this embodiment of the present application, the network device 101 may be a terrestrial base station or a space base station. The space base station may be of various types, including but not limited to: a high-altitude base station (for example, a high-altitude station platform that can implement the function of a base station, such as a balloon or an unmanned aerial vehicle), or a satellite (including low orbit satellite, medium orbit satellite and high orbit satellite).

The network device 101 includes, but is not limited to, an evolved NodeB (evolved NodeB, eNodeB), a base station in a fifth generation (5G) communication system, a base station or network device in a future communication system, and an access node in the system. wireless local area network ((wireless fidelity, WiFi).

In this embodiment of the present application, terminal device 102 is a device having a wireless transceiver function and can be deployed on the ground, including as an indoor or outdoor device, a handheld device, a wearable device, or a vehicle-mounted device. Terminal 102 may also be deployed in water (eg, on a ship) or in the air (eg, in an airplane or balloon). The end device can be a mobile phone (mobile phone), a tablet computer (Pad), a laptop computer, a computer with a wireless transceiver function, a virtual reality (VR) end device, an augmented reality (AR) end device, a wireless end device a device for automatic control of a car (self driving), a wireless terminal device in telemedicine (remote medical), a wireless terminal device in a smart network (smart grid), a wireless terminal device in a transport safety system, a wireless terminal device in a smart smart city, smart car, smart home wireless terminal, etc. The application scenario is not limited to this embodiment of the present application. Sometimes, a terminal may also be referred to as user equipment (UE), terminal, access terminal, UE, UE station, mobile device, mobile station, mobile station, mobile terminal, mobile client, mobile unit, remote station, remote terminal device, remote unit, wireless unit, wireless device, user agent, user device, and the like.

It should be noted that the terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Many" means two or more. From this point of view, in the embodiments of the present application, "many" can also be understood as "at least two". The term "and/or" describes a relationship relationship for describing related objects and represents that three relationships can exist. For example, A and/or B can represent the following three cases: only A exists, A and B exist, and only B exists. In addition, unless otherwise specified, the "/" character typically indicates an "or" relationship between related entities.

In FIG. 2 shows a terminal provided in an embodiment of the present application. As shown in FIG. 2, the terminal device 200 may include an input and output module (including an audio input and output module 218, a key input module 216, a display 220, and the like), a user interface 202, one or more processors 204, a transmitter 206, a receiver 208 , connector 210, antenna 214, and memory 212. These components may be connected using a bus or other means. In FIG. 2 shows an example in which the components are connected using a bus.

Antenna 214 may be configured to convert electromagnetic energy into an electromagnetic wave in free space, or convert an electromagnetic wave in free space into electromagnetic energy in a transmission line. Connector 210 is configured to split the mobile communication signal received by antenna 214 into a plurality of signals and distribute the plurality of signals to a plurality of receivers 208.

The transmitter 206 may be configured to perform a process of transmitting a signal from the output of the processor 204.

Receiver 208 may be configured to perform a process of receiving a mobile communication signal received by antenna 214.

In this embodiment of the present application, transmitter 206 and receiver 208 can be considered as a wireless modem. Terminal 200 may include one or more transmitters 206 and one or more receivers 208.

In addition to the transmitter 206 and receiver 208 shown in FIG. 2, terminal device 200 may further comprise another communication component, such as a GPS module, a Bluetooth module, or a wireless Internet (wireless fidelity, Wi-Fi) module. Without being limited to a prior wireless communication signal, tag 200 may additionally support another wireless communication signal, such as a satellite signal or a shortwave signal. Without being limited to wireless communications, terminal device 200, if provided with a wired network interface 201 (eg, LAN interface), may additionally support wired communications.

The input/output module may be configured to implement the interaction between the terminal device 200 and the user/external environment, and may mainly include an audio input and output module 218, a key input module 216, a display 220, and the like. Specifically, the I/O module may further comprise a camera, a touch screen, a sensor, or the like. All I/O modules communicate with the processor 204 using the user interface 202 .

Memory 212 may be coupled to processor 204 using a bus or I/O port, or memory 212 may be integrated with processor 204. Memory 212 is configured to store various programs and/or multiple groups of instructions. Specifically, memory 212 may include high speed RAM, and may also include non-volatile memory, such as one or more magnetic disk storage devices, a flash memory device, or other non-volatile solid state storage device. The memory 212 may store an operating system (referred to below as a system), such as an embedded operating system such as Android, iOS, Windows, or Linux. The memory 212 may additionally store a network communication program. The network communication program may be used to communicate with one or more accessory devices, one or more terminal devices, and one or more network devices. Memory 212 may additionally store a user interface program. The user interface program can vividly display the content of the application program on the screen using the graphic operation window and receive, using an input control such as a menu, dialog box, or keyboard, a control operation performed by the user in the application program.

In this embodiment of the present application, the memory 212 may be configured to store a program for implementing on the side of the terminal device 200 the data transmission method presented in one or more embodiments of the present application. To implement the data transmission method provided in one or more embodiments of the present application, refer to the following embodiments.

The processor 204 may be configured to read and execute computer-readable instructions. Specifically, the processor 204 may be configured to call a program stored in the memory 212, such as a program for implementing on the side of the terminal device 200 the data communication method presented in one or more embodiments of the present application, and executing the instructions contained in the program to implement the methods presented in the following embodiments. The processor 204 may be supported by one or more of the global system for mobile communications (GSM, 2G), a wideband code division multiple access (WCDMA, 3G) communications system, a long-term evolution communications system ( long term evolution, LTE, 4G) , 5G communication system, future evolving communication system, etc. Alternatively, processor 204 controls or controls transmitter 206 to send any message or data. Alternatively, processor 204 specifically controls or controls receiver 208 to receive any message or data. Therefore, the processor 204 can be considered as the control center for performing the transmission or reception, and the transmitter 206 and receiver 208 are the specific executors of the transmission and reception operations.

It should be understood that terminal 200 may be terminal 102 in communication system 100 shown in FIG. 1 and can be implemented as a user equipment (UE), a terminal, an access terminal, a UE, a UE, a mobile device, a mobile station, a mobile station, a mobile terminal, etc. .P.

It should be noted that terminal 200 shown in FIG. 2 is merely an implementation of the embodiments of the present application and, in actual use, terminal device 200 may further comprise more or fewer components. This is not limited here.

In FIG. 3 shows a network device provided in an embodiment of the present application. As shown in FIG. 3, network device 300 may include one or more processors 301, memory 302, network interface 303, transmitter 305, receiver 306, connector 307, and antenna 308. These components may be connected using a bus 304 or otherwise. In FIG. 3 uses an example in which the components are connected via a bus.

Network interface 303 may be used by network device 300 to communicate with another communications device, such as another network device. Specifically, the network interface 303 may be a wired interface.

Transmitter 305 may be configured to perform a transmission process, such as signal modulation, on the signal output from processor 301. Receiver 306 may be configured to perform a reception process, such as signal demodulation, on a mobile signal received by antenna 308. In some embodiments of the present application, the transmitter 305 and receiver 306 can be considered as a wireless modem. Network device 300 may include one or more transmitters 305 and one or more receivers 306. Antenna 308 may be configured to convert electromagnetic energy present in a transmission line into an electromagnetic wave in free space, or convert an electromagnetic wave in free space into electromagnetic energy, coming into the transmission line. Connector 307 may be configured to split the mobile communication signal into a plurality of signals and distribute the plurality of signals to a plurality of receivers 306.

Memory 302 may be coupled to processor 301 using bus 304 or an I/O port, or memory 302 may be integrated with processor 301. Memory 302 is configured to store various programs and/or multiple groups of instructions. Specifically, the memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, a flash memory device, or other non-volatile solid state storage device. Memory 302 may store an operating system (hereinafter referred to as a system), such as an embedded operating system such as uCOS, VxWorks, or RTLinux. The memory 302 may additionally store a network communication program. The network communication program may be used to communicate with one or more accessory devices, one or more terminal devices, and one or more network devices.

In this embodiment of the present application, the processor 301 may be configured to read and execute computer-readable instructions. Specifically, the processor 301 may be configured to call a program stored in the memory 302, such as a program that implements on the side of the network device 300 the communication method provided in one or more embodiments of the present application, and executes the instructions contained in the program.

It should be understood that the network device 300 may be the network device 101 in the communication system 100 shown in FIG. 1, and can be implemented as a base station, wireless transceiver, basic service set (BSS), extended service set (ESS), gNB, etc.

It should be noted that the network device 300 shown in FIG. 3 is merely an implementation of the embodiments of the present application, and in actual use, the network device 300 may further comprise more or fewer components. This is not limited here.

First, the inventive concept of the present application is described. Satellite communications are typically characterized by long transmission range and high latency. If LTE continues to use the HARQ mechanism, the delay increases significantly and communication performance is significantly affected. Currently, some satellite communication systems do not directly support the HARQ mechanism in order to reduce delay. However, as satellite communications and terrestrial communications are being integrated and the user has an increasingly increasing requirement for the reliability of transmitted data, it is necessary to consider a new transmission mechanism and an appropriate channel coding scheme. The polar code is being introduced into the 5G standard as a new code. The polar code is highly reliable and will inevitably become one of the preferred channel coding schemes in future satellite communications. For a terrestrial base station, the polar code is used on the control channel and is not associated with HARQ. The corresponding coding technology is also available for the conventional HARQ method. However, for satellite communications, in order to balance delay and reliability, no coding scheme associated with the polar code is currently available. In this application, in order to avoid a large delay in satellite communication, an existing coding scheme based on a polar code is improved to improve satellite communication efficiency. In this application, different versions of the polar coding are combined and sent based on the type of base station or even the distance between the satellite base station and the earth. The polar coded versions can be properly designed and combined based on the quality of the satellite link, the type of base station, and the like.

и процессом кодирования, основанным на полярном коде, является

.

является вектором двоичной строки и длина равна N (а именно, кодовая длина).

является матрицей N×N, и

, где

и

определяются как произведение Кронекера (Kronecker)

матриц F₂.The polar code is a linear block code. The polar code generator matrix is

and the encoding process based on the polar code is

.

is a binary string vector and the length is N (namely, the code length).

is an N×N matrix, and

, where

and

are defined as the product of Kronecker (Kronecker)

matrices F ₂ .

используются для переноса информации и упоминаются как информационные биты, и набор индексов этих битов обозначается как I; другие биты устанавливаются на фиксированные значения, которые заранее согласуются между передающим концом и приемным концом и упоминаются как фиксированные биты, и набор индексов этих битов обозначается комплиментарным

для I.All of the above, related to the operations of addition and multiplication, are completely operations of addition and multiplication in the binary Galois Field. In the coding process based on the polar code, some bits in

are used to carry information and are referred to as information bits, and the index set of these bits is referred to as I; the other bits are set to fixed values that are agreed in advance between the transmitting end and the receiving end and are referred to as fixed bits, and the index set of these bits is denoted by complementary

for i.

In the present application, the encoded version can be understood as an encoded bit sequence that is obtained by encoding all or part of the K information bits (K is a positive integer) using a polar code. An encoded bit pattern may be understood as a set of one or more encoded bit sequences transmitted at one time. For example, K is 16 and K information bits are u1-u16. The first encoded bit sequence may be a bit sequence obtained by encoding 16 information bits u1-u16 using a polar code, a second encoded bit sequence may be obtained by encoding eight information bits u9-u16 using a polar code, and a third encoded bit sequence may be obtained , encoding the four information bits u7, u8, u15 and u16 using a polar code. The final transmitter may combine the three encoded bit sequences and send them to the final receiver in one transmission. In this case, the first encoded bit sequence, the second encoded bit sequence, and the third encoded bit sequence are an encoded bit pattern. Alternatively, the transmitting end device may send the first encoded bit sequence to the receiving end device in the first transmission process, and combine the second encoded bit sequence and the third encoded bit sequence and send them to the receiving end device in the second transmission process. Of course, the transmitter end device may alternatively send the first coded bit sequence to the receiver end device in the first transmission process, send the second coded bit sequence to the receiver end device in the second transmission process, and send the third coded bit sequence to the receiver end device in the third transmission process. The receiving end device may decode the received three encoded bit sequences to recover the 16 information bits u1-u16.

It should be noted that when information bits among the K information bits are encoded, the code lengths used at different encoding times may be the same or may be different. The code rates used at different coding times may be the same or may be different. This is not limited in the present application. For example, the first encoded bit sequence is a bit sequence obtained by encoding 16 information bits u1-u16 using a polar code, and the code rate used is 1/2. In other words, the number of information bits is 16 and the code length N is 32. The second coded bit sequence is obtained by encoding eight information bits u9-u16 using a polar code, and the code rate used is 1/4. In other words, the number of information bits is 8 and the code length N is 32. A third coded bit sequence is obtained by encoding these four information bits u7, u8, u15 and u16 using a polar code, and the code rate used is 1/8. In other words, the number of information bits is 4 and the code length N is 32. In this example, description is presented using an example in which code lengths used at different coding times are the same and code rates used at different coding times are different.

As another example, the first encoded bit sequence is a bit sequence obtained by encoding 16 information bits u1-u16 using a polar code, and the code rate used is 1/2. In other words, the number of information bits is 16 and the code length is 32. The second coded bit sequence is obtained by encoding eight information bits u9-u16 using a polar code, and the code rate used is 1/2. In other words, the number of information bits is 8 and the code length is 16. A third coded bit sequence is obtained by encoding four information bits u7, u8, u15 and u16 using a polar code, and the code rate is 1/2. In other words, the number of information bits is 4 and the code length is 8. In this example, description is provided using an example in which code lengths used at different coding times are different and code rates used at different coding times are the same.

As another example, the first encoded bit sequence is a bit sequence obtained by encoding 16 information bits u1-u16 using a polar code, and the code rate when used is 1/2. In other words, the number of information bits is 16 and the code length is 32. The second encoded bit sequence is obtained by encoding eight information bits u9-u16 using a polar code, and the code rate when used is 1/6. In other words, the number of information bits is 8 and the code length is 48. The third coded bit sequence is obtained by encoding four information bits u7, u8, u15 and u16 using a polar code and the code rate when used is 1/18. In other words, the number of information bits is 4 and the code length is 72. In this example, description is presented using an example in which code lengths used at different coding times are different and code rates used at different coding times are also different.

In other words, when the code lengths used at different coding times are the same, the code rates used at different coding times may be different. When the code lengths used at different coding times are different, the code rates used at different coding times may be the same or may be different.

It should be understood that when the code lengths used at different coding times are equal, the code rate may also represent the ratio between the numbers of information bits selected at different coding times. For example, the first encoding is to encode 16 information bits u1-u16 using a polar code, the code length is N, and the code rate in use is R. The code length used in the second encoding is also N and the code rate is R/2. Therefore, it can be understood that the number of information bits in the second encoding is 8. The code length used in the third encoding is also N, and the code rate is R/4. Therefore, it can be understood that the number of information bits in the third encoding is 4.

It should be understood that when the code rates used at different coding times are the same, the code length may also represent the ratio between the numbers of information bits selected at different coding times. For example, the first encoding is to encode 16 information bits u1-u16 using a polar code, the code length is N and the code rate in use is R. The code rate used in the second encoding is also R and the code length is R/2. Therefore, it can be understood that the number of information bits in the second encoding is 8. The code rate used in the third encoding is also R and the code length is N/4. Therefore, it can be understood that the number of information bits in the third encoding is 4.

It should be noted that when information bits of the K information bits are encoded, the information bits used at different encoding times may be the same or may be different. When the information bits used at different encoding times differ, in order to select the information bit used in each encoding, the present application provides the following several methods for selecting information bits.

Method 1: The information bit to be encoded each time is selected based on the reliability of the polarized channel.

The polar code contains N polarized channels, the reliability of which is polarized. To be specific, the reliability of some channels tends to be 1 and the reliability of other channels tends to be 0. During encoding, the information bit must be placed in a relatively high reliability location, and the fixed bit is placed in any other remaining location. As shown in FIG. 4, the information bits are 16 bits u1-u16 and the code length is 32. To be specific, there are 32 polarized channels, and the polarized channels are arranged from left to right in descending order of reliability. In order to improve transmission reliability, the transmitting end sequentially allocates 16 information bits u1-u16 in the first 16 highly reliable polarized channels out of the 32 polarized channels. If the encoded bit pattern sent by the transmitting end to the receiving end contains a plurality of encoded bit sequences, the information bit used in each encoding may be selected based on the reliability of the polarized channels.

, кодовая длина N равна 32, количество K информационных битов равно 16 и информационными битами являются биты u1-u16.As shown in FIG. 4, it is assumed that, for a coded bit pattern transmitted at one time, the code rate is

, the code length N is 32, the number K of information bits is 16, and the information bits are bits u1-u16.

The polarized channels are arranged from left to right in descending order of reliability and the first 16 polarized channels are used for information bits. The reliability of the polarized channel also reflects the probability of the corresponding information bit error occurring during decoding, i.e., lower polarized channel reliability indicates a higher probability of the corresponding information bit error occurring during decoding. Therefore, in the present application, a coding scheme is designed using such a polar code feature. Details are shown in FIG. 4. For each encoding, an information bit with relatively low reliability during the previous transmission or encoding is selected, and the information bit is placed in a relatively high reliability location for encoding. For example, as shown in FIG. 4, the information bits prone to error in the first encoding are u9-u16. In the second encoding, bits u9-u16 are placed on eight polarized channels with the highest reliability for encoding. After the second decoding, the relatively low reliability information bits are u7, u8, u15 and u16. In the third encoding, these information bits are placed on four polarized channels with the highest reliability for encoding. After the third decoding, the relatively low reliability information bits are u5, u6, u13 and u14. In the fourth encoding, these information bits are placed on four polarized channels with the highest reliability for encoding. Encoding in this way can guarantee relatively high reliability for all information bits, thereby improving transmission reliability.

In the encoding method shown in FIG. 4, it is assumed that a hard replacement method is used for decoding. That is, the information bit decoded each time is independent, and the reliability of the information bit decoded each time is only related to the reliability of the corresponding polarized channel in the current encoding. If all results for multiple decoding times are considered, the reliability of the information bits can be updated in a combinational manner. A method in which decoding and encoding are performed in a combinational manner will be described with reference to FIG. 5.

, кодовая длина N равна 32, количество K информационных битов равно 16 и информационными битами являются u1-u16.As shown in FIG. 5, it is assumed that for a coded bit pattern transmitted at one time, the code rate is

, the code length N is 32, the number K of information bits is 16, and the information bits are u1-u16.

The 32 polarized channels are arranged in descending order of reliability. The reliability of the 16 polarized channels with the highest reliability is assumed to be 16, 15, 14, 13, 12... and 1, respectively. In the first encoding, 16 information bits are placed on 16 polarized channels with the highest reliability. In the second encoding, information bits u9-u16 with relatively low reliability are selected and placed in ascending order of information bit reliability on eight polarized channels with the highest reliability in the current encoding. The result of the second decoding and the previous decoding result are combined, that is, the reliability of u9-u16 at the second decoding is updated to 8+9, 7+10, 6+11, 5+12, 4+13, 3+14, 2+15 and 1+ 16, respectively. In the third encoding, information bits u5-u8 with relatively low reliability are selected and placed in ascending order of information bit reliability on the four polarized channels with the highest reliability in the current encoding. The reliability of u5-u8 is updated to 12+13, 11+14, 10+15 and 9+16, respectively.

Method 2: The information bit to be encoded each time is selected based on the reliability and code distance of the polarized channel.

When a polar code is used to decode an information bit, the error probability is related to the reliability of the polarized channel, and the code distance also somewhat affects the decoding performance, which is the same as when another code is used. Therefore, the information bit selected in each encoding can also be determined based on both the code distance and the reliability of the polarized channel. The code distance of a polar code is not unique. With reference to FIG. 6, it is assumed that the 16 channels with the largest code distance are selected from the 32 polarized channels to carry information bits u1-u16 with respective code distances of 32, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, and 8, respectively, and with corresponding reliability of 32, 25, 26, 24, 30, 31, 6, 11, 13, 21, 14, 22, 27, 29, 16, and 28, respectively.

.It is assumed that the code rate of the encoded bit pattern transmitted at one time is

.

In the second encoding, the eight information bits with the shortest code distance are selected. Since the code distances of the 10 information bits u7-u16 are the same, the eight bits with the lowest reliability, namely u7, u8, u9, u10, u11, u12, u13, and u15, are selected and placed on the eight polarized channels with the largest code distance. and highest reliability, with corresponding code distances updated to 32, 16, 16, 16, 16, 16, 16, 8, and 8, respectively, and with corresponding reliability updated to 32, 25, 26, 24, 30, 31 , 29 and 28, respectively. In other words, the code distances u1-u16 are 32, 16, 16, 16, 16, 16, 32, 16, 16, 16, 16, 16, 8, 8, 8, and 8, respectively, and the reliability of u1-u16 is 32, 25, 26, 24, 30, 31, 32, 25, 26, 24, 30, 31, 29, 29, 28 and 28, respectively. In the third encoding, the four information bits u13-u16 with the shortest code distance are selected and placed at the locations with the largest code distance and highest reliability, with the respective code distances updated to 32, 16, 16, and 16, respectively, and with the corresponding polarized reliability. channels 32, 26, 30 and 31, respectively.

Of course, the information bits used in each encoding may be wholly or partly the same. This is not limited in the present application.

It should be noted that the reliability of the polarized channel in the present application may not be the real reliability, but the value obtained after the real reliability is normalized. The value may represent a relative reliability value.

The preceding several coding schemes may be performed in the same manner for different combinations of code rates and also apply to other embodiments.

It should be noted that if the information bits used repeatedly in encoding are the same, the code rates used at different encoding times may be the same or may be different. In addition, if the information bits used at multiple coding times are the same, the code lengths used at different coding times may be the same or may be different.

When the information bits (eg, K information bits) used at different coding times are the same, the relative locations of the information bits at different coding times can be determined in an interleaved manner and mapped to K polarized channels with high reliability and/or large code distance.

In multiple encoding, the information bits used in at least two coding cases may be the same, or the information bits used in at least two coding cases may be different. For example, the first encoding should encode 16 information bits u1-u16 using a polar code, the code length is N and the code rate is R. The second encoding should also encode 16 information bits u1-u16 using a polar code, the code length when used is N/ 2 and the code rate is 2R. The third encoding is to encode eight information bits u9-u16 using a polar code, the code length when used is N and the code rate is also R/2.

Based on the embodiments respectively related to communication system 100, terminal device 200, and network device 300, an embodiment of the present application provides a method for transmitting data. With reference to FIG. 7, the data transmission method includes, but is not limited to, the following steps, in which:

S701: The first communication device determines the target communication mode, where the target communication mode is used to indicate the number of times that the first communication device transmits to the second communication device a coded bit pattern and a coded bit pattern transmitted each time, wherein the coded bit pattern transmitted each times, contains one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or part of K information bits, where K is a positive integer.

S702: The first communication device sends the coded bit pattern to the second communication device in the target communication mode, and the second communication device receives the coded bit pattern sent by the first communication device in the target communication mode.

In this embodiment of the present application, the first communication device is a terminal device and the second communication device is a network device (eg, a base station), or the first communication device is a network device and the second communication device is a terminal device. The following embodiment will be described using an example in which the first communication device is a terminal device and the second communication device is a network device.

In the present implementation, the network device may indicate the terminal device to select the data transfer mode. In this case, the network device and the terminal device may preconfigure a conversion table between the index and the data transfer mode. The transmission mode may reflect the coded bit pattern transmitted each time and the maximum number of transmissions. The description is presented using an example in which the code lengths used at different coding times are equal (ie, the code rate may be a ratio between the numbers of information bits selected at different coding times). For example, the conversion table between the index and the data transfer mode may be just table 1, but not limited to this. In the data transmission mode represented by index 11, the maximum number of transmission cases is 2; an encoded bit sequence whose code rate is R and an encoded bit sequence whose code rate is R/3 are sent during the first transmission; and if the encoded bit sequences are not decoded correctly, an encoded bit sequence whose code rate is R/5 is sent during the second transmission. In the data transmission mode represented by index 12, the maximum number of transmission cases is 2; an encoded bit sequence whose code rate is R and an encoded bit sequence whose code rate is R/2 are sent during the first transmission; and if the coded bit sequences are incorrectly decoded, the coded bit sequence whose code rate is R/2 and the coded bit sequence whose code rate is R/4 are sent during the second transmission. In FIG. 8 shows the data transfer mode corresponding to index 12.

Table 1

Index Communication mode 0 R one R+R/2 2 R+R/3 3 R+R/4 four R+R/5 5 R+R/2+R/4 6 R+R/2+R/5 7 R+R/3+R/4 eight R+R/3+R/5 9 R+R/2+R/3+R/4 ten R+R/2+R/3+R/5 eleven R+R/3, R/5 12 R+R/2, R/2+R/4 … …

It can be seen from Table 1 that there may be one or more transmission instances and one or more coded code sequences may be transmitted at one time.

In a particular implementation, the network device sends the first index to the end device; the terminal receives the first index sent by the network device and looks in table 1 for the data transfer mode corresponding to the first index. If the first index sent by the network device to the end device is 12, the end device can, by querying table 1, learn about the corresponding data transfer mode in which the maximum number of transmissions is 2; the encoded bit pattern transmitted for the first time contains an encoded bit sequence whose code rate is R and an encoded bit sequence whose code rate is R/2; and if an error occurs when the network device performs decoding, the encoded bit pattern transmitted for the second time contains an encoded bit sequence whose code rate is R/3 and an encoded bit sequence whose code rate is R/5. If the information bits to be transmitted by the terminal are 16 information bits u1-u16, the terminal encodes these 16 information bits u1-u16 using a polar code to obtain a coded bit sequence whose code rate is R; selects eight information bits from the 16 information bits, and encodes the selected information bits using a polar code to obtain a coded bit sequence whose code rate is R/2; and concatenates the two encoded bit sequences and sends them to the network device. If an error occurs while the network device is decoding, the network device sends a NACK message to the terminal device. After receiving the NACK message, the terminal selects eight information bits from these 16 information bits and encodes the selected information bits using a polar code to obtain a coded bit sequence whose code rate is R/2; selects four information bits from the 16 information bits, and encodes the selected information bits using a polar code to obtain a coded bit sequence whose code rate is R/4; and concatenates the two encoded bit sequences and sends them to the network device. For more information, refer to FIG. 5. The terminal may select these eight information bits and these four information bits from these 16 information bits based on the reliability of the polarized channel or based on the reliability and code distance of the polarized channel. For more information, refer to the respective descriptions in the previous embodiment. The details are not re-described here.

It should be noted that if the maximum number of transmission cases corresponding to the data transmission mode is one, after receiving the encoded bit sequence sent by the terminal device, it is not necessary for the network device to send a NACK message to the terminal device.

The network device may send the first index to the end device in a system broadcast message or other signaling. For example, before gaining access to the network, the terminal device through the network device must listen to the system broadcast message and obtain the first index from the received system broadcast message using parsing. The network device may send an index to the end device using downlink control information (DCI).

The network device can determine the data transfer mode based on the distance between the terminal device and the network device, the height of the network device above the ground, the type of network device (for example, terrestrial base station or space base station), or the quality of the communication link between the terminal device and the network device. . For example, if the distance between the terminal device and the network device is relatively short, the network device may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences carried in one transmission is relatively small. If the distance between the terminal device and the network device is relatively large, the network device may select a communication mode in which the number of transmission occurrences is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large. Alternatively, if the distance between the network device and the ground is relatively small, the network device may select a communication mode in which the number of transmissions is relatively large and the number of coded bit sequences that are carried in a single transmission is relatively small. If the distance between the network device and the ground is relatively large, the network device can select a communication mode in which the number of transmission cases is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large. Alternatively, if the network device is a terrestrial base station, in order to improve communication reliability, the network device may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences that are carried in a single transmission is relatively small. If the network device is a space base station, such as a satellite base station, the network device may select a data transmission mode in which the number of transmissions is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large. Alternatively, if the condition (or quality) of the channel between the terminal device and the network device is relatively good, the network device may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences that are carried in a single transmission is relatively small. If the channel condition between the terminal device and the network device is relatively poor, the network device may select a data transmission mode in which the number of transmissions is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large.

Alternatively, in actual application, in order to reduce signaling overhead, the terminal may determine the data transfer mode to be selected. That is, the network device must not send the index to the end device. When accessing the network, the end device needs to obtain the network device type. If the network device is a satellite base station, the terminal device further needs to obtain information about the height of the satellite base station in order to estimate the delay. Therefore, the terminal can determine the appropriate transmission mode based on the satellite height, channel condition, current code rate of the terminal, and the like. In this scheme, the satellite communication handover process is further simplified. In an embodiment in which the network device determines the target data transfer mode and additionally sends an index to the terminal device, the flexibility is relatively high. The terminal device may determine the mode of communication based on the distance between the terminal device and the network device, the type of network device (eg, terrestrial base station or space base station), or the quality of the link between the terminal device and the network device. If the distance between the terminal device and the network device is relatively small, the terminal device may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences carried in a single transmission is relatively small. If the distance between the terminal device and the network device is relatively large, the terminal device may select a data transmission mode in which the number of transmissions is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large. Alternatively, if the distance between the network device and the ground is relatively short, the terminal may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences that are carried in a single transmission is relatively small. If the distance between the network device and the ground is relatively large, the terminal may select a data transmission mode in which the number of transmissions is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large. Alternatively, if the network device is a terrestrial base station, in order to improve communication reliability, the terminal device may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences that are carried in a single transmission is relatively small. If the network device is a space base station, such as a satellite base station, the terminal device may select a data transmission mode in which the number of transmissions is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large. Alternatively, if the condition (or quality) of the channel between the terminal and the network device is relatively good, the terminal may select a data transmission mode in which the number of transmissions is relatively large and the number of coded bit sequences that are carried in a single transmission is relatively small. . If the channel condition between the terminal device and the network device is relatively poor, the terminal device may select a data transmission mode in which the number of transmissions is relatively small and the number of coded bit sequences that are carried in a single transmission is relatively large.

Unlike a terrestrial base station, a satellite base station has different heights. A satellite base station can be further classified as a low orbit satellite, a medium orbit satellite, and a high orbit satellite. For example, a high orbit satellite may be more than 3500 km from the earth, and a low orbit satellite may be less than 600 km from the earth. The maximum distances between some high altitude platform stations (HAPS) (such as balloons and unmanned aerial vehicles) and the user may be even less than the distance between the user and a ground base station. Therefore, there is a relatively large difference between communication delays between space base stations located at different altitudes and the terminal. For a HAPS-type base station or a low-orbit base station, the same data transmission mode that a terrestrial base station can use may be used, or the number of transmission events may be increased accordingly. For a high orbit satellite, the number of transmissions may be reduced or only one transmission may be performed. Thus, delay and reliability can be comprehensively considered, and the base station can flexibly select one or more transmission cases to ensure communication efficiency of different users.

Table 1 can be further divided into a plurality of tables based on different types of base stations. Different types of base stations/network devices correspond to different data transfer schedules. The terminal device determines the type of the base station based on the index sent by the base station or based on other information sent by the base station. The base station type may be a terrestrial base station, a high altitude station platform, a low orbit satellite, a medium orbit satellite, or a high orbit satellite.

As shown in the following tables 2-5, each type of base station corresponds to at least one data transmission mode, which is indicated by different indexes. In addition, the base station types are not limited to the four types listed in the tables, and further divisions are possible for a high orbit satellite, a medium orbit satellite, and a low orbit satellite. One type of satellite corresponds to many types of data transmission. For the same satellite, the distances between different coverage areas corresponding to the satellite and the satellite are different and therefore different transmission modes can be used. In addition, different coding parameters, such as the code rate during coding by the terminal, may also correspond to different transmission modes. This increases the flexibility of satellite data transmission.

The specific transmission mode is not limited to the types shown in the tables. For example, in a plurality of transmission cases for a LEO satellite, one encoded bit sequence may be transmitted once or multiple times; or coded bit sequences transmitted once or multiple times may be repeated, that is, coded bit sequences transmitted once or multiple times contain the same coded bit sequence.

table 2

Ground base station or high orbit station platform Index Communication mode 0 R, R/2, R/4, R/8 one R, R/3, R/6, R/12 2 R, R/4, R/8, R/16

Table 3

low orbit satellite Index Communication mode 0 R+R/2, R/4+R/8, R/2+R/16 one R+R/2, R/4+R/6, R/8+R/10 2 R+R/4, R/6+R/8, R/10+R/12

Table 4

MEO satellite Index Communication mode 0 R+R/2, R/4+R/8 one R+R/3, R/6+R/12 2 R+R/4, R/8+R/16

Table 5

high orbit satellite Index Communication mode 0 R+R/2+R/4+R/8+R/16 one R+R/3+R/6+R/9+R/12 2 R+R/4+R/8+R/16+R/16

Similarly, after the tag determines the type of base station, the network device can select the data mode to be used and send the tag an index corresponding to the selected data mode. The terminal looks up the appropriate table to determine the target data transfer mode. For example, the network device, using the system information, notifies the terminal device that the network device type is a high orbit satellite. The network device selects the data transfer mode corresponding to index 0 and sends index 0 to the end device. After receiving index 0 sent by the network device, the terminal queries table 5 corresponding to the high orbit satellite and decides that the data transmission mode corresponding to index 0 is R+R/2+R/4+R/8+R/ 16, that is, the number of transmissions is one, and the transmitted coded bit pattern contains coded bit sequences, code rates, which are R, R/2, R/4, R/8, and R/16, respectively.

Alternatively, the tag stores in advance data transmission lists corresponding to the different types of base station shown in Tables 2-5, and with reference to the network device type, the current channel state, code rate of the tag, and the like. specifies the data transfer mode to be selected.

It should be noted that one or more encoded code sequences may be sent repeatedly. For example, in the data transmission mode corresponding to index 0 in Table 3, an encoded bit sequence whose code rate is R/2 is repeatedly transmitted in three-time encoding. In addition, the coded bit patterns at different times of transmission may contain a repeated coded bit sequence. As another example, in the data transmission mode corresponding to index 2 in Table 5, five coded bit sequences are transmitted at one time, and a coded bit sequence whose code rate is R/16 is repeatedly transmitted.

It should be noted that the tables in the foregoing embodiments are described using an example in which code lengths used at different encoding times are equal (ie, a code rate may represent a ratio between the numbers of information bits selected at different encoding times). When the code lengths used at different encoding times differ, the code rate R in the table can be directly replaced by the number of information bits. For example, when the code lengths used at different encoding times are different, Table 1 may be replaced with the following Table 6.

Table 6

Index Communication mode 0 K one K+K/2 2 K+K/3 3 K+K/4 four K+K/5 5 K+K/2+K/4 6 K+K/2+K/5 7 K+K/3+K/4 eight K+K/3+K/5 9 K+K/2+K/3+K/4 ten K+K/2+K/3+K/5 eleven K+K/3, K/5 12 K+K/2, K/2+K/4 … …

It can be seen from Table 6 that in the data transmission mode corresponding to index 11, the coded bit pattern transmitted for the first time contains the coded bit sequence obtained by encoding K information bits, the coded bit sequence obtained by encoding K/3 information bits from among K information bits, and the encoded bit pattern transmitted at the second time contains an encoded bit sequence obtained by encoding K/5 information bits out of the K information bits. In the transmission mode corresponding to index 12, the coded bit pattern transmitted for the first time contains the coded bit sequence obtained by encoding K information bits, and the coded bit sequence obtained by encoding K/2 information bits from among the K information bits, and the coded bit sequence the second transmitted pattern contains an encoded bit sequence obtained by encoding K/2 information bits out of K information bits and an encoded bit sequence obtained by encoding K/4 information bits out of K information bits. In addition, the code rate used in each encoding may be the same or may be different. The code length used in each encoding may be the same or may be different.

In FIG. 9 is a functional block diagram of a first communication device and a second communication device according to an embodiment of the present application. The first communication device may be a network device 101 or a terminal device 102 in the embodiment shown in FIG. 1. Accordingly, the second communication device may be a terminal device 102 or a network device 101 in the embodiment shown in FIG. 1. Description is given separately below.

As shown in FIG. 9, the first communication device 500 may include a processor 501 and a transmitter 502.

The processor 501 is configured to determine the target communication mode, where the target communication mode is used to indicate the number of times that the first communication device transmits to the second communication device the coded bit pattern and the coded bit pattern transmitted each time, and the coded bit pattern transmitted each time , contains one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or part of K information bits, where K is a positive integer.

The transmitter module 502 is configured to send the encoded bit pattern to the second communication device in the target data mode.

Alternatively, the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time contains at least two encoded bit sequences.

Alternatively, when the encoded bit pattern transmitted each time contains a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding several information bits out of the K information bits.

Alternatively, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted into P polarized channels; where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; Q information bits are information bits corresponding to the last Q polarized channels, into which P information bits are converted and sorted based on reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are converted to first Q polarized channels from among the P polarized channels, which are sorted based on reliability; where Q is a positive integer less than or equal to P.

Alternatively, the Q information bits are mapped in ascending order of reliability into Q polarized channels with decreasing reliability; or Q information bits are mapped in decreasing order of reliability into Q polarized channels with decreasing reliability.

Alternatively, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted into P polarized channels; where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels among the polarized channels, into which the P information bits are converted and sorted based on code distance and reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are converted to first Q polarized channels from among the P polarized channels, which are sorted based on code distance and reliability; where Q is a positive integer less than or equal to P.

Alternatively, the Q information bits are mapped in ascending order of code distance and reliability to Q polarized channels whose code distances and reliability are in descending order; or Q information bits are mapped with code distance and reliability in descending order into Q polarized channels whose code distances and reliability are in descending order.

Alternatively, the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and the first communication device 500 further comprises:

a receiving unit configured to: receive, before the processor 501 determines the target data transfer mode, a first index sent by the second communication device, where the first index is determined by the second communication device based on the network device attribute information and/or the channel quality between the first device a communication device and a second communication device, wherein the attribute information comprises one or more of the following: a type of network device, a distance between the first communication device and a second communication device, or a height of the network device above the ground, and the type comprises a terrestrial base station or a space base station.

Said processor 501, configured to determine the target data transfer mode, comprises:

determining a target data transfer mode based on a first index and a given lookup table, where the given lookup table contains a lookup relationship between at least one index and at least one data transfer mode, where the at least one index contains the first index and at least at least one data mode contains the target data mode.

Alternatively, the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and said processor 501, configured to determine the target data transfer mode, comprises:

determining a target communication mode based on the network device attribute information and/or the channel quality between the first communication device and the second communication device, where the attribute information contains one or more of the following: network device type, distance between the first communication device and the second communication device, or the height from the network device above the ground and the type contains terrestrial base station or space base station.

Alternatively, the number which is the number of transmissions of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of transmissions of the coded bit pattern and which corresponds to the terrestrial base station; and/or a number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time and which corresponds to the space base station is greater than or equal to the number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time , and which corresponds to a terrestrial base station.

The second communication device 600 may include a receiving unit 601 and a processor 602.

The receiving unit 601 is configured to receive the coded bit pattern sent by the first communication device in the target communication mode, where the target communication mode is used to indicate the number of times the first communication device transmits the coded bit pattern to the second communication device, and the coded bit pattern is transmitted each time, and the encoded bit pattern transmitted each time contains one encoded bit sequence or a plurality of encoded bit sequences, the encoded bit sequence being obtained by encoding all or part of K information bits, where K is a positive integer.

Processor 602 is configured to decode the received encoded bit pattern to obtain a decoded bit sequence.

Alternatively, the coded bit pattern in at least one transmission in the coded bit pattern transmitted each time contains at least two coded bit sequences.

Alternatively, when the encoded bit pattern transmitted each time contains a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits from among the K information bits.

Alternatively, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels; where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; Q information bits are information bits corresponding to the last Q polarized channels, into which P information bits are converted and sorted based on reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are converted to first Q polarized channels from among the P polarized channels, which are sorted based on reliability; and Q is a positive integer less than or equal to P.

Alternatively, the Q information bits are mapped in ascending order of reliability into Q polarized channels with decreasing reliability; or Q information bits are mapped in decreasing order of reliability into Q polarized channels with decreasing reliability.

Alternatively, an encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first encoded bit sequence the bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted into P polarized channels; where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; Q information bits are information bits corresponding to the last Q polarized channels, into which P information bits are converted and sorted based on code distance and reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are converted to first Q polarized channels from among the P polarized channels, which are sorted based on code distance and reliability; where Q is a positive integer less than or equal to P.

Alternatively, the Q information bits are mapped in ascending order of code distance and reliability to Q polarized channels whose code distances and reliability are in descending order; or Q information bits are mapped in descending order of code distance and reliability into Q polarized channels whose code distances and reliability are in descending order.

Alternatively, the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and the second communication device 600 further comprises:

a transmitting unit configured to send, before the receiving unit 601 receives, the encoded bit pattern sent by the first communication device in the target communication mode of the first index to the first communication device, where the first index is used by the first communication device to determine the target communication mode, the first the index is determined by the second communication device based on the attribute information of the network device and/or the channel quality between the first communication device and the second communication device, and the attribute information contains one or more of the following: network device type, distance between the first communication device and the second communication device or the height of the network device above the ground and the type contains a terrestrial base station or a space base station.

Alternatively, the target communication mode is determined by the first communication device based on the attribute information of the network device and on the quality of the link between the first communication device and the second communication device, the attribute information comprising one or more of the following: network device type, distance between the first communication device or the second communication device or the height of the network device above the ground and the type contains a terrestrial base station or a space base station.

Alternatively, the number which is the number of occurrences of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of cases of the transmission of the coded bit pattern and which corresponds to the terrestrial base station; and/or a number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time and which corresponds to the space base station is greater than or equal to the number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time , and which corresponds to a terrestrial base station.

It should be understood that for the specific implementation of the functional blocks contained in the first communication device 500 and the second communication device 600, one must refer to the previous embodiments. The details are not re-described here.

In FIG. 10 is a block diagram of the communications chip presented in this application. As shown in FIG. 10, communications chip 1000 may include a processor 1001 and one or more interfaces 1002 associated with processor 1001. Processor 1001 may be configured to read and execute computer-readable instructions. In a particular implementation, the processor 1001 may comprise primarily a controller, an arithmetic unit, and a register. The controller is mainly responsible for decoding commands and sends a control signal for the operation corresponding to the command. The arithmetic unit is mainly responsible for performing fixed-point arithmetic operations or floating-point arithmetic operations, shift operations, logical operations, and the like, and may also perform addressing and address conversion operations. The register is mainly responsible for storing the number of register operations temporarily stored during the execution of instructions, intermediate results of work, and the like. In a specific implementation, the hardware architecture of the processor 1001 may be an application specific integrated circuits (ASIC) architecture, a microprocessor without interlocked piped stages architecture (MIPS), an advanced computer machine architecture with reduced instruction set (advanced RISC machines, ARM), NP architecture, etc. Processor 1001 may be single-core or multi-core.

Interface 1002 may be configured to input data to be processed into processor 1001 and may output the processing result of processor 1001. In a particular implementation, interface 1002 may be a general purpose input output (GPIO) interface and may be connected to a variety of peripheral devices ( for example, a display (liquid crystal display, LCD), a camera, and a radio frequency (radio frequency, RF) module). Interface 1002 connects to processor 1001 using bus 1003.

In the present application, the processor 1001 may be configured to call from the program memory to implement on the communication device side the data transfer method presented in one or more embodiments of the present application and execute the instructions contained in the program. The memory may be integrated with processor 1001 or may be coupled to communication chip 100 using interface 1002. Interface 1002 may be configured to output a result of execution by processor 1001. In the present application, interface 1002 may be specifically configured to output a result of decoding by processor 1001. For the data transmission method provided in one or more embodiments of the present application, refer to the above embodiments. The details are not re-described here.

It should be noted that the function corresponding to the processor 1001 and the interface 1002 may be implemented using hardware, or may be implemented using software, or may be implemented by combining software and software. This is not a limitation here.

In the description, claims, and accompanying drawings of the present application, the terms "first", "second", "third", "fourth" and so on are intended to distinguish between different entities, but do not indicate a particular order. In addition, the terms "comprising", "having", or any other variation thereof are intended to encompass a non-exclusive addition. For example, a process, method, system, article, or device that comprises a sequence of steps or blocks is not limited to the listed steps or blocks, but optionally further comprises a non-listed step or block, or alternatively further further comprises another step. or unit inherent in a process, method, product, or device.

All or some of the preceding embodiments may be implemented using software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, the embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product contains one or more computer instructions. When computer program instructions are downloaded and executed on a computer, procedures or functions corresponding to the embodiments of the present application are partially or completely generated. The computer may be a mainframe computer, a specialized computer, a computer network, or other programmable device. The computer instructions may be stored on a computer-readable medium or may be transferred from a computer-readable medium to another computer-readable medium. For example, computer commands may be transmitted from a website, computer, server, or information center to another website, computer, server, or information center by wire (for example, coaxial cable, optical fiber, or digital subscriber line (DSL) )) or wirelessly (for example, using infrared, radio or microwaves). Computer-readable media can be any suitable media available to a computer, or a data storage device such as a server or information center that integrates one or more of the available media. The media used may be magnetic media (eg floppy disk, hard disk or magnetic tape), optical media (eg DVD), semiconductor media (eg solid state disk, Solid State Disk, SSD)) and the like.

One skilled in the art will appreciate that all or some of the processes of the methods set forth in the preceding embodiments may be implemented by a computer program instructing appropriate hardware. The program may be stored on a computer-readable medium. When the program is running, the processes of the methods presented in the preceding embodiments are executed. The aforementioned storage medium may be a magnetic disk, an optical disk, read-only memory (ROM), random access memory (RAM), or the like.

In previous specific implementations of the problem, the technical solutions and advantages of the embodiments of the present application have been further described in detail. It should be understood that the foregoing descriptions are merely specific implementations of the embodiments of the present application, but are not intended to limit the scope of protection of the embodiments of the present application. Any modification, equivalent replacement or improvement made on the basis of the technical solutions of the embodiments of the present application should fall within the context of the scope of protection of the embodiments of the present application.

Claims (72)

1. A data transmission method, comprising the steps of: determine by the first communication device the target data transmission mode, in which the target data transmission mode is used to indicate the number of cases when the first communication device transmits the coded bit pattern to the second communication device and the coded bit pattern is transmitted each time, and the coded bit pattern transmitted each time, contains one encoded bit sequence or a plurality of encoded bit sequences, the encoded bit sequence is obtained by encoding all or part of K information bits, where K is a positive integer; and sending by means of the first communication device the encoded bit pattern to the second communication device in the target data transmission mode, wherein the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and before the first communication device determines the target communication mode, the method further comprises: receive by the first communication device the first index sent by the second communication device, in which the first index is determined by the second communication device, based on the attribute information of the network device and/or on the quality of the channel between the first communication device and the second communication device, and the attribute information contains one or more of the following: network device type, distance between the first communication device and the second communication device, or height of the network device above the ground, and the type comprises a terrestrial base station or a space base station; and determine by means of the first communication device the target mode of data transmission and at this stage the target data transfer mode is determined by the first communication device based on the first index and the given lookup table, where the given lookup table contains the lookup relationship between at least one index and at least one data transfer mode, this at least one index contains the first the index and at least one data transfer mode contains the target data transfer mode. 2. The method of claim 1, wherein the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences. 3. The method of claim 1, wherein when the encoded bit pattern transmitted each time comprises a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits out of the K information bits. 4. The method according to any one of paragraphs. 1-3, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels to which the P information bits are mapped and sorted based on reliability; moreover, when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are converted to the first Q polarized channels from among the P polarized channels, which are sorted based on reliability, where Q is a positive integer less than or equal to P. 5. The method of claim 4, wherein the Q information bits are converted in order of increasing reliability into Q polarized channels whose reliability is in descending order, or the Q information bits are converted in decreasing order of reliability into Q polarized channels with reliability in descending order. 6. The method according to any one of paragraphs. 1-3, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels among the polarized channels, into which the P information bits are converted and sorted based on code distance and reliability; and, when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on code distance and reliability, where Q is a positive integer less than or equal to P. 7. The method of claim 6, wherein Q information bits are converted in ascending order of code distance and reliability into Q polarized channels whose code distances and reliability are in descending order, or Q information bits are converted in descending order of code distance and reliability into Q polarized channels, code distances and reliability of which follow in descending order. 8. The method according to any one of paragraphs. 1-7, wherein the determination by the first communication device of the target communication mode comprises the step of determine by the first communication device the target communication mode based on the attribute information of the network device and/or on the quality of the channel between the first communication device and the second communication device, the attribute information containing one or more of the following: network device type, distance between the first communication device and the second communication device or the height of the network device above the ground and the type comprises a terrestrial base station or a space base station. 9. The method according to claim 1 or 8, wherein the number which is the number of occurrences of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of cases of transmission of the coded bit pattern and which corresponds to the terrestrial base station, and /or a number that is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and which corresponds to the space base station, is greater than or equal to the number that is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and which corresponds to a terrestrial base station. 10. A data transmission method, comprising the steps of: receiving, by the second communication device, a coded bit pattern sent by the first communication device in a target communication mode, in which the target communication mode is used to indicate the number of times the first communication device transmits the coded bit pattern to the second communication device, and the coded bit pattern is transmitted each time , and the encoded bit pattern transmitted each time contains one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or part of K information bits, where K is a positive integer; and decoding, by means of the second communication device, the received coded bit pattern to obtain a decoded bit sequence, wherein the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and before the second communication device receives the encoded bit pattern sent by the first communication device in the destination data mode, the method further comprises: sending, by means of the second communication device, a first index to the first communication device, the first index being used by the first communication device to determine the target data transfer mode, the first index being determined by the second communication device based on the attribute information of the network device and/or the channel quality between the first communication device and the second communication device, and the attribute information contains one or more of the following: network device type, distance between the first communication device and the second communication device, or height of the network device above the ground, and the type contains a terrestrial base station or a space base station. 11. The method of claim 10, wherein the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences. 12. The method of claim 10, wherein when the encoded bit pattern transmitted each time comprises a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits out of the K information bits. 13. The method according to any one of paragraphs. 10-12, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; wherein the Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels to which the P information bits are converted and sorted based on reliability; and, when the Q information bits are encoded using a polar code to obtain the second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on reliability, where Q is a positive integer less than or equal to P. 14. The method of claim 13, wherein the Q information bits are mapped in increasing order of reliability into Q polarized channels with decreasing order reliability, or the Q information bits are mapped in decreasing order of reliability into Q polarized channels with decreasing order reliability. 15. The method according to any one of paragraphs. 10-12, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels among the polarized channels, into which the P information bits are converted and sorted based on code distance and reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on code distance and reliability, where Q is a positive integer less than or equal to P. 16. The method of claim 15, wherein the Q information bits are converted in ascending order of code distance and reliability into Q polarized channels whose code distances and reliability are in descending order, or the Q information bits are converted in descending order of code distance and reliability into Q polarized channels, code distances and reliability of which follow in descending order. 17. The method according to any one of paragraphs. 10-16, wherein the target communication mode is determined by the first communication device based on the network device attribute information and/or the channel quality between the first communication device and the second communication device, the attribute information comprising one or more of the following: network device type, the distance between the first communication device and the second communication device, or the height of the network device above the ground, and the type comprises a terrestrial base station or a space base station. 18. The method according to claim 10 or 17, wherein the number which is the number of occurrences of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of cases of transmission of the coded bit pattern and which corresponds to the terrestrial base station, and /or a number that is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and which corresponds to the space base station, is greater than or equal to the number that is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and which corresponds to a terrestrial base station. 19. Communication device, where the communication device is the first communication device and the first communication device contains: a processor configured to determine a target communication mode, wherein the target communication mode is used to indicate the number of times the first communication device transmits the coded bit pattern to the second communication device and the coded bit pattern is transmitted each time and the coded bit pattern transmitted each time , contains one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or part of K information bits, where K is a positive integer; and a transmitting unit configured to send the encoded bit pattern to the second communication device in the target data transmission mode, wherein the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and the first communication device further comprises: a receiving unit configured to: receive, before the processor determines the target data transfer mode, a first index sent by the second communication device, where the first index is determined by the second communication device based on the network device attribute information and/or the channel quality between the first communication device and a second communication device, the attribute information comprising one or more of the following: a network device type, a distance between the first communication device and the second communication device, or a height of the network device above the ground, and the type comprises a terrestrial base station or a space base station; and said processor, configured to determine the target data transfer mode, comprises: determining a target data transfer mode based on a first index and a given lookup table, where the given lookup table contains a lookup relationship between at least one index and at least one data transfer mode, wherein at least one index contains the first index and at least at least one data mode contains the target data mode. 20. The communications apparatus of claim 19, wherein the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences. 21. The communication apparatus of claim 19, wherein when the encoded bit pattern transmitted each time comprises a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits out of the K information bits. 22. Communication device according to any one of paragraphs. 19-21, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; and Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels into which P information bits are converted and sorted based on reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels that are sorted based on reliability, where Q is a positive integer less than or equal to P. 23. The communications apparatus of claim 22, wherein the Q information bits are mapped in ascending order of reliability into Q polarized channels with decreasing order reliability, or the Q information bits are mapped in decreasing order of reliability into Q polarized channels with decreasing order of reliability. 24. Communication device according to any one of paragraphs. 19-21, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels among the polarized channels, into which the P information bits are converted and sorted based on code distance and reliability; when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on code distance and reliability, where Q is a positive integer less than or equal to P. 25. The communications apparatus of claim 24, wherein Q information bits are converted in ascending order of code distance and reliability into Q polarized channels with code distances and reliability in descending order, or Q information bits are converted in descending order of code distance and reliability into Q polarized channels. with code distances and reliability in descending order. 26. Communication device according to any one of paragraphs. 19-25, wherein the processor, configured to determine the target data transfer mode, comprises: determining the target communication mode based on the attribute information of the network device and/or the quality of the link between the first communication device and the second communication device, where the attribute information contains one or more of the following: network device type, distance between the first communication device and the second communication device or the height of the network device above the ground and the type contains a terrestrial base station or a space base station. 27. The communication apparatus according to claim 19 or 26, wherein the number which is the number of occurrences of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of cases of the transmission of the coded bit pattern and which corresponds to the terrestrial base station, and/or a number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time and which corresponds to the space base station is greater than or equal to the number which is the number of coded bit sequences contained in the coded bit pattern transmitted each time , and which corresponds to a terrestrial base station. 28. Communication device, in which the communication device is the second communication device and the second communication device contains: a receiving unit configured to receive the coded bit pattern sent by the first communication device in the target communication mode, where the target communication mode is used to indicate the number of times the first communication device transmits the coded bit pattern to the second communication device and the coded bit pattern is transmitted each time , and the encoded bit pattern transmitted each time contains one encoded bit sequence or a plurality of encoded bit sequences, and the encoded bit sequence is obtained by encoding all or part of K information bits, where K is a positive integer; and a processor configured to decode the received coded bit pattern to obtain a decoded bit sequence, wherein the first communication device is a terminal device and the second communication device is a network device, or the first communication device is a network device and the second communication device is a terminal device; and the second communication device further comprises a transmitting unit configured to send, before the receiving unit receives the encoded bit pattern sent by the first communication device in the target communication mode, the first index to the first communication device, where the first index is used by the first communication device to determine the target communication mode, the first index is determined by the second communication device based on the attribute information of the network device and/or the quality of the channel between the first communication device and the second communication device, and the attribute information contains one or more of the following: type of network device, distance between the first communication device and the second communication device, or the height of the network device above the ground and the type contains a terrestrial base station or a space base station. 29. The communications apparatus of claim 28, wherein the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences. 30. The communication apparatus of claim 28, wherein when the encoded bit pattern transmitted each time comprises a plurality of encoded bit sequences, at least one of the plurality of encoded bit sequences is obtained by encoding some information bits out of the K information bits. 31. Communication device according to any one of paragraphs. 28-30, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, where the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; moreover, P information bits are converted into P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; wherein the Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels to which the P information bits are converted and sorted based on reliability; and, when the Q information bits are encoded using a polar code to obtain the second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on reliability, where Q is a positive integer less than or equal to P. 32. The communications apparatus of claim 31, wherein the Q information bits are mapped in ascending order of reliability into Q polarized channels with decreasing reliability, or the Q information bits are mapped in decreasing order of reliability into Q polarized channels with decreasing reliability. 33. Communication device according to any one of paragraphs. 28-30, in which the encoded bit sequence is obtained by performing encoding using a polar code; and when the encoded bit pattern in at least one transmission in the encoded bit pattern transmitted each time comprises at least two encoded bit sequences, the at least two encoded bit sequences comprise a first encoded bit sequence and a second encoded bit sequence, the first the encoded bit sequence is obtained by encoding P information bits from among the K information bits using a polar code; P information bits are converted to P polarized channels, where P is a positive integer less than or equal to K; the second encoded bit sequence is obtained by encoding Q information bits from among the K information bits using a polar code; The Q information bits are information bits corresponding to the last Q polarized channels of the polarized channels to which the P information bits are mapped and sorted based on code distance and reliability; and, when the Q information bits are encoded using a polar code to obtain a second coded bit sequence, the Q information bits are mapped to the first Q polarized channels of the P polarized channels, which are sorted based on code distance and reliability, where Q is a positive integer less than or equal to P. 34. The communication device according to claim 33, in which Q information bits are converted in order of increasing code distance and reliability into Q polarized channels, code distances and reliability of which follow in descending order, or Q information bits are converted in descending order of code distance and reliability into Q polarized channels, whose code distances and reliability are in descending order. 35. Communication device according to any one of paragraphs. 28-34, wherein the target communication mode is determined by the first communication device based on the network device attribute information and/or the channel quality between the first communication device and the second communication device, and the attribute information contains one or more of the following: network device type, the distance between the first communication device and the second communication device, or the height of the network device above the ground, and the type comprises a terrestrial base station or a space base station. 36. The communication apparatus according to claim 28 or 35, wherein the number which is the number of occurrences of the coded bit pattern and which corresponds to the space base station is less than or equal to the number which is the number of cases of the transmission of the coded bit pattern and which corresponds to the terrestrial base station, and/or a number that is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and when this number corresponds to the space base station is greater than or equal to the number that is the number of coded bit sequences contained in the coded bit pattern transmitted each time, and when that number matches the ground base station. 37. A communication device containing a processor and an interface in which the interface is configured to input data to be processed; the processor is configured to process the data to be processed using the method of claim 1 to obtain a processing result; and the interface is additionally configured to output the processing result. 38. The communications device of claim 37, wherein the device further comprises a memory, the memory is configured to store instructions, and the instructions are executed by the processor to perform the method of claim 1. 39. Communication device according to claim 37 or 38, in which the device is a microcircuit. 40. A communication device containing a processor and an interface in which the interface is configured to input data to be processed; the processor is configured to process the data to be processed using the method of claim 10 to obtain a processing result; and the interface is additionally configured to output the processing result. 41. The communications device of claim 40, wherein the device further comprises a memory, the memory is configured to store instructions, and the instructions are executed by the processor to perform the method of claim 10. 42. Communication device according to claim 40 or 41, in which the device is a microcircuit. 43. A computer-readable medium, where the computer-readable medium is configured to store instructions and, when the instructions are executed on the communication device, the method of claim 1 is performed. 44. A computer-readable medium, where the computer-readable medium is configured to store instructions and, when the instructions are executed on the communication device, the method of claim 10 is performed.

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