CN111600677A

CN111600677A - Data transmission method and device

Info

Publication number: CN111600677A
Application number: CN201910127250.4A
Authority: CN
Inventors: 颜矛; 黄煌; 邵华; 高宽栋
Original assignee: Chengdu Huawei Technology Co Ltd
Current assignee: Chengdu Huawei Technology Co Ltd
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-08-28
Anticipated expiration: 2039-02-20
Also published as: CN111600677B; WO2020168986A1

Abstract

The application provides a data transmission method and device. The method comprises the following steps: the sending equipment obtains at least two transmission blocks; the sending equipment cascades or interleaves the at least two transmission blocks to obtain a cascaded or interleaved data block; and the sending equipment carries out second-stage channel coding on the cascaded or interleaved data block and sends a coded code block. In the application, the sending equipment combines a plurality of small packet data into big packet data, and performs channel coding and sending on the big packet data, so that higher channel coding gain can be obtained, and the reliability of the wireless communication system and the utilization rate of physical resources are further improved.

Description

Data transmission method and device

Technical Field

The present application relates to communications technologies, and in particular, to a data transmission method and apparatus.

Background

In Long Term Evolution (LTE) and New Radio (NR) systems, a Medium Access Control (MAC) layer in a base station or a terminal device schedules data packets of different users and is responsible for data retransmission. The Physical (PHY) layer channel codes, modulates, and maps data to physical resources. Specifically, in the PHY layer, the base station performs Cyclic Redundancy Check (CRC), code division Block, code Block CRC, channel coding and rate matching, code Block concatenation and modulation, and mapping on independent physical Resource locations, i.e., Resource Elements (REs), on Transport Blocks (TBs) of different users, respectively.

At present, the data channel coding defined in the related art mainly aims at a relatively large data packet, and the data of the large data packet contains more bytes, so that a relatively high channel coding gain can be obtained. In the future, in the industrial scenario, large-scale packet data exists, for example, a packet data includes 1 to 50 bytes, and when the packet data is separately channel-coded, the channel coding gain that can be obtained is low, so that the communication reliability and the utilization rate of physical resources are low.

Disclosure of Invention

The application provides a data transmission method and a data transmission device, which improve channel coding gain to a certain extent, thereby improving the reliability of a wireless communication system and the utilization rate of physical resources.

In a first aspect, the present application provides a data transmission method, where the data transmission method may be applied to a sending device in a wireless communication system, and the sending device may be a base station or a terminal device. After determining at least two transmission blocks to be transmitted, the transmitting device concatenates or interleaves the transmission blocks to generate a concatenated or interleaved data block, then performs second-level channel coding on the concatenated or interleaved data block as a whole, and transmits a coded code block to the receiving device.

The at least two transport blocks may include different user data sent by the sending device to the at least two receiving devices, or include user data with different Quality of service (QoS) sent by the sending device to the same receiving device. For example, one base station transmits different user data to multiple terminal devices, or one base station transmits multiple user data with different QoS requirements to the same terminal device. Alternatively, one terminal device transmits different user data to other nearby terminal devices, or one terminal device transmits a plurality of user data with different QoS requirements to another terminal device.

In the application, in a scene of sending small packet data, a sending device combines a plurality of small packet data into big packet data, and performs channel coding and sending on the big packet data, so that a higher channel coding gain can be obtained, and the reliability of a wireless communication system and the utilization rate of physical resources are further improved.

Based on the first aspect, in some possible embodiments, before the sending device concatenates or interleaves the at least two transport blocks to obtain a concatenated or interleaved data block, the method may further include: the transmitting device performs a first level channel coding on at least one of the at least two transport blocks. That is to say, after obtaining at least two transport blocks, the sending device performs first-level channel coding on at least one of the transport blocks, then concatenates or interleaves the coded code block and the transport block that has not been coded to obtain a concatenated or interleaved data block, and further performs second-level channel coding on the data block.

In the application, the transmitting device carries out multi-stage channel coding on at least one of at least two transmission blocks, so that the error correction capability of the wireless communication system is improved, and the communication reliability is further improved.

Based on the first aspect, in some possible embodiments, the method further includes: the transmitting device transmits control information indicating the coding information of the first level channel coding and the coding information of the second level channel coding.

In this application, the coding information may include a code rate and/or a coding mode of channel coding.

In this application, the control information includes at least one of the following information: downlink Control Information (DCI), Sidelink Control Information (SCI), Media Access Control-Control Element (MAC-CE), or Radio Resource Control (RRC) message.

Based on the first aspect, in some possible implementations, the data transmission method may further include: the sending equipment generates a corresponding first CRC bit for at least one of at least two transmission blocks; the transmitting device correspondingly adds a first CRC bit after at least one transport block.

Based on the first aspect, in some possible embodiments, the first CRC bits corresponding to different transport blocks of the at least two transport blocks are different.

In the application, the transmitting device adds different CRC bits to different user data, thereby improving the channel coding gain and providing different error protection for different users.

Based on the first aspect, in some possible embodiments, the method may further include: the sending equipment generates a corresponding second CRC bit for the data block after the cascade connection or the interweaving; the transmitting device adds a second CRC bit after the concatenated or interleaved data block.

In the application, the transmitting device adds the CRC bits again after the data block formed by cascading or interleaving the plurality of transmission blocks to which the CRC bits are respectively added, so that the receiving device performs multi-stage CRC check on the code block while decoding the code block after demodulating the code block, thereby improving the error detection capability of the wireless communication system and further improving the reliability of the wireless communication system.

In a second aspect, the present application provides a data transmission method, which may be applied to a receiving device in a wireless communication system, where the receiving device may be a terminal device. After receiving the code block to be decoded sent by the sending device, the receiving device performs second-level channel decoding on the code block to be decoded to obtain a decoded data block, wherein the decoded data block is obtained by cascading or interleaving at least two transmission blocks, and finally, the receiving device performs de-cascading or de-interleaving on the decoded data block to obtain a target transmission block of the receiving device.

The at least two transport blocks include different user data sent by the sending device to the at least two receiving devices, or user data with different QoS sent by the sending device to the same receiving device. For example, one base station transmits different user data to multiple terminal devices, or one base station transmits multiple user data with different QoS requirements to the same user. Alternatively, one terminal device transmits different user data to other nearby terminal devices, or one terminal device transmits a plurality of user data with different QoS requirements to another terminal device.

In the application, in a scene of sending small packet data, a plurality of small packet data are combined into big packet data, and the big packet data is subjected to channel coding and sending, so that higher channel coding gain can be obtained, and further, the communication reliability and the utilization rate of physical resources are improved.

Based on the second aspect, in some possible embodiments, the performing, by the receiving device, a de-concatenation or a de-interleaving on the decoded data block to obtain a target transport block of the receiving device may include: the receiving equipment carries out de-concatenation or de-interleaving on the decoded data block to obtain the data block of the receiving equipment; and the receiving equipment performs channel decoding on the data block of the receiving equipment to obtain a target transmission block.

Based on the second aspect, in some possible embodiments, the method may further include: receiving control information by receiving equipment, wherein the control information is used for indicating coding information of a first-level channel coding and coding information of a second-level channel coding, the first-level channel coding is used for carrying out channel coding on at least one transmission block in at least two transmission blocks, and the second-level channel coding is used for carrying out channel coding on a data block after cascade connection or interweaving; then, the channel decoding of the data block of the receiving device by the receiving device includes: performing first-stage channel decoding on a data block of the receiving equipment according to the coding information of the first-stage channel coding; the receiving device carries out second-level channel decoding on the code block to be decoded, and the second-level channel decoding comprises the following steps: and the receiving equipment performs channel decoding on the code block to be decoded according to the coding information of the second-level channel coding.

Based on the second aspect, in some possible embodiments, the control information includes at least one of the following information: DCI, SCI, MAC-CE, or RRC message.

Based on the second aspect, in some possible embodiments, the method may further include: and the receiving equipment performs CRC on the decoded data block.

Based on the second aspect, in some possible embodiments, the method may further include: the receiving device performs a CRC check on the target transport block.

In a third aspect, the present application provides a communication device, which may be a channel coding device or a chip or a system on a chip in a channel coding device, and may also be a functional module in a channel coding device for implementing the method according to the first aspect or any possible implementation manner of the first aspect. The communication means may implement the functions performed by the sending device in the above aspects or possible embodiments, which functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, the communication device may include: an obtaining module configured to obtain at least two transport blocks; the multiplexing module is used for cascading or interleaving at least two transmission blocks to obtain cascaded or interleaved data blocks; the second coding module is used for carrying out second-level channel coding on the data blocks after the cascade connection or the interweaving; and the sending module is used for sending the coded code blocks.

Based on the third aspect, in some possible embodiments, the apparatus may further include: and the first coding module is used for performing first-stage channel coding on at least one transport block in the at least two transport blocks before the multiplexing module performs cascade connection or interleaving on the at least two transport blocks.

Based on the third aspect, in some possible embodiments, the sending module is further configured to send control information, where the control information is used to indicate coding information of the first-level channel coding and coding information of the second-level channel coding.

Based on the third aspect, in some possible embodiments, the coding information includes a coding rate and/or a coding mode of channel coding.

Based on the third aspect, in some possible embodiments, the control information includes at least one of the following information: DCI, SCI, MAC-CE, or RRC message.

Based on the third aspect, in some possible embodiments, the apparatus may further include: a first CRC adding module, configured to generate corresponding first CRC bits for at least one transport block of the at least two transport blocks; a first CRC bit is correspondingly added to at least one transport block.

Based on the third aspect, in some possible embodiments, the first CRC bits corresponding to different transport blocks of the at least two transport blocks are different.

Based on the third aspect, in some possible embodiments, the apparatus may further include: a second CRC adding module, configured to generate a corresponding second CRC bit for the concatenated or interleaved data block after the concatenated or interleaved data block is obtained by the multiplexing module; a second CRC bit is added after the concatenated or interleaved data block.

The obtaining module mentioned in the third aspect may be an input interface, an input circuit, a receiver, or the like; the sending module can be an output interface, an input circuit or a transmitter, etc. The other modules (e.g., the multiplexing module, the first encoding module, the second encoding module, the first CRC addition module, or the second CRC addition module) may be one or more processors.

In a fourth aspect, the present application provides a communication apparatus, which may be a chip in a receiving device or on a chip. The communication apparatus may implement the functions performed by the sending device in the above aspects or possible embodiments, and the functions may be implemented by hardware, such as: in one possible implementation, the communication device may include: a processor and a communication interface, the processor being operable to support the communication device to perform the functions referred to in the first aspect or any one of the possible implementations of the first aspect, for example: the processor may transmit the encoded code blocks to a receiving device through the communication interface. In yet another possible implementation, the communication device may further include a memory for storing computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer executable instructions stored by the memory to cause the communication device to perform the data transmission method according to the first aspect or any one of the possible embodiments of the first aspect.

In a fifth aspect, the present application provides a communication device, which may be a channel decoding device or a chip or a system on a chip in a channel decoding device, and may also be a functional module in a channel decoding device for implementing the method according to the second aspect or any possible implementation manner of the second aspect. The communication means may implement the functions performed by the receiving device in the above aspects or possible embodiments, which functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, the communication device may include: the receiving module is used for receiving the code block to be decoded sent by the sending equipment; the second decoding module is used for performing second-level channel decoding on the code block to be decoded to obtain a decoded data block, and the decoded data block is obtained by cascading or interweaving at least two transmission blocks; and the demultiplexing module is used for performing de-concatenation or de-interleaving on the decoded data block to obtain a target transmission block of the receiving equipment.

Based on the fifth aspect, in some possible embodiments, the demultiplexing module may be specifically configured to perform de-concatenation or de-interleaving on the decoded data block to obtain a data block of the receiving device; the above apparatus may further include: the first decoding module may be configured to perform first-level channel decoding on a data block of the receiving device to obtain a target transport block.

Based on the fifth aspect, in some possible embodiments, the receiving module is further configured to receive control information, where the control information is used to indicate coding information of the first level channel coding and coding information of the second level channel coding.

Here, the first-stage channel coding is channel coding performed on at least one of the at least two transport blocks, and the second-stage channel coding is channel coding performed on a data block after concatenation or interleaving of the at least two transport blocks; then, the first decoding module is configured to perform first-level channel decoding on the data block of the receiving device according to the coding information of the first-level channel coding; and the second decoding module is used for performing second-level channel decoding on the code block to be decoded according to the coding information of the second-level channel coding.

Based on the fifth aspect, in some possible embodiments, the control information includes at least one of the following information: DCI, SCI, MAC-CE, or RRC message.

Based on the fifth aspect, in some possible embodiments, the apparatus may further include: and the first CRC check module is used for performing CRC check on the decoded data block.

Based on the fifth aspect, in some possible embodiments, the apparatus may further include: and the second CRC check module is used for carrying out CRC check on the target transmission block.

The receiving module mentioned in the above fifth aspect may be an input interface, an input circuit, a receiver, or the like. The other modules (e.g., the demultiplexing module, the first decoding module, the second decoding module, the first CRC check module, or the second CRC check module) may be one or more processors.

In a sixth aspect, the present application provides a communication apparatus, which may be a chip or a system on chip in a transmitting device. The communication apparatus may implement the functions performed by the receiving device in the above aspects or possible embodiments, and the functions may be implemented by hardware, such as: in one possible implementation, the communication device may include: a processor and a communication interface, the processor being operable to enable the communication device to carry out the functions referred to in the second aspect or any one of the possible embodiments of the second aspect, for example: the processor may receive, through the communication interface, code blocks to be decoded transmitted by the transmitting device. In yet another possible implementation, the communication device may further include a memory for storing computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer-executable instructions stored by the memory to cause the communication device to perform the data transmission method according to the second aspect or any one of the possible embodiments of the second aspect.

In a seventh aspect, the present application provides a communication device, which may be a sending device or a receiving device, where the communication device may include: one or more processors; a memory for storing one or more programs; when executed by one or more processors, cause the one or more processors to implement the method of any one of the first and second aspects as described above.

In an eighth aspect, the present application provides a computer-readable storage medium having stored thereon instructions for performing the method of any one of the first and second aspects described above, when the instructions are run on a computer.

In a ninth aspect, the present application provides a computer program or computer program product which, when executed on a computer, causes the computer to carry out the method of any one of the first and second aspects described above.

In a tenth aspect, the present application provides a wireless communication system comprising a transmitting device and a receiving device; wherein the sending device is configured to perform the method of any of the first aspects; a receiving device for performing the method of any of the second aspects above.

It should be understood that the third to tenth aspects of the present application are consistent with the technical solutions of the first and second aspects of the present application, and similar advantageous effects are achieved in each aspect and the corresponding possible implementation manner, and thus detailed descriptions are omitted.

Drawings

Fig. 1A is a schematic structural diagram of a wireless communication system according to an embodiment of the present application;

fig. 1B is a schematic diagram of another architecture of a wireless communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a Medium Access Control (MAC) layer and a Physical (PHY) layer of a base station in an embodiment of the present application;

fig. 3 is a diagram illustrating that control information indicates user data information in the embodiment of the present application;

fig. 4 is a schematic flowchart of a first implementation flow of a data transmission method at a sending device side in an embodiment of the present application;

fig. 5A is a schematic diagram of a concatenated data block in an embodiment of the present application;

FIG. 5B is a diagram of an interleaved data block in an embodiment of the present application;

fig. 6 is a schematic flowchart of a first implementation of a data transmission method for two transmission blocks in an embodiment of the present application;

fig. 7 is a schematic flowchart of a second implementation of a data transmission method for two transmission blocks in the embodiment of the present application;

fig. 8 is a flowchart illustrating a third implementation of a data transmission method for two transmission blocks in the embodiment of the present application;

fig. 9 is a schematic flowchart of a second implementation flow of a data transmission method at a sending device side in the embodiment of the present application;

fig. 10 is another diagram illustrating that control information indicates user data information in the embodiment of the present application;

fig. 11 is a schematic flowchart of a fourth implementation of a data transmission method for two transmission blocks in this embodiment of the application;

fig. 12 to 14 are schematic diagrams illustrating three simulations of a data transmission method according to an embodiment of the present application;

fig. 15 is a schematic flowchart of a first implementation flow of a data transmission method on a receiving device side in an embodiment of the present application;

fig. 16 is a schematic flowchart of a second implementation flow of a data transmission method on a receiving device side in the embodiment of the present application;

fig. 17 is a first structural diagram of a communication device in an embodiment of the present application;

fig. 18 is a schematic structural diagram of a Medium Access Control (MAC) layer and a Physical (PHY) layer of a base station in an embodiment of the present application;

fig. 19 is a schematic structural diagram of a transmitting apparatus in an embodiment of the present application;

fig. 20 is a second structural diagram of a communication device in the embodiment of the present application;

fig. 21 is a schematic structural diagram of a receiving apparatus in the embodiment of the present application;

fig. 22 is another schematic structural diagram of a receiving apparatus in the embodiment of the present application;

fig. 23 is a third structural diagram of a communication device in the embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings. In the following description, reference is made to the accompanying drawings which form a part hereof and in which is shown by way of illustration specific aspects of embodiments of the present application or in which specific aspects of embodiments of the present application may be employed. It should be understood that embodiments of the present application may be used in other ways and may include structural or logical changes not depicted in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present application is defined by the appended claims. For example, it should be understood that the disclosure in connection with the described methods may equally apply to corresponding apparatuses or systems for performing the methods, and vice versa. For example, if one or more particular method steps are described, the corresponding apparatus may comprise one or more units, such as functional units, to perform the described one or more method steps (e.g., a unit performs one or more steps, or multiple units, each of which performs one or more of the multiple steps), even if such one or more units are not explicitly described or illustrated in the figures. On the other hand, for example, if a particular apparatus is described based on one or more units, such as functional units, the corresponding method may comprise one step to perform the functionality of the one or more units (e.g., one step performs the functionality of the one or more units, or multiple steps, each of which performs the functionality of one or more of the plurality of units), even if such one or more steps are not explicitly described or illustrated in the figures. Further, it is to be understood that features of the various exemplary embodiments and/or aspects described herein may be combined with each other, unless explicitly stated otherwise.

Fig. 1A is a schematic structural diagram of a wireless communication system in an embodiment of the present application, and referring to fig. 1A, the wireless communication system 10 may include a base station 11 and a terminal device 12. Base station 11 may communicate with terminal device 12. It should be noted that the base station and the terminal device included in the wireless communication system as shown in fig. 1A are only an example. In this embodiment, fig. 1B is another schematic architecture diagram of a wireless communication system in this embodiment, and referring to fig. 1B, the wireless communication system 10 may further include a plurality of terminal devices 12, where the terminal devices 12 may directly communicate with each other, and communication data does not need to be forwarded through a base station. Of course, in the embodiment of the present application, the type and number of network elements included in the wireless communication system, and the connection relationship between the network elements are not limited thereto.

The above-mentioned wireless communication system may be a communication system supporting a Fourth Generation (4G) access technology, such as an LTE access technology; alternatively, the communication system may be a communication system supporting a Fifth Generation (5G) access technology, such as NR access technology; alternatively, the communication system may also be a communication system supporting a plurality of wireless technologies, for example, a communication system supporting an LTE technology and an NR technology. In addition, the communication system may also be adapted for future-oriented communication technologies.

The base station in fig. 1A may be a device that is used by an Access network side to support a terminal device to Access a wireless communication system, and may be, for example, an evolved NodeB (eNB) in a 4G Access technology communication system, a next generation NodeB (gNB) in a 5G Access technology communication system, a Transmission Reception Point (TRP), a Relay Node (Relay Node), an Access Point (AP), or the like.

The Terminal device in fig. 1A and 1B may be a device providing voice or data connectivity to a User, and may also be referred to as a User Equipment (UE), a mobile STAtion (mobile STAtion), a subscriber unit (subscriber unit), a STAtion (STAtion), or a Terminal Equipment (TE). The terminal device may be a cellular phone (cellular phone), a Personal Digital Assistant (PDA), a Wireless modem (modem), a handheld device (hand), a laptop computer (laptop computer), a cordless phone (cordless phone), a Wireless Local Loop (WLL) station, a tablet (pad), or the like. With the development of wireless communication technology, all devices that can access a wireless communication system, can communicate with a network side of the wireless communication system, or communicate with other devices through the wireless communication system may be terminal devices in the embodiments of the present application, such as terminals and automobiles in intelligent transportation, home devices in smart homes, power meter reading instruments in smart grid, voltage monitoring instruments, environment monitoring instruments, video monitoring instruments in smart security networks, cash registers, and so on. In the embodiment of the present application, the terminal device may communicate with the base station, and a plurality of terminal devices may also communicate with each other. The terminal device may be stationary or mobile.

In this embodiment, taking communication between a base station and a terminal device as an example, fig. 2 is a schematic structural diagram of a Medium Access Control (MAC) layer and a Physical (PHY) layer of the base station in this embodiment, and as can be seen with reference to fig. 1A and fig. 2, a MAC layer 1011 of a base station 11 transfers user data to be sent to different terminal devices, for example, 20 bytes of user data to a first terminal device and 30 bytes of user data to be sent to a second terminal device, to a PHY layer 1012 by using a Transport Block (TB), and the PHY layer 1012 sequentially performs a series of processing of transport block CRC, code block division, code block CRC, channel coding and rate matching, code block concatenation and modulation, and mapping to corresponding REs on a 20 byte transport block 131 and a 30 byte transport block 132, respectively. Wherein the transport block CRC and channel coding of PHY layer 1012 provide error detection capability and error correction capability, respectively, for the data.

In the process of processing the transport block by the PHY layer, fig. 3 is a schematic diagram of the Control Information indicating the user data Information in the embodiment of the present application, and referring to fig. 3, the base station indicates the user data Information 32 of the terminal device by sending the Control Information 31 for the terminal device, such as Downlink Control Information (DCI), to the terminal device, where the user data Information 32 may include time-frequency resource position Information of the user data, modulation Information of the user data, coding Information of the user data, and the like. For example, the base station indicates resource locations, adjustment coding information, and the like of the first terminal device and the second terminal device through DCI1 and DCI2, respectively. Correspondingly, on the user side, the first terminal device and the second terminal device firstly receive the DCI facing themselves, and then receive the user data according to the DCI. Specifically, the PHY layer of the first terminal device receives DCI1, decodes the demodulated code block according to DCI1, obtains user data to be sent to the first terminal device by the base station, and then transmits the user data to the MAC layer of the first terminal device; similarly, the second terminal device receives the DCI2, decodes the demodulated code block according to the DCI2, obtains user data sent by the base station to the second terminal device, and then transmits the user data to the MAC layer of the second terminal device.

Or, taking communication between terminal devices as an example, as seen in fig. 1B and fig. 2, the MAC layer 1011 of the third terminal device respectively transmits user data to be transmitted to different terminal devices, for example, user data to be transmitted to the first terminal device and the second terminal device is transferred to the PHY layer 1012 by using transport blocks, and the PHY layer 1012 respectively sequentially performs a series of processing of transport block CRC, code block division, code block CRC, channel coding and rate matching, code block concatenation and modulation, and mapping to corresponding REs on the transport block 131 to be transmitted to the first terminal device and the transport block 132 to be transmitted to the second terminal device. Wherein the transport block CRC and the channel coding of the PHY layer provide error detection capability and error correction capability, respectively, for the data. At this time, the third terminal device may send Control Information for the terminal device, such as Sidelink Control Information (SCI), to the first terminal device and the second terminal device to indicate user data Information, such as time-frequency resource position Information of the user data, modulation Information of the user data, and coding Information of the user data. For example, the third terminal device indicates resource locations, adjustment encoding information, and the like adjacent to the first terminal device and the second terminal device through SCI1 and SCI2, respectively. Accordingly, the first terminal device and the second terminal device first receive the SCI oriented to themselves and then receive the user data according to the SCI. Specifically, the PHY layer of the first terminal device receives SCI1, decodes the demodulated code block according to SCI1, obtains user data sent to the first terminal device by the third terminal device, and then transfers the user data to the MAC layer of the first terminal device; similarly, the second terminal device receives SCI2, decodes the demodulated code block according to SCI2, obtains user data sent by the third terminal device to the second terminal device, and then delivers the user data to the MAC layer of the second terminal device.

However, when the PHY layer of the base station or the PHY layer of the terminal device performs channel coding on user data to be transmitted, for small packet data (for example, a transport block including 1 to 50 bytes), the channel coding gain that can be obtained is low, which results in low communication reliability of the wireless communication system and low utilization rate of physical resources.

The scheme of the embodiment of the application is explained in detail as follows:

the first embodiment of the application:

in order to solve the above problem, an embodiment of the present invention provides a data transmission method, which may be applied to a transmitting device in the wireless communication system, where the transmitting device may be a base station in the wireless communication system or a terminal device in the wireless communication system.

Fig. 4 is a schematic diagram of a first implementation flow of a data transmission method on a sending device side in an embodiment of the present application, and referring to fig. 4, the data transmission method includes:

s401: the sending equipment obtains at least two transmission blocks;

here, the MAC layer of a transmitting device, such as a base station or a terminal device, delivers user data to be transmitted to the PHY layer using at least two transport blocks. In the scenario of sending a small packet of data, each of the at least two transport blocks may include 1 to 50 bytes, but other transport blocks with smaller number of bytes may also be used.

In this embodiment, the at least two transport blocks may include different user data sent by the sending device to the at least two receiving devices, or user data with different QoS sent by the sending device to the same receiving device. Specifically, in an application scenario as shown in fig. 1A, the base station 11 may transmit different user data to a plurality of terminal devices 12, for example, the base station transmits 20 bytes of user data to a first terminal device, and transmits 30 bytes of user data to a second terminal device; alternatively, the base station 11 may transmit user data at different information rates to a plurality of terminal apparatuses 12, for example, the base station may transmit user data at an information rate CR1 to a first terminal apparatus and transmit user data at an information rate CR2 to a second terminal apparatus, where CR1 and CR2 are any non-negative real numbers; or, the base station 11 may also send multiple pieces of user data with different QoS to the same terminal device 12, for example, the base station sends both the user data with low latency and high reliability requirements and the user data with low latency requirements or slightly low reliability requirements to the first terminal device, or the base station sends both the user data with low latency and high reliability requirements and the user data with low latency requirements or slightly low reliability requirements to the second terminal device; furthermore, in another application scenario as shown in fig. 1B, the terminal device 12 (first terminal device) may send different user data to a plurality of adjacent terminal devices 12 (second terminal devices), for example, a third terminal device sends 20 bytes of user data to the adjacent first terminal device and 30 bytes of user data to the adjacent second terminal device; alternatively, the terminal device 12 may also send multiple pieces of user data with different QoS to the same terminal device 12, for example, a third terminal device sends both the user data with high reliability requirement and the user data with low delay requirement to the first terminal device, or a third terminal device sends both the user data with high reliability requirement and the user data with low delay requirement to the second terminal device. Of course, the user data may also include other implementation situations, and this is not specifically limited in this embodiment of the application.

S402: the sending equipment cascades or interleaves at least two transmission blocks to obtain a data block after cascading or interleaving;

here, after obtaining at least two transport blocks, the transmitting device concatenates or interleaves the user data to form a data sequence that meets the transmission requirements of the PHY layer, thereby obtaining a concatenated or interleaved data block. In the embodiment of the present application, the concatenated or interleaved data block thus generated is a combination of transport blocks. For example, a concatenated or interleaved data block comprises no less than K bits or bytes, K being a predefined integer, in particular K being 100.

It should be noted that "concatenation" here means that bits in at least two transport blocks are arranged in the transport block unit according to the order of transmission to the PHY layer to form a data sequence; the interleaving is a data sequence formed by arranging bits in at least two transmission blocks out of order and forming bit dispersed arrangement of the same transmission block. In the embodiment of the present application, the combination of at least two transport blocks may also be in other manners, which is not particularly limited.

For example, fig. 5A is a schematic diagram of a concatenated data block in this embodiment, and referring to fig. 5A, a transmission block 131 to be sent by a base station to a first terminal device and a transmission block 132 to be sent by the base station to a second terminal device are concatenated to form a concatenated data sequence, that is, a concatenated data block 13. Alternatively, fig. 5B is a schematic diagram of interleaved data blocks in the embodiment of the present application, and referring to fig. 5B, a transmission block 131 to be sent by the base station to the first terminal device and a transmission block 132 to be sent by the base station to the second terminal device are interleaved to form an interleaved data sequence, that is, an interleaved data block 13.

S403: the transmitting device performs channel coding on the concatenated or interleaved data blocks and transmits the coded code blocks.

Here, after the sending device concatenates or interleaves at least two transport blocks to obtain a data Block through S402, a channel coding module may be used to perform channel coding on the entire data Block to obtain a Code Block (also referred to as a Codeword Code), and then perform a series of processing of rate matching, Code Block concatenation, adjustment, and mapping to the corresponding RE on the Code Block, and send the Code Block to the receiving device.

In practical applications, the channel coding module may perform channel coding on the Code block by using a coding scheme such as Convolutional coding or linear block coding, for example, using any one of cyclic codes (cyclic codes), Hamming codes (Hamming codes), repetition codes (repetition codes), polynomial codes (e.g., bch (bose Chaudhuri hocquenghem) codes, Reed solomon codes, algebraic geometric codes, Reed-Muller (Reed-Muller) codes, complete codes, Golay codes, Tail biting Convolutional (TBCC, Tail Bit Convolutional Code) codes, Turbo codes, low density Parity Check (LDPC, low density Parity Check) codes, Polar codes (Polar codes), product codes, and the like.

It should be noted that the channel coding has a forward error correction function.

In this embodiment of the present application, in order to enable the receiving device to correctly perform channel decoding on user data, the transmitting device needs to notify the receiving device of the coding information for performing channel coding. Specifically, the transmitting device may indicate, by transmitting Control information, such as DCI, SCI, a Media Access Control-Control Element (MAC-CE) or a Radio Resource Control (RRC) message, to the receiving device, coding information of channel coding of the receiving device, such as a coding rate and/or a coding mode of the channel coding; or the sending device may determine the coding information of the channel coding by negotiating with the receiving device in advance, which is not limited in this embodiment of the application.

In the application scenario shown in fig. 1A, the control information may be DCI transmitted by the base station 11 to the terminal device 12, for example, DCI transmitted by the base station 11 to the first terminal device and/or the second terminal device respectively; in the application scenario shown in fig. 1B, the control information may be an SCI sent by a first terminal device in the terminal devices 12 to a second terminal device in the terminal devices 12, for example, an SCI sent by a third terminal device to the first terminal device and/or the second terminal device.

Then, in some possible embodiments, if the sending device indicates the coding information of the channel coding by the receiving device by sending the control information, before S401, the data transmission method may further include: the sending device sends control information, where the control information may include, in addition to the coded information of the channel coding, time-frequency resource location information of the user data, modulation information of the user data, and the like.

As can be seen from the above, in the embodiment of the present application, in a scenario of sending small packet data, a sending device combines a plurality of small packet data into large packet data, and performs channel coding and sending on the large packet data, so that a higher channel coding gain can be obtained, and further, communication reliability and a utilization rate of physical resources are improved.

In this embodiment, in order to further improve the reliability of the wireless communication system, while providing a better error correction capability, a better error check capability is provided, then before the step S402, the data transmission method may further include: the transmitting device generates corresponding first CRC bits for at least one of the at least two transport blocks and adds the first CRC bits correspondingly after the at least one transport block.

Here, in order to provide better error checking capability, the PHY layer may add CRC bits (which may also be referred to as Frame Check Sequences (FCS)) to some or all of the at least two transport blocks after the at least two transport blocks are passed to the PHY layer. Specifically, the sending device may generate corresponding first CRC bits for part or all of the transport blocks according to a preset CRC polynomial, and then correspondingly add the generated first CRC bits to the transport blocks. Next, S402 is executed, when CRC bits are added to a part of the transport blocks, the PHY layer of the transmitting device may cascade or interleave the transport blocks to which the CRC bits are added and the transport blocks to which the CRC bits are not added, so as to obtain a data block after the cascade or interleaving; or, when CRC bits are added to all transport blocks, the PHY layer of the transmitting device may cascade or interleave all transport blocks to which CRC bits are added, so as to obtain a data block after the cascade or interleaving.

In practical applications, the CRC polynomial may be a 16-bit CRC polynomial, a 24-bit CRC polynomial, or a 32-bit CRC polynomial, and of course, CRC polynomials of other CRC versions may be selected according to the requirement of the user on reliability. In the process of data transmission by the sending device and the receiving device, the CRC polynomial may be a CRC polynomial agreed in advance by the sending device and the receiving device, or a CRC polynomial interactively determined by a high-level signaling in the process of data transmission by the sending device and the receiving device, or may be determined by other manners, which is not specifically limited in the embodiment of the present application.

It should be noted that the first CRC bits generated by the sending device for the at least two transport blocks may be generated by the same polynomial or different polynomials according to different requirements of users on reliability, that is, the first CRC bits generated for different transport blocks may be the same or different, so as to achieve the purpose of providing different error protection for different users while improving channel coding gain. Specifically, according to different requirements of users on reliability, the sending device may generate first CRC bits for a first transport block of the at least two transport blocks according to a first polynomial, and generate second CRC bits for a second transport block of the at least two transport blocks according to a second polynomial different from the first polynomial, where the first transport block may be one transport block or multiple transport blocks, and similarly, the second transport block may be one transport block or multiple transport blocks. At this time, the transmitting apparatus generates different first CRC bits for the first transport block and the second transport block. Then, the sending device correspondingly adds the first CRC bits after the first transport block and the second transport block, so that the receiving device performs CRC check on the first transport block and the second transport block.

For example, fig. 6 is a first implementation flow diagram of a data transmission method of two transport blocks in the embodiment of the present application, and referring to fig. 6, a PHY layer of a base station obtains a transport block 131 to be sent to a first terminal device and a transport block 132 to be sent to a second terminal device, which are passed by a MAC layer, and then the PHY layer generates CRC bits 61 for the transport block 131 according to a first polynomial, such as a 32-bit CRC polynomial described below, and generates CRC bits 62 for the transport block 132 according to a second polynomial, such as a 24-bit CRC polynomial described below, and then the PHY layer adds the CRC bits 61 after the transport block 131, and at the same time, the PHY layer adds the CRC bits 62 after the transport block 132. Then, the PHY layer concatenates or interleaves the transport block 131 and the transport block 132 to which the CRC bits are added, to obtain the concatenated or interleaved data block 13. Next, the PHY layer performs channel coding on the concatenated or interleaved data block 13 and transmits the coded code block 13 a.

Wherein, the 32-bit polynomial p (x) has the following formula:

P(x)＝x³²+x²⁶+x²³+x²²+x¹⁶+x¹²+x¹¹+x¹⁰+x⁸+x⁷+x⁵+x⁴+x²+x+1

the above 24-bit polynomial p (x) has the following formula:

P(x)＝x²⁴+x²³+x⁶+x⁵+x+1

in this embodiment of the present application, in addition to performing CRC addition on at least one transport block before a data block obtained by at least two transport blocks through concatenation or interleaving, the sending device may also perform CRC addition on the data block obtained by concatenation or interleaving, and then after S402, the data transmission method may further include: the sending equipment generates a corresponding second CRC bit for the data block obtained by cascading or interleaving; the transmitting device adds a second CRC bit after concatenating or interleaving the resulting data block. For example, fig. 7 is a schematic diagram of a second implementation flow of a data transmission method of two transport blocks in this embodiment, and referring to fig. 7, a PHY layer of a base station concatenates or interleaves a transport block 131 to be sent to a first terminal device and a transport block 132 to be sent to a second terminal device to obtain a concatenated or interleaved data block 13, then the PHY layer generates corresponding CRC bits 71 for the data block 13, adds the generated CRC bits 71 to the data block 13, then performs channel coding on the data block 13 to which the CRC bits 71 are added, and sends a coded code block 13 a.

Here, the second CRC bits added after the concatenated or interleaved data block may be generated according to a 16-bit CRC polynomial, may be generated according to a 24-bit CRC polynomial, may be generated according to a 32-bit CRC polynomial, and may be generated according to CRC polynomials of other CRC versions according to a requirement of a user for a reliability point. In the process of data transmission by the sending device and the receiving device, the CRC polynomial may be a CRC polynomial agreed in advance by the sending device and the receiving device, or a CRC polynomial interactively determined by a high-level signaling in the process of data transmission by the sending device and the receiving device, and of course, the CRC polynomial may also be determined in other manners, which is not specifically limited in the embodiment of the present application.

Certainly, in order to further provide better power for error checking and improve reliability of the wireless communication system, the sending device may further combine the two CRC bit adding manners, that is, first add first CRC bits to at least one of the at least two transport blocks, then cascade or interleave the transport blocks to obtain a data block after cascade or interleave, then add second CRC bits to the data block after cascade or interleave to obtain a data block to which the second CRC bits are added, and finally perform channel coding on the data block to which the CRC bits are added to generate a code block and send the code block.

For example, fig. 8 is a schematic flow chart of a third implementation of a data transmission method for two transport blocks in this embodiment, referring to fig. 8, a PHY layer of a base station obtains a transport block 131 to be sent to a first terminal device and a transport block 132 to be sent to a second terminal device, which are transferred by a MAC layer, and then the PHY layer generates CRC bits 61 for the transport block 131 according to a first polynomial, such as a CRC polynomial of 32 bits mentioned above, and generates CRC bits 62 for the transport block 132 according to a second polynomial, such as a CRC polynomial of 24 bits mentioned above, and then the PHY layer adds the CRC bits 61 after the transport block 131, and at the same time, the PHY layer adds the CRC bits 62 after the transport block 132. Then, the PHY layer concatenates or interleaves the transport block 131 to which the CRC bits are added and the transport block 132, and concatenates or interleaves the resultant data block 13. The PHY layer again generates corresponding CRC bits 71 for the data block 13, adds the CRC bits to the data block 13, and finally performs channel coding on the CRC-bit-added data block 13 and transmits the coded code block 13 a.

In the embodiment of the application, the transmitting device adds the CRC bits again after the data block formed by cascading or interleaving the plurality of transport blocks to which the CRC bits are respectively added, so that the receiving device performs multi-stage CRC check on the code block while decoding the code block after demodulating the code block, thereby improving the error detection capability of the wireless communication system and further improving the reliability of the wireless communication system.

The second embodiment of the application:

based on the foregoing embodiment, to further improve the channel coding gain, the transmitting device may perform multi-level channel coding on at least one of the at least two transport blocks. Specifically, fig. 9 is a schematic flowchart of a second implementation flow of a data transmission method on a sending device side in the embodiment of the present application, and referring to fig. 9, the data transmission method includes:

s901: the sending equipment obtains at least two transmission blocks;

it should be noted that the execution process of the above S901 is the same as the execution process of the above S401, and is not described herein again.

S902: the sending equipment carries out primary channel coding on at least one transmission block in at least two transmission blocks;

here, after obtaining at least two transport blocks delivered by the MAC layer, the PHY layer of the transmitting device performs first-level channel coding on some or all of the at least two transport blocks according to the requirement on reliability for different users. The first-stage channel coding may be convolutional coding or linear block coding, for example, the first-stage channel coding may use any one of cyclic codes (cyclic codes), Hamming codes (Hamming codes), repetition codes (repetition codes), polynomial codes (e.g., BCH codes, Reed-Solomon codes, algebraic geometric codes, Reed-Muller codes, complete codes, Golay codes, TBCC codes, Turbo codes, LDPC codes, Polar codes, product codes, and the like for channel coding, and of course, the first-stage channel coding may also use other coding methods, which is not limited in this embodiment.

S903: the sending equipment cascades or interleaves at least two transmission blocks to obtain a cascaded or interleaved data block;

here, after performing the first-level channel coding on part of the at least two transport blocks through S902, the PHY layer of the transmitting device may concatenate or interleave the coded data blocks, that is, the first-level code blocks and other transport blocks that are not subjected to the first-level channel coding, to generate concatenated or interleaved data blocks. After performing the first-level channel coding on all the at least two transport blocks through S902, the PHY layer of the transmitting device may concatenate or interleave the coded first-level code blocks to generate concatenated or interleaved data blocks.

S904: the transmitting device performs second-level channel coding on the concatenated or interleaved data block and transmits the coded code block.

Here, the PHY layer of the transmitting device performs channel coding on the entire concatenated or interleaved data block as in S403, that is, performs second-level channel coding on the entire concatenated or interleaved data block obtained in S903, and obtains a coded code block, that is, a second-level code block. Then, the PHY layer performs a series of processing, such as rate matching, code block concatenation, adjustment, and mapping to the corresponding RE, on the second-level code block, and then sends the second-level code block to the receiving device. The second-level channel coding may use the same coding method as the first channel coding, that is, the second-level channel coding may also use convolutional coding or linear block coding, for example, the second-level channel coding uses one of cyclic codes (cyclic codes), Hamming codes (Hamming codes), repetition codes (repetition codes), polynomial codes (for example, BCH codes, Reed-Solomon codes, algebraic geometric codes, Reed-Muller codes, complete codes, Golay codes, TBCC codes, Turbo codes, LDPC codes, Polar codes, product codes, and the like for channel coding, which is the same as the first-level channel coding and is not specifically limited thereto.

It should be noted that both the first-stage channel coding and the second-stage channel coding have a forward error correction function.

In the embodiment of the present application, in order for the receiving device to correctly perform channel decoding on the user data, the sending device needs to notify the receiving device of the coding information for performing channel coding on the user data. Specifically, the transmitting device may indicate the coding information of the channel coding, such as the code rate and/or the coding mode of the channel coding, of the receiving device by transmitting control information, such as DCI, SCI, MAC-CE, or RRC message, to the receiving device; or the sending device may determine the coding information of the channel coding by negotiating with the receiving device in advance, which is not limited in this embodiment of the application.

Consistent with the foregoing embodiment, in the application scenario shown in fig. 1A, the control information may be DCI transmitted by the base station 11 to the terminal device 12, for example, DCI transmitted by the base station 11 to the first terminal device and/or the second terminal device respectively; in the application scenario shown in fig. 1B, the control information may be SCIs sent by a first terminal device in the terminal devices 12 to a second terminal device in the terminal devices 12, for example, SCIs sent by a third terminal device to the first terminal device and/or the second terminal device, respectively.

Then, in some possible embodiments, if the sending device indicates the coding information of the channel coding by the receiving device by sending the control information, before S901, the data transmission method may further include: the transmitting device transmits the control information. Here, fig. 10 is another schematic diagram of the control information indicating the user data information in the embodiment of the present application, referring to fig. 10, the control information 101 may indicate user data information 102 of the terminal device, specifically, the control information 101 may include coding information of a first level channel coding and coding information of a second level channel coding of the user data, and of course, the control information 101 may also include other user data information of the receiving device, such as time-frequency resource location information of the user data, modulation information of the user data, and the like, which is not specifically limited in the embodiment of the present application.

In the embodiment of the present application, before at least two transport blocks are cascaded or interleaved into a data block, a first-stage channel coding is performed on at least one transport block, and the coded code block and the uncoded transport block are cascaded or interleaved to generate a cascaded or interleaved data block, so as to further perform a second-stage channel coding on the cascaded or interleaved data block.

In this embodiment, in order to further improve the reliability of the wireless communication system, while providing a better error correction capability, a better error check capability is provided, then before the step S902, the data transmission method may further include: the sending equipment generates a corresponding first CRC bit for at least one of at least two transmission blocks; a first CRC bit is correspondingly added after at least one transport block.

Here, the process of specifically adding the first CRC bit is consistent with the process of adding the first CRC bit to at least one transport block in the above embodiment, and is not described herein again.

It should be noted that, after adding the first CRC bit to at least one transport block, the PHY layer of the transmitting device may perform first-level channel coding on all of the at least two transport blocks to obtain the first-level code block.

Further, in this embodiment of the present application, in addition to CRC adding on at least one transport block, the sending device may also perform CRC adding on the concatenated or interleaved data block, and then after S903, the data transmission method may further include: generating corresponding second CRC bits for the concatenated or interleaved data blocks; a second CRC bit is added after the concatenated or interleaved data block.

The process of adding the second CRC bit is the same as the process of adding the second CRC bit to the concatenated or interleaved data block in the above embodiment, and details are not repeated here.

It should be noted that, after adding the second CRC bits to the concatenated or interleaved data block, the PHY layer of the transmitting device may perform the second-level channel coding on the concatenated or interleaved data block to obtain the second-level code block.

For example, fig. 11 is a fourth implementation flow diagram of a data transmission method of two transport blocks in this embodiment, referring to fig. 11, a PHY layer of a base station obtains a transport block 131 to be sent to a first terminal device and a transport block 132 to be sent to a second terminal device, which are transferred by a MAC layer, and then the PHY layer generates CRC bits 61 for the transport block 131 according to a first polynomial, such as the above 32-bit CRC polynomial, and generates CRC bits 62 for the transport block 132 according to a second polynomial, such as the above 24-bit CRC polynomial, and then the PHY layer adds the CRC bits 61 after the transport block 131, and at the same time, the PHY layer adds the CRC bits 62 after the transport block 132. Next, the PHY layer performs first-level channel coding on the transport block 131 to which the CRC bits 61 are added and the transport block 132 to which the CRC bits 62 are added, and then concatenates or interleaves the coded transport block (i.e., the code block 131a) and the coded transport block (i.e., the code block 132a), so as to obtain the concatenated or interleaved data block 13. Thereafter, the PHY layer generates corresponding CRC bits 71 for the data block 13, adds the generated CRC bits 71 to the data block 13, then performs second-level channel coding on the data block 13 to which the CRC bits 71 are added, and transmits the coded code block 13 a.

In the embodiment of the application, the CRC bits are added again after the data block formed by cascading or interleaving the plurality of transport blocks to which the CRC bits are added, so that the receiving device performs multi-stage CRC check on the code block while decoding the code block after demodulating the code block, and thus the error detection capability of the wireless communication system can be improved, and the reliability of the wireless communication system is further improved.

Several data transmission schemes in the above embodiments are compared below by taking the example of sending user data to two terminal devices, respectively.

First, three data transmission schemes involved in comparison will be explained.

The first scenario (Alt1), namely: independently performing 32-bit CRC addition on transmission blocks to be sent to the first terminal equipment and the second terminal equipment, independently performing LDPC channel coding, and then mapping to physical resources;

the second scenario (Alt2), namely: user data to be sent to a first terminal device and a second terminal device are cascaded or interleaved, 32-bit CRC addition is carried out on the data blocks after the cascade connection or the interleaving, LDPC channel coding is carried out on the data blocks after the cascade connection or the interleaving, and then the data blocks are mapped to physical resources;

the third scenario (Alt3), namely: respectively performing 32-bit CRC addition on transmission blocks to be sent to the first terminal equipment and the second terminal equipment, and then performing first-stage channel coding on the transmission blocks to be sent to the first terminal equipment, wherein a first-stage channel coder is the coding of a Reed-Solomon code, and parameters are RS (52, 48); cascading or interleaving the coded first-level code block and the transmission block which is not coded by the first-level channel to obtain a data block which is cascaded or interleaved, then carrying out LDPC coding on the data block, and finally mapping the data block to physical resources.

It should be noted that, of the three schemes, the second scheme and the third scheme are the data transmission methods in the first embodiment and the second embodiment of the present application.

In order to ensure fairness, the total number of physical resources in the three data transmission schemes is the same, and the LDPC coding scheme adopted is the channel coding scheme in NR R15.

Fig. 12 to 14 are schematic diagrams of three simulations of the data transmission method in the embodiment of the present application, and referring to fig. 12 to 14, the three data transmission schemes are performed by using the parameters in table 1 below, where the signal-to-noise ratio of user 2 is 1dB higher than that of user 1.

TABLE 1

In fig. 12 and 13, Modulation is performed by using a Modulation scheme such as Quadrature Phase Shift Keying (QPSK) when transmitting encoded code blocks, and Quadrature Amplitude Modulation (QAM) including 16 symbols is performed when transmitting encoded code blocks in fig. 14. Of course, in practical applications, when the sending device sends the coded code block, other debugging manners may also be used to perform signal modulation, and this embodiment of the present application is not particularly limited.

It should be noted that, the numbers in the columns of the first terminal device and the second terminal device in the table correspond to different lengths after modulation and coding, that is, the total code length after channel coding or the number of bits of the code word.

Then, as can be seen from fig. 12 to 14, the third solution has a significant performance advantage under high reliability requirements.

The third embodiment of the application:

based on the same inventive concept as the method, the embodiment of the present application provides a data transmission method, which can be applied to a receiving device in the wireless communication system, where the receiving device can be a terminal device in the wireless communication system.

Fig. 15 is a schematic flow chart of a first implementation of a data transmission method on a receiving device side in an embodiment of the present application, and referring to fig. 15, the data transmission method includes:

s1501: receiving equipment receives code blocks to be decoded, which are sent by sending equipment;

here, the PHY layer of the receiving device may receive a signal transmitted by the base station, or may receive a signal transmitted by another terminal device, and then the PHY layer performs processing such as channel estimation and channel equalization on the received signal to obtain a code block to be decoded.

For example, in an application scenario as shown in fig. 1A, the terminal device 12 may receive a signal transmitted by the base station 11 and obtain a code block to be decoded therefrom, e.g., the first terminal device or the second terminal device receives the signal transmitted by the base station 11 and obtains the code block to be decoded therefrom; in another application scenario as shown in fig. 1B, the terminal device 12 may further receive a signal transmitted by another terminal device 12 and obtain the code block to be decoded therefrom, for example, the first terminal device or the second terminal device receives a signal of a third terminal device and obtain the code block to be decoded therefrom.

S1502, the receiving device carries out channel decoding on the code block to be decoded to obtain a decoded data block;

here, the PHY layer of the receiving device performs channel decoding on the code block to be decoded, and the obtained decoded data block is obtained by cascading or interleaving at least two transport blocks, that is, the concatenated or interleaved data block in the above embodiment.

In this embodiment of the application, the decoded data block may include different user data sent by the sending device to at least two receiving devices, or user data with different QoS sent by the sending device to the same receiving device. Specifically, in an application scenario as shown in fig. 1A, the base station 11 may transmit different user data to a plurality of terminal devices 12, for example, the base station transmits 20 bytes of user data to a first terminal device, and transmits 30 bytes of user data to a second terminal device; alternatively, the base station 11 may transmit user data at different information rates to a plurality of terminal apparatuses 12, for example, the base station may transmit user data at an information rate CR1 to a first terminal apparatus and transmit user data at an information rate CR2 to a second terminal apparatus, where CR1 and CR2 are any non-negative real numbers; or, the base station 11 may also send multiple pieces of user data with different QoS to the same terminal device 12, for example, the base station sends both the user data with low latency and high reliability requirements and the user data with low latency requirements or slightly low reliability requirements to the first terminal device, or the base station sends both the user data with low latency and high reliability requirements and the user data with low latency requirements or slightly low reliability requirements to the second terminal device; furthermore, in another application scenario as shown in fig. 1B, the terminal device 12 (first terminal device) may send different user data to a plurality of adjacent terminal devices 12 (second terminal devices), for example, a third terminal device sends 20 bytes of user data to the adjacent first terminal device and 30 bytes of user data to the adjacent second terminal device; alternatively, the terminal device 12 may also send multiple pieces of user data with different QoS to the same terminal device 12, for example, a third terminal device sends both the user data with high reliability requirement and the user data with low delay requirement to the first terminal device, or a third terminal device sends both the user data with high reliability requirement and the user data with low delay requirement to the second terminal device. Of course, the user data may also include other implementation situations, and this is not specifically limited in this embodiment of the application.

In practical applications, the transmitting device may indicate the encoded information of the channel coding by transmitting control information, such as DCI, SCI, MAC-CE, RRC message, etc., to the receiving device; or the transmitting device may determine the coding information of the channel coding by pre-negotiating with the receiving device.

In some possible embodiments, if the sending device notifies the receiving device of channel coding information when channel coding the user data by sending the control information, before S1501, the data transmission method may further include: the receiving device receives control information sent by the sending device, where the control information may include coded information of channel coding, and of course, the control information may also include time-frequency resource location information of user data, modulation information of user data, and the like.

S1503, the receiving device carries out de-concatenation or de-interleaving on the decoded data block to obtain a target transmission block of the receiving device.

Here, after obtaining the decoded data block, the PHY layer of the receiving device may separate a target transport block, which is sent by the sending device to the receiving device to which the PHY layer belongs, from the decoded data block according to DCI or SCI sent by the sending device, and then, the PHY layer transfers the target transport block to the MAC layer of the receiving device. When the sending device generates the decoded data block in a cascade or interleave manner, the PHY layer of the receiving device separates the target transport block corresponding to the receiving end in a corresponding de-cascade or de-interleave manner. For example, the first terminal device de-concatenates or de-interleaves the target transport block sent to the first terminal device by the sending device from the decoded data block; and the second terminal equipment de-concatenates or de-interleaves the decoded data block to obtain a target transmission block which is sent to the second terminal equipment by the sending equipment.

Thus, the terminal device obtains the user data sent to itself by the sending device.

In the embodiment of the application, in a scene of sending the small packet data, the plurality of small packet data are combined into the big packet data, and the big packet data is subjected to channel coding and sending, so that higher channel coding gain can be obtained, and further, the communication reliability and the utilization rate of physical resources are improved.

In this embodiment, in order to further improve the reliability of the wireless communication system, and provide better error correction capability and better error check capability at the same time, the transmitting device adds the second CRC bit to the concatenated or interleaved data block after generating the data block, and then correspondingly, after the receiving device decodes the decoded data block, it needs to perform CRC check on the decoded data block, and after S1502, the data transmission method may further include: and the receiving equipment performs CRC on the decoded data block.

It should be noted that, when performing CRC check on the decoded data block, the PHY layer of the receiving device may perform CRC check according to a CRC polynomial agreed with the transmitting device in advance, or may perform CRC check according to a CRC polynomial interactively determined by the transmitting device and the receiving device through a high-layer signaling in the data transmission process. Of course, the polynomial of the CRC check may also be determined in other manners, as long as the polynomial is consistent with the polynomial when the sending device adds the CRC bits, and the embodiment of the present application is not particularly limited.

In this embodiment of the present application, in addition to adding the second CRC bit to the concatenated or interleaved data block, the sending device may also add the first CRC bit to at least one transport block before the at least two transport blocks are concatenated or interleaved, and then, correspondingly, after the receiving device performs S1503 to obtain the target transport block, the data transmission method may further include: and performing CRC check on the target transmission block.

Here, when performing CRC check on the target transport block obtained by the de-concatenation or de-interleaving, the PHY layer of the receiving device may perform CRC check according to a CRC polynomial agreed in advance with the transmitting device, or may perform CRC check according to a CRC polynomial interactively determined by a higher layer signaling during data transmission between the transmitting device and the receiving device. Of course, the polynomial of the CRC check may also be determined in other manners, as long as the polynomial is consistent with the polynomial when the sending device adds the CRC bits, and the embodiment of the present application is not particularly limited. Because the transmitting device adds different CRC bits to different user data, different error protection can be provided for different users while improving the channel coding gain.

In the embodiment of the application, after a data block formed by cascading or interleaving a plurality of transport blocks to which first CRC bits are respectively added, second CRC bits are added to the data block again, so that after receiving a code block to be decoded, a receiving device performs multi-level CRC check on the code block to be decoded, thereby further improving the error detection capability of the wireless communication system and further improving the reliability of the wireless communication system.

The fourth embodiment of the application:

based on the foregoing embodiment, to further improve the channel coding gain, the transmitting device may perform multi-level channel coding on at least two transport blocks. Accordingly, the receiving apparatus can perform multi-level coding on the code block to be coded. Specifically, fig. 16 is a schematic flow chart of a second implementation of the data transmission method on the receiving device side in the embodiment of the present application, and referring to fig. 16, the data transmission method includes:

s1601: receiving equipment receives code blocks to be decoded, which are sent by sending equipment;

it should be noted that the execution process of S1601 is identical to the execution process of S1501, and is not described herein again.

S1602, the receiving equipment performs second-level channel decoding on the code block to be decoded to obtain a decoded data block;

s1603, the receiving equipment performs de-concatenation or de-interleaving on the decoded data block to obtain the data block of the receiving equipment;

s1604: the receiving device carries out first-stage channel decoding on the data block of the receiving device to obtain a target transmission block of the receiving device.

Here, after obtaining the code blocks to be decoded, the PHY layer of the receiving device performs channel decoding on the code blocks to be decoded in S1602, that is, performs second-level channel decoding corresponding to the second-level channel coding in the above-described embodiment on the code blocks to be decoded, thereby obtaining decoded data blocks. Then, since the decoded data block is obtained by concatenating or interleaving at least two transport blocks, the PHY layer may perform, through S1603, the de-concatenation or de-interleaving on the decoded data block to obtain a data block of the receiving device, and then perform, through S1603, the first-level channel decoding corresponding to the first-level channel encoding in the above embodiment on the data block of the receiving device to obtain a target transport block corresponding to the receiving device, and finally, the PHY layer transfers the obtained target transport block to the MAC layer of the receiving device.

In practical applications, in order for the receiving device to correctly perform channel decoding on the user data, the transmitting device needs to notify the receiving device of the coding information for performing channel coding on at least two transport blocks. Specifically, the transmitting device may notify the receiving device of the coding information of the channel coding, such as the coding rate and/or the coding mode of the channel coding, by transmitting control information, such as DCI, SCI, MAC-CE, or RRC message, to the receiving device; or the transmitting device may determine the coding information of the channel coding by pre-negotiating with the receiving device.

In some possible embodiments, if the sending device notifies the receiving device of the encoded information of the channel coding by sending the control information, before S1602, the data transmission method may further include: referring to fig. 10, the control information 101 may indicate user data information 102 of the terminal device, specifically, the control information 101 may include coding information of a first level channel coding and coding information of a second level channel coding, and of course, the control information 101 may also include other user data information of the receiving device, such as time-frequency resource location information of the user data, modulation information of the user data, and the like, which is not specifically limited in this embodiment of the application.

Accordingly, S1602 may include: the receiving equipment carries out second-level channel decoding on the code block to be decoded according to the coding information of the second-level channel coding; s1064 may include: the receiving device carries out first-stage channel decoding on the data block of the receiving device according to the coding information of the first-stage channel coding.

In the embodiment of the application, the error correction capability of the wireless communication system is improved by carrying out multi-stage channel decoding on the code block to be decoded from the transmitting device, so that the communication reliability is further improved.

In this embodiment, in order to further improve the reliability of the wireless communication system, and provide a better error correction capability and a better error check capability at the same time, the transmitting device adds a second CRC bit to the concatenated or interleaved data block after generating the data block, and accordingly, after the receiving device decodes the decoded data block, the CRC check needs to be performed on the decoded data block, and after S1602, the data transmission method may further include: and the receiving equipment performs CRC on the decoded data block. Here, the process of performing CRC on the decoded data block is the same as the process of performing CRC on the decoded data block in the above embodiment, and details are not repeated here.

In this embodiment of the present application, in addition to adding the second CRC bit to the concatenated or interleaved data block, the sending device may also add the first CRC bit to at least one transport block before the at least two transport blocks are concatenated or interleaved, and then, correspondingly, after the receiving device performs S1604 to obtain the target transport block, the data transmission method may further include: and performing CRC check on the target transmission block. Here, the process of specifically performing CRC check on the target transport block is the same as the process of performing CRC check on the target transport block in the foregoing embodiment, and details are not repeated here.

Based on the same inventive concept as the method described above, an embodiment of the present application provides a communication apparatus, which may be a channel coding apparatus or a chip or a system on a chip in the channel coding apparatus, and may also be a functional module in the channel coding apparatus for implementing the data transmission method on the transmitting device side described in any of the above embodiments. The communication apparatus may implement the functions performed by the sending device in the above embodiments, and the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, fig. 17 is a first structural schematic diagram of a communication device in the embodiment of the present application, and referring to solid lines in fig. 17, the communication device 1700 may include: an obtaining module 1701 for obtaining at least two transport blocks; a multiplexing module 1702, configured to cascade or interleave at least two transmission blocks to obtain a data block after cascade or interleave; a second encoding module 1703, configured to perform second-level channel encoding on the concatenated or interleaved data block; a sending module 1704, configured to send the encoded code block.

In this embodiment, referring to fig. 17 showing a dotted line, the communication apparatus 1700 may further include: a first encoding module 1705, configured to perform a first level channel coding on at least one transport block of the at least two transport blocks before the multiplexing module concatenates or interleaves the at least two transport blocks.

In this embodiment of the present application, the sending module is further configured to send control information, where the control information is used to indicate coding information of the first-level channel coding and coding information of the second-level channel coding.

In this embodiment, the encoding information includes a code rate and/or a channel encoding mode.

In an embodiment of the present application, the control information includes at least one of the following information: DCI, SCI, MAC-CE, or RRC message.

Of course, in practical applications, the coding information and the control information may also include other information, and the embodiment of the present application is not particularly limited.

In an embodiment of the present application, the communication apparatus may further include: a first CRC adding module, configured to generate corresponding first CRC bits for at least one transport block of the at least two transport blocks; a first CRC bit is correspondingly added to at least one transport block.

In this embodiment, the first CRC bits corresponding to different transport blocks in the at least two transport blocks are different.

In an embodiment of the present application, the communication apparatus may further include: a second CRC adding module, configured to generate a corresponding second CRC bit for the concatenated or interleaved data block after the concatenated or interleaved data block is obtained by the multiplexing module; a second CRC bit is added after the concatenated or interleaved data block.

In practical applications, the above communication apparatus may be applied to a PHY layer of a base station or a terminal device. Taking a base station as an example, fig. 18 is another schematic structural diagram of a Medium Access Control (MAC) layer and a Physical (PHY) layer of the base station in the embodiment of the present application, referring to fig. 18, a MAC layer 1011 of a base station 11 respectively transmits user data to be transmitted to different terminal devices, for example, user data sent to a first terminal device and user data sent to a second terminal device are transmitted to PHY layer 1012 by using transport blocks, PHY layer 1012 concatenates or interleaves these transport blocks to generate concatenated or interleaved data blocks, and then performs a series of processing of channel coding and rate matching, code block concatenation and modulation and mapping to corresponding REs on the concatenated or interleaved data blocks, it can be seen that user data to be sent to different terminal devices is multiplexed to PHY layer 1012 of base station 11, therefore, higher channel coding gain is obtained, and further, the communication reliability and the utilization rate of physical resources are improved.

It should be further noted that, for the specific implementation processes of the obtaining module 1701, the multiplexing module 1702, the first encoding module 1705, the second encoding module 1703, and the sending module 1704, reference may be made to the detailed description of the embodiments in fig. 4 and fig. 9, and for brevity of the description, no further description is given here.

The obtaining module can be an input interface, an input circuit or a receiver; the sending module can be an output interface, an input circuit, a transmitter, or the like. The other modules (e.g., the multiplexing module, the first encoding module, the second encoding module, the first CRC addition module, or the second CRC addition module) may be one or more processors.

For example, fig. 19 is a schematic structural diagram of a transmitting device in the embodiment of the present application, see fig. 19, in the sending device 190, the user data to be sent to the first terminal device (or the user data 1 to be sent to the first terminal device) and/or the user data to be sent to the second terminal device (or the user data 2 to be sent to the first terminal device) are respectively input to the first-stage channel coding module 191 by using a transmission block, then are respectively input to the cascading or interleaving module 192 by the first-stage channel coding module 191 for cascading or interleaving, output the data blocks after cascading or interleaving, and then, the data blocks after cascading or interleaving are input to the second-stage channel coding module 193, and sequentially output to the processing modules 194 for rate matching, code block concatenation, modulation, resource mapping, etc., and finally generate a transmission signal and transmit it by the signal transmission module 195.

Based on the same inventive concept as the method described above, an embodiment of the present application provides a communication apparatus, which may be a channel decoding apparatus or a chip or a system on a chip in the channel decoding apparatus, and may also be a functional module in the channel decoding apparatus for implementing the data transmission method on the receiving device side described in the above embodiment. The communication apparatus may implement the functions performed by the receiving device in the above embodiments, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. For example, fig. 20 is a schematic diagram of a second structure of the communication device in the embodiment of the present application, and referring to solid lines in fig. 20, the communication device 2000 may include: a receiving module 2001, configured to receive a code block to be decoded sent by a sending device; a second decoding module 2002, configured to perform second-level channel decoding on a code block to be decoded to obtain a decoded data block, where the decoded data block is obtained by cascading or interleaving at least two transmission blocks; and a demultiplexing module 2003, configured to perform de-concatenation or de-interleaving on the decoded data block to obtain a target transmission block of the receiving device.

In this embodiment, the demultiplexing module may be specifically configured to perform de-concatenation or de-interleaving on the decoded data block to obtain a data block of the receiving device; referring to fig. 20, the communication device 2000 may further include: the first decoding module 2004 may be further configured to perform first-level channel decoding on the data block of the receiving device to obtain a target transport block.

In this embodiment of the application, the receiving module is further configured to receive control information sent by the sending device, where the control information is used to indicate coding information of the first-level channel coding and coding information of the second-level channel coding.

Here, the first-level channel coding is channel coding for at least one of the at least two transport blocks, and the second-level channel coding is channel coding for a data block after concatenation or interleaving of the at least two transport blocks; correspondingly, the first decoding module may be configured to perform first-level channel decoding on a data block of the receiving device according to the coding information of the first-level channel coding; the second decoding module may be configured to perform channel decoding on the code block to be decoded according to the coding information of the second-level channel coding.

Here, the first decoding module corresponds to the first encoding module in the above embodiment, and the second decoding module corresponds to the second encoding module in the above embodiment.

In an embodiment of the present application, the communication apparatus may further include: and the first CRC check module is used for performing CRC check on the decoded data block.

In an embodiment of the present application, the communication apparatus may further include: and the second CRC check module is used for carrying out CRC check on the target transmission block.

It should be further noted that, for the specific implementation process of the receiving module 2001, the first decoding module 2004, the second decoding module 2002, and the demultiplexing module 2003, reference may be made to the detailed description of the embodiments in fig. 15 and fig. 16, and for the brevity of the description, no further description is given here.

The receiving module may be an input interface, an input circuit, a receiver, or the like. The other modules (e.g., the demultiplexing module, the first decoding module, the second decoding module, the first CRC check module, or the second CRC check module) may be one or more processors.

In a specific implementation process, fig. 21 is a schematic structural diagram of a receiving device in an embodiment of the present application, and referring to fig. 21, in the receiving device 210, for example, in a first terminal device, the first terminal device processes a received signal from a sending device through a processing module 211 for receiving a signal, estimating a channel, equalizing a channel, and the like, and outputs a code block to be decoded, the code block to be decoded is input into a second-level channel decoding module 212, the second-level channel decoding module 212 decodes the code block to output a decoded data block, the decoded data block is input into a de-concatenation or de-interleaving module 213 for separation, and a data block corresponding to the first terminal device is output, the data block corresponding to the first terminal device is input into a first-level channel decoding module 214 for decoding, and finally user data sent by the sending device to the first terminal device (or user data 1 sent to the first terminal device) is output.

Similarly, fig. 22 is another schematic structural diagram of the receiving apparatus in the embodiment of the present application, see fig. 22, in the receiving device 220, for example, in a second terminal device, the second terminal device processes a received transmission signal from the transmitting device through a processing module 221 for receiving a signal, estimating a channel, equalizing a channel, and the like, and outputs a code block to be decoded, the code block to be decoded is input into a second-level channel decoding module 222, the second-level channel decoding module 222 decodes the code block to output a decoded data block, the decoded data block is input into a de-concatenation or de-interleaving module 223 for separation, and a data block corresponding to the second terminal device is output, the data block corresponding to the second terminal device is input into a first-level channel decoding module 224 for decoding, and finally user data (or user data 2) sent to the first terminal device by a sending end is output.

Based on the same inventive concept as the method described above, the embodiments of the present application provide a communication apparatus, which may be a chip in a transmitting device or a system on a chip. The communication device may implement the functions performed by the transmitting apparatus in one or more of the embodiments described above, and these functions may be implemented by hardware. Such as: in a possible embodiment, fig. 23 is a schematic diagram of a third structure of the communication device in the embodiment of the present application, and referring to solid lines in fig. 23, the communication device 2300 may include: the processor 2301 and the communication interface 2302, the processor 2301 may be configured to support the communication apparatus 2300 to implement the functions involved in any sending device side data transmission method in the foregoing embodiments, for example: the processor may transmit the encoded code blocks to a receiving device through the communication interface.

In yet another possible embodiment, referring to the dashed line in fig. 23, the communication device 2300 may further include: memory 2303, for storing computer-executable instructions and data necessary for communication device 2300. When the communication apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the communication apparatus executes the steps of any one of the sending device-side data transmission methods in the above embodiments.

Based on the same inventive concept as the method described above, the embodiments of the present application provide a communication apparatus, which may be a chip in a receiving device or a system on a chip. The communication means may implement the functions performed by the receiving device in one or more of the embodiments described above, which functions may be implemented by hardware. Such as: in one possible embodiment, still shown in solid lines in fig. 23, the communication device 2300 may include: the processor 2301 and the communication interface 2302, the processor 2301 may be configured to support the communication apparatus 2300 to implement the functions involved in any receiving device side data transmission method in the foregoing embodiments, for example: the processor may receive, via the communication interface, a transmission device to transmit a block to be decoded.

In yet another possible implementation, still referring to the dashed lines in fig. 23, the communication device 2300 may further include a memory 2303, the memory 2303 being used for storing computer-executable instructions and data necessary for the communication device 2300. When the communication apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the communication apparatus executes the steps of any one of the receiving device-side data transmission methods in the above embodiments.

Based on the same inventive concept as the above method, embodiments of the present application provide a computer-readable storage medium storing instructions for performing the steps of any of the data transmission methods in the above embodiments when the instructions are executed on a computer.

Based on the same inventive concept as the method, the embodiment of the application provides a wireless communication system, which comprises a sending device and a receiving device; the sending device is configured to execute the step of any sending device side data transmission method in the foregoing embodiments; and the receiving device is used for executing the steps of the data transmission method on any receiving device side in the embodiment.

Those of skill in the art will appreciate that the functions described in connection with the various illustrative logical blocks, modules, and algorithm steps described in the disclosure herein may be implemented as hardware, software, firmware, or any combination thereof. If implemented in software, the functions described in the various illustrative logical blocks, modules, and steps may be stored on or transmitted over as one or more instructions or code on a computer-readable medium and executed by a hardware-based processing unit. The computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or any communication medium including a medium that facilitates transfer of a computer program from one place to another (e.g., according to a communication protocol). In this manner, a computer-readable medium may generally correspond to (1) a non-transitory tangible computer-readable storage medium, or (2) a communication medium, such as a signal or carrier wave. A data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, code and/or data structures for implementing the techniques described herein. The computer program product may include a computer-readable medium.

By way of example, and not limitation, such computer-readable storage media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transitory media, but are instead directed to non-transitory tangible storage media. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

The instructions may be executed by one or more processors, such as one or more Digital Signal Processors (DSPs), general purpose microprocessors, Application Specific Integrated Circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuitry. Thus, the term "processor," as used herein may refer to any of the foregoing structure or any other structure suitable for implementation of the techniques described herein. Additionally, in some aspects, the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided within dedicated hardware and/or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.

The techniques of this application may be implemented in a wide variety of devices or apparatuses, including a wireless handset, an Integrated Circuit (IC), or a set of ICs (e.g., a chipset). Various components, modules, or units are described in this application to emphasize functional aspects of means for performing the disclosed techniques, but do not necessarily require realization by different hardware units. Indeed, as described above, the various units may be combined in a codec hardware unit, in conjunction with suitable software and/or firmware, or provided by an interoperating hardware unit (including one or more processors as described above).

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only an exemplary embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, comprising:

the sending equipment obtains at least two transmission blocks;

the sending equipment cascades or interleaves the at least two transmission blocks to obtain a cascaded or interleaved data block;

and the sending equipment carries out second-stage channel coding on the cascaded or interleaved data block and sends a coded code block.

2. The method of claim 1, wherein before concatenating or interleaving the at least two transport blocks to obtain a concatenated or interleaved data block, the method further comprises:

the transmitting device performs a first level channel coding on at least one of the at least two transport blocks.

3. The method of claim 2, wherein the method further comprises:

and the sending equipment sends control information, wherein the control information is used for indicating the coding information of the first-level channel coding and the coding information of the second-level channel coding.

4. The method of claim 3, wherein the control information comprises at least one of: downlink control information DCI, sidelink control information SCI, medium access control-control element MAC-CE or radio resource control RRC message.

5. The method of any of claims 1 to 4, further comprising:

the sending equipment generates corresponding first Cyclic Redundancy Check (CRC) bits for at least one of the at least two transport blocks;

and correspondingly adding the first CRC bits after the at least one transmission block by the sending equipment.

6. The method of claim 5, wherein different ones of the at least two transport blocks correspond to different first CRC bits.

7. The method of any of claims 1 to 6, further comprising:

the sending equipment generates a corresponding second CRC bit for the data block after the cascade connection or the interweaving;

the transmitting device adds the second CRC bits after the concatenated or interleaved data block.

8. A method of data transmission, comprising:

receiving equipment receives code blocks to be decoded, which are sent by sending equipment;

the receiving device performs second-level channel decoding on the code block to be decoded to obtain a decoded data block, wherein the decoded data block is obtained by cascading or interleaving at least two transmission blocks;

and the receiving equipment performs de-concatenation or de-interleaving on the decoded data block to obtain a target transmission block of the receiving equipment.

9. The method of claim 8, wherein the receiving device de-concatenates or de-interleaves the decoded data block to obtain a target transport block for the receiving device, comprising:

the receiving device carries out de-concatenation or de-interleaving on the decoded data block to obtain the data block of the receiving device;

and the receiving equipment carries out primary channel decoding on the data block of the receiving equipment to obtain the target transmission block.

10. The method of claim 9, wherein the method further comprises:

and the receiving equipment receives control information sent by the sending equipment, wherein the control information is used for indicating the coding information of the first-level channel coding and the coding information of the second-level channel coding.

11. The method of claim 10, wherein the control information comprises at least one of: downlink control information DCI, sidelink control information SCI, medium access control-control element MAC-CE or radio resource control RRC message.

12. The method of any of claims 8 to 11, further comprising:

and the receiving equipment performs Cyclic Redundancy Check (CRC) check on the decoded data block.

13. The method of any of claims 8 to 12, further comprising:

and the receiving equipment performs CRC check on the target transmission block.

14. A communications apparatus, comprising:

an obtaining module configured to obtain at least two transport blocks;

the multiplexing module is used for cascading or interleaving the at least two transmission blocks to obtain a data block after cascading or interleaving;

a second coding module, configured to perform second-level channel coding on the concatenated or interleaved data block;

and the sending module is used for sending the coded code blocks.

15. The apparatus of claim 14, wherein the apparatus further comprises: the first coding module is further configured to perform a first-level channel coding on at least one of the at least two transport blocks before the data combining module concatenates or interleaves the at least two transport blocks.

16. The apparatus of claim 15, wherein the transmitting module is further configured to transmit control information indicating coding information of the first level channel coding and coding information of the second level channel coding.

17. The apparatus of claim 16, wherein the control information comprises at least one of: downlink control information DCI, sidelink control information SCI, medium access control-control element MAC-CE or radio resource control RRC message.

18. The apparatus of any of claims 14 to 17, further comprising: a first cyclic redundancy check, CRC, adding module, configured to generate corresponding first CRC bits for at least one of the at least two transport blocks; correspondingly adding the first CRC bit to the at least one transport block.

19. The apparatus of claim 18, wherein different ones of the at least two transport blocks correspond to different first CRC bits.

20. The apparatus of any of claims 14 to 19, further comprising: a second CRC adding module, configured to generate a corresponding second CRC bit for the concatenated or interleaved data block after the concatenated or interleaved data block is obtained; adding the second CRC bits after the concatenated or interleaved data block.

21. A communications apparatus, comprising:

the receiving module is used for receiving the code block to be decoded sent by the sending equipment;

the second decoding module is used for carrying out second-level channel decoding on the code block to be decoded to obtain a decoded data block, and the decoded data block is obtained by cascading or interweaving at least two transmission blocks;

and the demultiplexing module is used for performing de-concatenation or de-interleaving on the decoded data block to obtain a target transmission block of the channel decoding device.

22. The apparatus according to claim 21, wherein the demultiplexing module is specifically configured to perform de-concatenation or de-interleaving on the decoded data block to obtain a data block of the receiving device;

the device further comprises: and the first decoding module is used for carrying out first-stage channel decoding on the data block of the receiving equipment to obtain the target transmission block.

23. The apparatus of claim 22, wherein the receiving module is further configured to receive control information sent by the sending device, and the control information is used for indicating coding information of a first level channel coding and coding information of a second level channel coding.

24. The apparatus of claim 23, wherein the control information comprises at least one of: downlink control information DCI, sidelink control information SCI, medium access control-control element MAC-CE or radio resource control RRC message.

25. The apparatus of any of claims 21 to 24, further comprising: and the first Cyclic Redundancy Check (CRC) check module is used for performing CRC check on the decoded data block.

26. The apparatus of any of claims 21 to 24, further comprising: and the second CRC check module is used for carrying out CRC check on the target transmission block.