WO2020238638A1

WO2020238638A1 - Data transmission method and apparatus

Info

Publication number: WO2020238638A1
Application number: PCT/CN2020/090306
Authority: WO
Inventors: 马淑玲; 梁继业; 焦淑蓉; 秦健华
Original assignee: 华为技术有限公司
Priority date: 2019-05-31
Filing date: 2020-05-14
Publication date: 2020-12-03
Also published as: CN112020151A; CN112020151B

Abstract

Embodiments of the present application provide a data transmission method and apparatus. The method comprises: according to a service application scene of an ultra-high reliability and low latency (URLLC) service, a network side device determines a transmission mode corresponding to the service application scene; the network side device transmits the service data of the URLLC service to a terminal side device according to the transmission mode. By means of the method provided by the embodiments of the present application, the transmission mode of the service data of the URLLC service is determined according to the service application scene of the URLLC service, so that the terminal side device can determine the transmission mode of the service data of the URLLC service in real time, and the terminal side device does not need to determine the transmission mode by means of DCI, thereby reducing signaling overhead and improving transmission efficiency.

Description

Data transmission method and device

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910472058.9, and the application name is "a data transmission method and device" on May 31, 2019, the entire content of which is incorporated into this application by reference .

Technical field

This application relates to the field of communication technology, and in particular to a data transmission method and device.

Background technique

The fifth generation (5G) mobile network expects to simultaneously support a variety of scenarios and services through one network. A variety of scenarios include remote driving, smart cities, smart grids, smart factories, etc.; a variety of services include enhanced mobile broadband (eMBB) services, ultra-high reliability and low latency (ultra-high reliability and low). latency (URLLC) business and massive machine-type communication (mMTC) business, etc. Among them, the URLLC business refers to a highly reliable and low-latency connection business. In order to achieve high reliability under low latency requirements, the downlink data of the URLLC service is sent through the physical downlink shared channel (PDSCH). When the network-side device sends the PDSCH, the downlink control information (DCI) sent to the terminal-side device adds repetition count indication information, which is used to indicate the number of repeated PDSCH transmissions. Since the PDSCH can be repeatedly transmitted multiple times, it can meet the requirements of URLLC services for high reliability and low delay. However, this approach increases the overhead of the DCI, and the PDSCH is repeatedly transmitted multiple times. If the terminal device can correctly demodulate the PDSCH during the first transmission of the PDSCH, the resources occupied by the subsequent repeated transmission of the PDSCH will be reduced. Was wasted, thereby reducing the spectrum efficiency of the system. The same problem also exists in the uplink transmission. In the uplink transmission, the terminal-side device also needs to repeatedly transmit data to the network-side device several times according to the instructions of the network-side device.

For this reason, in various application scenarios of URLLC services, efficient data transmission is an urgent problem to be solved.

Summary of the invention

The embodiments of the present application provide a data transmission method and device to solve the problem of how to improve the efficiency of data transmission in the URLLC business scenario.

In a first aspect, an embodiment of the present application provides a data transmission method, the method includes: a terminal-side device determines a first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or The terminal-side device receives first information from the network-side device, the first information is used to indicate the first transmission mode; the terminal-side device receives the data transmitted from the network-side device according to the first transmission mode The service data of the URLLC service.

Through the above method, the transmission mode of the service data of the URLLC service is determined according to the service application scenario of the URLLC service, and the terminal-side device can determine the transmission mode of the service data of the URLLC service in real time, and the terminal-side device does not need to determine the transmission mode through DCI. , Which saves signaling overhead and improves transmission efficiency.

In a possible design, the first transmission mode is one of the following modes:

Manner 1: The first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and the retransmission includes 1 retransmission and the n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 2: The first transmission includes 1 initial transmission, and the retransmission includes 1 retransmission and n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 3: The first transmission includes 1 first transmission and n times of the redundant version transmission of the first transmission, and the retransmission includes 1 retransmission; n is an integer greater than 0.

In a possible design, when the service application scenario of the URLLC service is the first scenario, the corresponding first transmission mode is the first mode, and the data transmitted in the first scenario meets the following conditions: air interface delay Less than or equal to 3ms, the uplink data packet size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Alternatively, when the service application scenario of the URLLC service is the second scenario, the first transmission mode is the second method, and the data transmitted in the second scenario meets the following conditions: the air interface delay is less than or equal to 7 ms, and the uplink data packet The size is less than or equal to 250 bits, and the downlink data packet size is less than or equal to 250 bits;

Or, when the service application scenario of the URLLC service is the third scenario, the first transmission mode is the first mode, and the data transmitted in the third scenario meets the following conditions: the air interface delay is less than or equal to 1ms, and the uplink data packet The size is less than or equal to 32 bits, and the downlink data packet size is less than or equal to 32 bits;

Or, when the service application scenario of the URLLC service is the fourth scenario, the first transmission mode is the first mode, and the data transmitted in the fourth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Or, when the service application scenario of the URLLC service is the fifth scenario, the first transmission mode is the second method, and the data transmitted in the fifth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 10000 bits, and the downstream data packet size is less than or equal to 4096 bits;

Or, when the service application scenario of the URLLC service is the sixth scenario, the first transmission mode is the third method, and the data transmitted in the sixth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 2083 bits, and the downlink data packet size is less than or equal to 5220 bits;

Or, when the service application scenario of the URLLC service is the seventh scenario, the first transmission mode is the second method, and the data transmitted in the seventh scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 1370 bits, and the downlink data packet size is less than or equal to 1370 bits.

Through the above method, by predefining the correspondence between the transmission mode and the service application scenario, it is possible to determine the transmission mode according to the service application scenario and improve the transmission efficiency.

In a possible design, the method further includes: the terminal-side device receives second information from the network-side device, and the second indication is used to indicate the code rate of the channel coding of the service data; The terminal-side device determines the basic graph type of the service data according to the code rate, and determines the redundancy version of the service data during redundancy version transmission according to the code rate and the basic graph type; or, The terminal-side device receives third information from the network-side device, where the third information is used to indicate the redundancy version of the service data during redundancy version transmission.

Through the above method, the redundancy version is determined by the code rate and the type of the basic graph, so there is no need to increase the signaling indicating the redundancy version, thereby saving signaling overhead and improving transmission efficiency.

In a second aspect, an embodiment of the present application provides a data transmission method, including: a network side device determines a first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; the network The side device transmits the service data of the URLLC service to the terminal side device according to the first transmission mode.

Through the above method, the service data transmission mode of the URLLC service is determined according to the service application scenario of the URLLC service, and the network side device does not need to indicate the transmission mode to the terminal side device through DCI, which saves signaling overhead and improves transmission efficiency.

Manner 1: The first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and retransmission includes 1 retransmission and the n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 3: The first transmission includes 1 first transmission and n times of the redundant version transmission of the first transmission, and the retransmission includes 1 retransmission; n is an integer greater than or equal to 0.

Or, when the service application scenario of the URLLC service is the fourth scenario, the first transmission mode is the first mode, and the data transmitted in the fourth scenario meets the following conditions: the air interface delay is less than or equal to 3ms, and the uplink data packet The size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Alternatively, when the service application scenario of the URLLC service is the sixth scenario, the first transmission mode is the third method, and the data transmitted in the sixth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 2083 bits, and the downlink data packet size is less than or equal to 5220 bits;

In a possible design, the method further includes: the network side device determines a block error rate BLER for transmitting the service data of the URLLC service according to the first transmission mode; when the BLER is greater than a first preset When the threshold is reached, the network side device switches to the second transmission mode to transmit the service data of the URLLC service to the terminal side device;

Wherein, in the second transmission mode, the number of transmissions of the redundancy version of the first transmission included in the first transmission is greater than the number of transmissions of the redundancy version of the first transmission included in the first transmission in the first transmission mode, and/or, In the second transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is greater than the number of transmissions of the redundancy version included in the retransmission in the first transmission mode.

In the above method, in the second transmission mode, the number of transmissions of the redundancy version of the initial transmission included in the first transmission and the number of transmissions of the redundancy version of the retransmission included in the retransmission are relatively high, thereby providing higher transmission reliability.

In a possible design, the method further includes: when the bler is less than or equal to a second preset threshold, the network side device switches to a third transmission mode to transmit the URLLC service to the terminal side device Service data; wherein, in the third transmission mode, the number of transmissions of the redundant version of the first transmission included in the first transmission is less than the number of transmissions of the redundant version of the first transmission included in the first transmission in the first transmission mode, and/ Or, in the third transmission mode, the number of transmissions of the redundancy version included in the retransmission in the retransmission is less than the number of transmissions of the redundancy version included in the retransmission in the first transmission mode.

In the above method, in the third transmission mode, the number of transmissions of the redundancy version of the initial transmission included in the first transmission and the number of transmissions of the redundancy version of the retransmission included in the retransmission are fewer, thereby reducing resource overhead and improving resource utilization.

In a possible design, the method further includes: the network side device sends third information to the terminal side device, where the third information is used to indicate the first transmission mode.

In a possible design, the method further includes: the network side device sends second information to the terminal side device, where the second information is used to indicate the code rate of the channel coding of the service data; The code rate is used to determine the redundancy version of the service data when the redundancy version is transmitted;

Alternatively, the network side device sends third information to the terminal side device, where the third information is used to indicate the redundancy version of the service data when the redundancy version is transmitted.

In a third aspect, an embodiment of the present application provides a data transmission method, including: a terminal-side device determines a first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, The terminal-side device receives fourth information from the network-side device, where the fourth information is used to indicate the first transmission mode; the terminal-side device transmits the URLLC service to the network-side device according to the first transmission mode Business data.

Through the above method, the transmission mode of the service data of the URLLC service is determined according to the service application scenario of the URLLC service. The terminal side device can thus determine the transmission mode of the service data of the URLLC service in real time, and the terminal side device does not need to determine the transmission mode through DCI , Which saves signaling overhead and improves transmission efficiency.

In a possible design, after the terminal-side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service, the method further includes: the terminal The side device sends fifth information to the network side device, where the fifth information is used to indicate the first transmission mode.

Alternatively, when the service application scenario of the URLLC service is the fifth scenario, the first transmission mode is the second method, and the data transmitted in the fifth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 10000 bits, and the downstream data packet size is less than or equal to 4096 bits;

Through the above method, by predefining the correspondence between the transmission mode and the service application scenario, the transmission mode can be determined according to the service application scenario, and the transmission efficiency can be improved.

In a fourth aspect, an embodiment of the present application provides a data transmission method, including: a network side device determines a first transmission mode corresponding to the service application scenario according to the business application scenario of the URLLC service; or, the network side device receives data from Fifth information of the terminal-side device, where the fifth information is used to indicate the first transmission mode;

The network side device receives the service data of the URLLC service from the terminal side device according to the first transmission mode.

Through the above method, the service data transmission mode of the URLLC service is determined according to the service application scenario of the URLLC service, and the network side device does not need to indicate the transmission mode to the terminal side device through the DCI, which saves signaling overhead and improves transmission efficiency.

In a possible design, after the network side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service, the method further includes:

The network side device sends fourth information to the terminal side device, where the fourth information is used to indicate the first transmission mode.

In the fifth aspect, this application provides a device. The apparatus has the function of implementing the terminal-side equipment involved in the first aspect or the third aspect. For example, the apparatus includes a module or unit corresponding to the terminal-side equipment executing the steps involved in the first aspect or the third aspect. Means, the functions or units or means can be realized by software, or by hardware, or by hardware executing corresponding software.

In a possible design, the device includes a processing unit and a transceiving unit, and the functions performed by the processing unit and the transceiving unit may correspond to the steps performed by the terminal side device involved in the first or third aspect.

In a possible design, the device includes a processor, and may also include a transceiver. The transceiver is used to send and receive signals, and the processor executes program instructions to accomplish any of the above-mentioned first or third aspects. The method executed by the terminal-side device in the design or implementation of the.

Wherein, the apparatus may further include one or more memories, and the memories are used for coupling with the processor. The one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.

In a possible manner, the memory stores necessary computer program instructions and/or data for realizing the functions of the terminal-side device involved in the first aspect or the third aspect. The processor can execute the computer program instructions stored in the memory to complete the method executed by the terminal-side device in any possible design or implementation of the first aspect or the third aspect.

In a sixth aspect, this application provides a device. The apparatus has the function of implementing the network-side equipment involved in the second aspect or the fourth aspect. For example, the apparatus includes a module or unit corresponding to the network-side equipment executing the steps involved in the second or fourth aspect. Means. The functions or units or means can be implemented by software, or by hardware, or by hardware executing corresponding software.

In a possible design, the device includes a processing unit, a transceiving unit, and the functions performed by the processing unit and transceiving unit can be the same as the network side equipment involved in any possible design or implementation in the second or fourth aspect. The steps performed correspond to those.

In another possible design, the communication device includes a processor, and may also include a transceiver, where the transceiver is used to send and receive signals, and the processor executes program instructions to complete the second aspect or the fourth aspect. The method executed by the network-side device in any possible design or implementation.

In a possible manner, the memory stores necessary computer program instructions and/or data to implement the functions of the network side device involved in any possible design or implementation manner of the second aspect or the fourth aspect. The processor can execute the computer program instructions stored in the memory to complete the method executed by the network side device in any possible design or implementation in the second aspect or the fourth aspect.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-readable instructions. When the computer reads and executes the computer-readable instructions, the computer executes any of the above A possible design approach.

In an eighth aspect, the embodiments of the present application provide a computer program product. When the computer reads and executes the computer program product, the computer executes any of the above-mentioned possible design methods. Optionally, the computer may be the aforementioned network side device or terminal side device.

In a ninth aspect, an embodiment of the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory, so as to implement any of the above-mentioned possible design methods. Optionally, the chip may be a chip in the aforementioned network-side device or a chip in the aforementioned terminal-side device.

In a tenth aspect, embodiments of the present application provide a communication system that includes the terminal-side device in the first aspect and the network-side device in the second aspect, or includes the terminal-side device in the third aspect and the network in the fourth aspect Side equipment.

Description of the drawings

FIG. 1 shows a schematic diagram of a communication system suitable for the communication method of an embodiment of the present application;

2 is a schematic flowchart of a data transmission method provided by an embodiment of the application;

FIG. 3 is a schematic diagram of a redundant version provided by an embodiment of the application;

FIG. 4 is a schematic flowchart of a data transmission method provided by an embodiment of the application;

FIG. 5 is a schematic structural diagram of a data transmission device provided by an embodiment of this application;

6 is a schematic structural diagram of a data transmission device provided by an embodiment of the application;

FIG. 7 is a schematic structural diagram of a data transmission device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of a data transmission device provided by an embodiment of the application.

Detailed ways

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings of the specification.

The embodiments of this application can be applied to various mobile communication systems, such as: new radio (NR) system, long term evolution (LTE) system, advanced long term evolution (LTE-A) System, evolved long term evolution (evolved long term evolution, eLTE) system, future communication system and other communication systems, specifically, there is no restriction here.

To facilitate the understanding of the embodiments of the present application, first, the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application. Fig. 1 shows a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application. As shown in Figure 1, the communication system includes a network side device, and terminal side device 1 to terminal side device 4 connected to the network side device.

For example, the terminal-side device 1 is a transportation device, such as a train. At this time, the network-side device and the terminal-side device 1 can transmit data related to traffic conditions. The terminal-side device 2 is a power device, such as an electric meter. At this time, the network-side device and the terminal-side device 2 can transmit data such as voltage and current of the distribution network, and other situations will not be repeated.

In the embodiment of the present application, the terminal-side device is a device with a wireless transceiver function or a chip that can be installed in the device. In practical applications, the terminal-side devices in the embodiments of the present application may be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminals, augmented reality (augmented) Reality, AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, and wireless terminals in smart grid (smart grid) , Wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiment of this application does not limit the application scenario. In this application, the aforementioned devices with wireless transceiver functions and chips that can be installed in the devices are collectively referred to as terminal-side devices.

In the embodiments of the present application, the network side device may be a wireless access device under various standards, such as an evolved Node B (eNB), a radio network controller (RNC), or a Node B (Node B). B, NB), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), access point (wireless fidelity, WIFI) system, AP), wireless relay node, transmission point (transmission and reception point, TRP or transmission point, TP), etc., can also be gNB or transmission point (TRP or TP) in 5G (NR) system, base station in 5G system One or a group of antenna panels (including multiple antenna panels) of the antenna panel, or, may also be a network node constituting a gNB or a transmission point.

The network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

Refer to FIG. 2, which is a schematic flowchart of a data transmission method provided by an embodiment of this application. The process shown in Figure 2 describes how to determine the transmission mode during downlink transmission. Specifically, the method includes:

Step 201: The network side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service.

Step 202: The network side device transmits the service data of the URLLC service to the terminal side device according to the first transmission mode.

Step 203: The terminal-side device may determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service.

In another possible implementation manner, the terminal-side device may also receive first information from the network-side device, where the first information is used to indicate the first transmission mode. The terminal-side device may determine the first transmission mode according to the first information.

Step 204: The terminal side device receives the service data of the URLLC service transmitted from the network side device according to the first transmission mode.

Through the above method, the service data transmission mode of the URLLC service is determined according to the service application scenario of the URLLC service, so that the transmission mode of the service data can be determined in real time, and the terminal side device can also determine the service data according to the service application scenario of the URLLC service Therefore, there is no need to indicate the transmission mode through DCI, which saves signaling overhead and improves transmission efficiency.

In step 201, the correspondence between the service application scenario and the transmission mode can be pre-appointed. When the network-side device determines to transmit the service data of the URLLC service to the terminal-side device, the network-side device can correspond to the first service application scenario of the URLLC service. The transmission mode is used as the transmission mode used to transmit service data.

It should be noted that the URLLC service is a low-latency, highly-reliable connection service. In the prior art, the reliability and delay requirements corresponding to several service application scenarios of the URLLC service are given. For details, please refer to Table 1.

Table 1

Wherein, the air interface delay may refer to the signal delay between the layer 2 of the network side device and the layer 2 of the terminal side device. Layer 2 can include the medium access control (MAC) layer, the radio link control (RLC) layer, the packet data convergence protocol (PDCP) layer, and the service data application protocol (service). data adaptation protocol, SDAP) layer, etc.

In Table 1, the names of business application scenarios corresponding to different reliability and time delays are just examples, such as remote driving, which can also be called unmanned driving, autonomous driving, etc. For the convenience of description, all are called remote driving in the embodiments of this application. . The embodiment of the present application does not limit the name of the business application scenario. If the reliability, delay, and data packet size requirements of the two business application scenarios are the same, it can be considered that there are essentially two same business application scenarios.

Exemplarily, there may be multiple implementation manners for the correspondence between the pre-appointed service application scenario and the transmission mode, which is not limited in the embodiment of the present application. For example, in conjunction with Table 1, when the service application scenario is distribution network fault management, the first transmission mode corresponding to the service application scenario may be mode one;

When the service application scenario is differential protection, the first transmission mode corresponding to the service application scenario may be mode two;

When the business application scenario is automated control, the first transmission mode corresponding to the business application scenario may be mode one;

When the business application scenario is small data packet data transmission, the first transmission mode corresponding to the business application scenario may be mode one;

When the service application scenario is big data packet data transmission, the first transmission mode corresponding to the service application scenario may be mode two;

When the business application scenario is remote driving, the first transmission mode corresponding to the business application scenario may be mode three;

When the business application scenario is an intelligent transportation system, the first transmission mode corresponding to the business application scenario may be the second mode.

Among them, mode one, the first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and retransmission includes 1 retransmission and n times of the redundancy version transmission of the retransmission; n is greater than 0 Integer.

In the first method, the redundant version is transmitted more frequently, which is suitable for business application scenarios with severe interference and high reliability requirements.

Manner 2: The first transmission includes 1 initial transmission, and the retransmission includes 1 retransmission and n redundant version transmissions of the retransmissions.

In the second method, the initial transmission only needs to be transmitted once, which is suitable for business application scenarios with large data packets and low delay requirements.

Of course, the above are only examples, and there may be other implementations for the correspondence between business application scenarios and transmission modes, which will not be illustrated one by one here. Similarly, there may be other implementation modes for the transmission mode, which will not be illustrated one by one here.

In Mode 1 to Mode 3, in order to improve the reliability of data transmission, a redundant version transmission of initial transmission or retransmission is performed. When the redundancy version is transmitted, the starting position of the transmission data is determined according to the redundancy version (redundancy version, RV). Currently, the service data of the URLLC service is transmitted in units of transport block (TB). After channel coding, one TB includes redundant data. At the same time, in order to improve the reliability of data transmission, a TB may be repeatedly transmitted multiple times, and the data transmitted repeatedly may be the same or different each time. All data of a TB is stored in a ring buffer, and the starting position of reading data is determined from the ring buffer according to the redundant version during each transmission. The ring buffer is a special kind of buffer. In the ring buffer, the start position and the end position of the data are adjacent. The ring buffer can also be called a virtual circular buffer (virtual circular buffer).

For example, as shown in FIG. 3, a schematic diagram of a redundant version provided in an embodiment of this application. The encoded data length of a TB shown in Figure 3 is Ncb. If the TB includes 4 redundant versions, the starting positions are the starting position, 1/4 position, and 2 of the encoded data of the TB. /4 position and 3/4 position, the corresponding redundant versions are 0, 1, 2, and 3 respectively. When the redundancy version is 0 for transmission, the data of the preset length is transmitted from the starting position; correspondingly, when the redundancy version is 1 for transmission, the data of the preset length is transmitted from the 1/4 position. Other situations will not be repeated.

In combination with the above description, in the first to third methods, the redundant version transmission can refer to the hybrid automatic repeat reQuest-less (Hybrid Automatic Repeat reQuest-less, HARQ-less) transmission, or it can refer to the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest-less, HARQ-less) transmission. Repeat reQuest, HARQ) transmission.

If HARQ transmission is used, for the same TB, before each repeated transmission, it is determined whether to transmit according to the acknowledgement (ACK) or non-acknowledgement (Negative Acknowledgement, NACK) of the last transmission fed back by the terminal side device.

If HARQ-less transmission is adopted, for the same TB, before each repeated transmission, it is not necessary to wait for the ACK/NACK feedback from the terminal-side device, but can be directly transmitted. In HARQ-less transmission, for the same TB, the first transmission can be called initial transmission, and repeated transmission can be called retransmission.

In combination with the above description, the first transmission mode may include the first transmission of the redundancy version transmission and the retransmission of the redundancy version transmission. The network side device can indicate to the terminal side device the use of the first transmission redundancy version transmission in various ways. The redundancy version of the redundancy version and the redundancy version of the retransmission.

In a possible implementation manner, the network side device does not directly indicate the redundancy version used in the transmission of the initially transmitted redundancy version and/or the redundancy version used in the transmission of the retransmitted redundancy version. The terminal side device and the network side The device can determine the redundancy version corresponding to the redundancy version transmission in the same way.

In this implementation mode, the code rate of the channel coding of the service data and the correspondence between the base graph (BG) type and the redundancy version used in the service data coding can be pre-appointed, and the network side equipment can be based on the code rate and basic The graph type determines the redundancy version of the service data when the redundancy version is transmitted, that is, determines the redundancy version used in the transmission of the initially transmitted redundancy version and/or the redundancy version used in the transmission of the retransmitted redundancy version. Among them, the basic graph is a predefined Tanner graph. When performing channel coding on service data, a codeword with a preset length and a preset code rate can be constructed by performing expansion operations such as copying and transforming the basic graph.

In this implementation manner, the network-side device may send second information to the terminal-side device, where the second information is used to indicate the code rate of the channel coding of the service data, and is used to indicate the proportion occupied by the useful data after the channel coding. When the terminal-side device receives the second information, it can determine the code rate of the channel coding of the service data. Assuming that the base station wants to send 100 bits of useful data to the terminal side equipment, 10 resource blocks (one resource block includes 12 subcarriers) resources are allocated at the physical layer, and the modulation method is quadrature phase shift keying (QPSK) (that is, one time). The domain symbol transmits 2 bits), after channel coding, the number of bits of the generated data stream is 10*12*2=240bit. And the useful data is 100bit, the code rate of the channel coding is 100/240=0.167. The terminal-side device may determine the basic graph type used when encoding the service data according to the code rate, and determine the redundancy version of the service data during redundancy version transmission according to the code rate and the basic graph type.

It should be noted that in a possible implementation of the prior art, when the code rate of the channel coding of the service data is less than or equal to 0.25, the service data is coded using BG2; when the code rate of the channel coding of the service data is greater than At 0.25, use BG1 to encode service data. Therefore, the terminal-side device can combine the above implementation methods to determine the basic image type according to the bit rate. For example, when the terminal-side device determines that the code rate is 0.5 according to the second information, it can determine that the basic graph type is BG1. Of course, the above is only an example. How the terminal-side device determines the basic graph type according to the code rate is not limited in the embodiment of the present application, and will not be described one by one.

In combination with the above description, the following examples describe the corresponding relationship between the code rate and the type of the basic graph and the redundancy version in different scenarios. For example, the value of n in mode one is 3. Scenario 1: When the service data is coded, the basic picture type used is BG1, and the code rate of the channel coding of the service data is less than or equal to 0.75, or the basic picture type used when the service data is coded is BG2 and the code of the channel coding of the service data When the rate is less than or equal to 0.25, the redundancy versions of the redundant version transmissions of the 3 first transmissions are 2, 3, and 1, respectively; the redundancy versions of the redundant version transmissions of the 3 retransmissions are 2, 3, and 1, respectively.

Scenario 2: When the service data is coded, the basic picture type used is BG1, and the code rate of the channel coding of the service data is greater than 0.75, or the basic picture type used when the service data is coded is BG2 and the code rate of the service data channel coding is greater than At 0.25, the redundancy versions of the 3 first transmissions of the redundancy version are 2, 3, and 1, respectively; the 3 retransmissions of the redundancy version are 3, 1, and 0, respectively. At this time, in mode 1, the redundancy version of the service data when the redundancy version is transmitted may be as shown in Table 2.

Table 2-Way One

It should be noted that, in Table 2, the redundancy version of the initial transmission and the redundancy version of the retransmission can be predefined by the protocol, and the network side device can indicate to the terminal side device the redundancy version of the initial transmission and the retransmission version through DCI. Redundant version.

In Table 2, after the first retransmission, there may be a second retransmission, a third retransmission, etc. The redundant version of each retransmission and the redundant version of the retransmission can refer to the first retransmission. Transmission and the 3 redundant version transmissions of the first retransmission are not repeated here.

For another example, the value of n in the second method is 3. Scenario 1: When the service data is coded, the basic picture type used is BG1, and the code rate of the channel coding of the service data is less than or equal to 0.75, or the basic picture type used when the service data is coded is BG2 and the code of the channel coding of the service data When the rate is less than or equal to 0.25, the redundancy versions transmitted by the redundancy version of the 3 retransmissions are 2, 3, and 1, respectively.

Scenario 2: When the service data is coded, the basic picture type used is BG1, and the code rate of the channel coding of the service data is greater than 0.75, or the basic picture type used when the service data is coded is BG2 and the code rate of the service data channel coding is greater than At 0.25, the redundant versions of the 3 retransmitted redundant versions are 3, 1, and 0 respectively. At this time, in the second mode, the redundancy version of the service data when the redundancy version is transmitted may be as shown in Table 3.

Table 3-Way Two

In Table 3, after the first retransmission, there may be a second retransmission, a third retransmission, etc. The redundant version of each retransmission and the redundant version transmission of the retransmission can refer to the first retransmission. Transmission and the 3 redundant version transmissions of the first retransmission are not repeated here.

In Table 3, the redundancy version of the initial transmission and the redundancy version of the retransmission may be predefined by the protocol, and the network side device may indicate the initial transmission redundancy version and the retransmission redundancy version to the terminal side device through DCI.

For another example, the value of n in mode three is 3. Scenario 1: When the service data is coded, the basic picture type used is BG1, and the code rate of the channel coding of the service data is less than or equal to 0.75, or the basic picture type used when the service data is coded is BG2 and the code of the channel coding of the service data When the rate is less than or equal to 0.25, the redundancy versions of the 3 first transmissions are 2, 3, and 1, respectively.

Scenario 2: When the service data is coded, the basic picture type used is BG1, and the code rate of the channel coding of the service data is greater than 0.75, or the basic picture type used when the service data is coded is BG2 and the code rate of the service data channel coding is greater than At 0.25, the redundant versions of the 3 first transmissions were 2, 3, and 0 respectively. At this time, in the second mode, the redundancy version of the service data when the redundancy version is transmitted may be as shown in Table 4.

Table 4-Way Three

In Table 4, the redundancy version of the initial transmission and the redundancy version of the retransmission may be predefined by the protocol, and the network side device may indicate the initial transmission redundancy version and the retransmission redundancy version to the terminal side device through DCI.

In Table 4, the redundancy version of each retransmission, such as the second retransmission and the third retransmission, can be referred to the redundancy version of the first retransmission, which will not be repeated here.

In another implementation manner, the network-side device may send third information to the terminal-side device, and the third information is used to indicate the redundancy version of the service data when the redundancy version is transmitted.

In this implementation manner, the terminal-side device can determine the redundancy version of the service data during redundancy version transmission according to the third information. Among them, the third information can be sent through DCI.

It should be noted that the redundancy version indicated by the network side device through the third information may be the redundancy version specified by the protocol, or may be the redundancy version determined according to the code rate and the type of the basic graph. This embodiment of the application does not Not limited.

In the embodiment of the present application, the network side device may also determine whether to switch the transmission mode according to the block error rate (BLER) of the service data of the URLLC service in the first transmission mode.

In the first possible scenario, when the BLER is greater than the first preset threshold, it indicates that the reliability of the current first transmission mode is low, and the network side device can switch to the second transmission mode to transmit data to the terminal side device. Describe the business data of the URLLC business. Correspondingly, the network side device no longer uses the first transmission mode to transmit service data.

In the embodiment of the present application, in the second transmission mode, the number of transmissions of the redundancy version included in the first transmission in the first transmission is greater than the number of transmissions of the redundancy version included in the first transmission in the first transmission mode.

Alternatively, in the second transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is greater than the number of transmissions of the redundancy version included in the retransmission in the first transmission mode.

Or, in the second transmission mode, the number of transmissions of the redundancy version of the first transmission included in the first transmission is greater than the number of transmissions of the redundancy version of the first transmission included in the first transmission, and the retransmissions included in the retransmission The number of redundant version transmissions is greater than the number of redundant version transmissions included in the retransmission in the first transmission mode.

For example, the first transmission mode is mode two, and the second transmission mode after switching is mode one.

In the above method, in the second transmission mode, the number of transmissions of the redundancy version of the initial transmission included in the first transmission and the number of transmissions of the redundancy version of the retransmission included in the retransmission are higher, so that higher transmission reliability can be provided.

In the second possible scenario, when the BLER is less than or equal to the second preset threshold, the network side device switches to the third transmission mode to transmit the service data of the URLLC service to the terminal side device; wherein, the second preset The threshold is less than the first preset threshold. When the BLER is low, it indicates that the current transmission reliability is high, which can reduce the number of redundant version transmissions and reduce resource overhead.

Wherein, in the third transmission mode, the number of initial transmissions of the redundancy version included in the first transmission is less than the number of initial transmissions of the redundancy version included in the first transmission mode.

Alternatively, in the third transmission mode, the number of times of redundancy version transmissions of the retransmission included in the retransmission is less than the number of times of redundancy version transmissions included in the retransmission of the retransmission in the first transmission mode.

Alternatively, in the third transmission mode, the number of transmissions of the redundancy version of the first transmission included in the first transmission is less than the number of transmissions of the redundancy version of the first transmission included in the first transmission in the first transmission mode, and the retransmission included in the retransmission The number of redundant version transmissions is less than the number of redundant version transmissions included in the retransmission in the first transmission mode.

For example, the first transmission mode is mode one, and the third transmission mode after switching is mode two or mode three.

In the third possible scenario, when the BLER is greater than the second preset threshold and less than or equal to the first preset threshold, the network side device may continue to use the first transmission mode to transmit the URLLC service to the terminal side device. Business data.

The embodiments of the present application can also be applied to the uplink transmission of the URLLC service. In the uplink transmission scenario, the terminal-side device and the network-side device can respectively determine the first transmission corresponding to the service application scenario according to the service application scenario of the URLLC service. In this case, the terminal-side device does not need to indicate the first transmission mode to the network-side device, thereby reducing signaling overhead.

Specifically, refer to FIG. 4, which is a schematic flowchart of a data transmission method provided by an embodiment of this application. The method includes:

Step 401: The terminal-side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service;

Step 402: The terminal-side device transmits the service data of the URLLC service to the network-side device according to the first transmission mode.

Step 403: The network side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service.

Step 404: The network side device receives the service data of the URLLC service from the terminal side device according to the first transmission mode.

In the above procedure, after determining the first transmission mode, the terminal-side device may also send fourth information to the network-side device, where the fourth information is used to indicate the first transmission mode. At this time, in step 403, the network-side device does not need to determine the first transmission mode according to the service application scenario of the URLLC service, but directly determines the first transmission mode according to the fourth information.

Correspondingly, after determining the first transmission mode, the network side device may also send fifth information to the terminal side device, where the fifth information is used to indicate the first transmission mode. At this time, in step 401, the terminal-side device does not need to determine the first transmission mode according to the service application scenario of the URLLC service, but directly determines the first transmission mode according to the fifth information.

Regarding the correspondence between the service application scenario and the first transmission mode, the service application scenario, and the specific content of the first transmission mode, reference may be made to the foregoing description, which will not be repeated here.

As shown in FIG. 5, a schematic structural diagram of a data transmission device provided in an embodiment of this application. The apparatus can be used to perform the actions of the terminal-side equipment in the foregoing method embodiments. The apparatus 500 includes a processing unit 501 and a transceiver unit 502.

When the data transmission apparatus 500 executes the actions of the terminal-side equipment in the flow shown in FIG. 2:

The processing unit 501 is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, the terminal side device receives the first information from the network side device, The first information is used to indicate the first transmission mode;

The transceiver unit 502 is configured to receive the service data of the URLLC service transmitted from the network side device according to the first transmission mode.

In a possible design, the transceiver unit 502 is also used to:

Receiving second information from the network side device, where the second indication is used to indicate the code rate of the channel coding of the service data;

The processing unit 501 is further configured to determine the basic graph type of the service data according to the code rate, and determine the redundancy of the service data during the redundancy version transmission according to the code rate and the basic graph type. version;

Alternatively, the transceiving unit 502 is further configured to receive third information from the network side device, where the third information is used to indicate the redundancy version of the service data when the redundancy version is transmitted.

When the data transmission apparatus 500 executes the actions of the terminal-side equipment in the process shown in FIG. 4:

The processing unit 501 is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, the terminal side device receives the fourth information from the network side device, The fourth information is used to indicate the first transmission mode;

The transceiver unit 502 is configured to transmit the service data of the URLLC service to the network side device according to the first transmission mode.

In a possible design, after the first transmission mode corresponding to the service application scenario is determined according to the service application scenario of the ultra-high-reliability and low-latency URLLC service, the transceiver unit 502 is further configured to:

Send fifth information to the network side device, where the fifth information is used to indicate the first transmission mode.

Fig. 6 is a schematic structural diagram of a device provided by an embodiment of the present application. The device shown in FIG. 6 may be a hardware circuit implementation of the device shown in FIG. 5. The communication device can be applied to the flowchart shown in FIG. 2 or FIG. 4 to perform the function of the terminal-side device in the foregoing method embodiment. For ease of description, FIG. 6 only shows the main components of the communication device. Optionally, the communication device may be a terminal-side device, or a device in a terminal-side device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may also include other circuit structures and / Or discrete devices. Optionally, taking the communication device as a terminal-side device as an example, as shown in FIG. 6, the device 600 includes a processor 601, a memory 602, a transceiver 603, an antenna 604, and an input and output device 605. The processor 601 is mainly used to process communication protocols and communication data, and to control the entire wireless communication device, execute software programs, and process data of the software programs, for example, to support the wireless communication device to execute the methods described in the above method embodiments. Action etc. The memory 602 is mainly used to store software programs and data. The transceiver 603 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna 604 is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input output device 605, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input by the user and output data to the user.

For the functions of the device 600 shown in FIG. 6, reference may be made to the description in the process shown in FIG. 2 or FIG.

As shown in FIG. 7, a schematic structural diagram of a data transmission device provided in an embodiment of this application. The device can be used to perform actions of the network side device in the foregoing method embodiments. The device 700 includes a processing unit 701 and a transceiver unit 702.

When the data transmission apparatus 700 executes the actions of the network side equipment in the process shown in FIG. 2:

The processing unit 701 is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service;

The transceiver unit 702 is configured to transmit the service data of the URLLC service to the terminal side device according to the first transmission mode.

In a possible design, the transceiver unit 701 is also used to:

Determining a block error rate BLER for transmitting the service data of the URLLC service according to the first transmission mode;

When the BLER is greater than the first preset threshold, the network side device switches to the second transmission mode to transmit the service data of the URLLC service to the terminal side device;

In a possible design, the transceiver unit 702 is also used to:

When the bler is less than or equal to the second preset threshold, switch to the third transmission mode to transmit the service data of the URLLC service to the terminal side device;

Wherein, in the third transmission mode, the number of transmissions of the redundancy version included in the first transmission in the first transmission is less than the number of transmissions of the redundancy version included in the first transmission in the first transmission mode, and/or, In the third transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is less than the number of transmissions of the redundancy version of the retransmission included in the first transmission mode.

In a possible design, the transceiver unit 702 is also used to:

Sending third information to the terminal-side device, where the third information is used to indicate the first transmission mode.

In a possible design, the transceiver unit 701 is also used to:

Send second information to the terminal-side device, where the second information is used to indicate the code rate of the channel coding of the service data; the code rate is used to determine the redundancy of the service data in the transmission of the redundancy version version;

Or, sending third information to the terminal-side device, where the third information is used to indicate the redundancy version of the service data during redundancy version transmission.

When the data transmission apparatus 700 executes the actions of the network side equipment in the process shown in FIG. 4:

The processing unit 701 is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service; or, the network side device receives fifth information from the terminal side device, and the fifth information uses To indicate the first transmission mode;

The transceiver unit 702 is configured to receive service data of the URLLC service from the terminal side device according to the first transmission mode.

In a possible design, after the first transmission mode corresponding to the service application scenario is determined according to the service application scenario of the URLLC service, the transceiver unit 702 is further configured to:

Sending fourth information to the terminal-side device, where the fourth information is used to indicate the first transmission mode.

Fig. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device shown in FIG. 8 may be a hardware circuit implementation of the communication device shown in FIG. 7. The communication device can be applied to the flowchart shown in FIG. 2 or 4 to perform the function of the network side device in the above method embodiment. For ease of description, FIG. 8 only shows the main components of the communication device. Optionally, the communication device may be a network-side device, or a device in a network-side device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may also include other circuit structures and / Or discrete devices. Optionally, taking the communication device as a network-side device as an example, as shown in FIG. 8, the communication device 800 includes a processor 801, a memory 802, a transceiver 803, an antenna 804, and the like.

For the functions of the communication device 800 shown in FIG. 8, reference may be made to the description in the process shown in FIG. 2 or FIG. 4, and details are not described herein again.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A data transmission method, characterized by comprising:

The terminal-side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, the terminal-side device receives the first information from the network-side device, and the second A piece of information used to indicate the first transmission mode;

The terminal side device receives the service data of the URLLC service transmitted from the network side device according to the first transmission mode.
The method according to claim 1, wherein the first transmission mode is one of the following modes:

Manner 1: The first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and retransmission includes 1 retransmission and the n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 2: The first transmission includes 1 initial transmission, and the retransmission includes 1 retransmission and n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 3: The first transmission includes 1 first transmission and n times of the redundant version transmission of the first transmission, and the retransmission includes 1 retransmission; n is an integer greater than 0.
The method according to claim 2, wherein when the service application scenario of the URLLC service is the first scenario, the corresponding first transmission mode is the first mode, and the data transmitted in the first scenario meets the following requirements: Conditions: air interface delay is less than or equal to 3ms, uplink data packet size is less than or equal to 100 bits, and downlink data packet size is less than or equal to 100 bits;

Alternatively, when the service application scenario of the URLLC service is the second scenario, the first transmission mode is the second method, and the data transmitted in the second scenario meets the following conditions: the air interface delay is less than or equal to 7 ms, and the uplink data packet The size is less than or equal to 250 bits, and the downlink data packet size is less than or equal to 250 bits;

Or, when the service application scenario of the URLLC service is the third scenario, the first transmission mode is the first mode, and the data transmitted in the third scenario meets the following conditions: the air interface delay is less than or equal to 1ms, and the uplink data packet The size is less than or equal to 32 bits, and the downlink data packet size is less than or equal to 32 bits;

Or, when the service application scenario of the URLLC service is the fourth scenario, the first transmission mode is the first mode, and the data transmitted in the fourth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Or, when the service application scenario of the URLLC service is the fifth scenario, the first transmission mode is the second method, and the data transmitted in the fifth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 10000 bits, and the downstream data packet size is less than or equal to 4096 bits;

Or, when the service application scenario of the URLLC service is the sixth scenario, the first transmission mode is the third method, and the data transmitted in the sixth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 2083 bits, and the downlink data packet size is less than or equal to 5220 bits;

Or, when the service application scenario of the URLLC service is the seventh scenario, the first transmission mode is the second method, and the data transmitted in the seventh scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 1370 bits, and the downlink data packet size is less than or equal to 1370 bits.
The method according to any one of claims 1 to 3, wherein the method further comprises:

The terminal-side device receives second information from the network-side device, where the second indication is used to indicate the code rate of the channel coding of the service data;

Determining, by the terminal-side device, the basic graph type of the service data according to the code rate, and determining the redundancy version of the service data during redundancy version transmission according to the code rate and the basic graph type;

Alternatively, the terminal-side device receives third information from the network-side device, where the third information is used to indicate the redundancy version of the service data during redundancy version transmission.
A data transmission method, characterized by comprising:

The network side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service;

The network side device transmits the service data of the URLLC service to the terminal side device according to the first transmission mode.
The method according to claim 5, wherein the first transmission mode is one of the following modes:

Manner 1: The first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and retransmission includes 1 retransmission and the n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 2: The first transmission includes 1 initial transmission, and the retransmission includes 1 retransmission and n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 3: The first transmission includes 1 first transmission and n times of the redundant version transmission of the first transmission, and the retransmission includes 1 retransmission; n is an integer greater than or equal to 0.
The method according to claim 6, wherein when the service application scenario of the URLLC service is the first scenario, the corresponding first transmission mode is the first mode, and the data transmitted in the first scenario meets the following Conditions: air interface delay is less than or equal to 3ms, uplink data packet size is less than or equal to 100 bits, and downlink data packet size is less than or equal to 100 bits;

Alternatively, when the service application scenario of the URLLC service is the second scenario, the first transmission mode is the second method, and the data transmitted in the second scenario meets the following conditions: the air interface delay is less than or equal to 7 ms, and the uplink data packet The size is less than or equal to 250 bits, and the downlink data packet size is less than or equal to 250 bits;

Or, when the service application scenario of the URLLC service is the third scenario, the first transmission mode is the first mode, and the data transmitted in the third scenario meets the following conditions: the air interface delay is less than or equal to 1ms, and the uplink data packet The size is less than or equal to 32 bits, and the downlink data packet size is less than or equal to 32 bits;

Or, when the service application scenario of the URLLC service is the fourth scenario, the first transmission mode is the first mode, and the data transmitted in the fourth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Or, when the service application scenario of the URLLC service is the fifth scenario, the first transmission mode is the second method, and the data transmitted in the fifth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 10000 bits, and the downstream data packet size is less than or equal to 4096 bits;

Or, when the service application scenario of the URLLC service is the sixth scenario, the first transmission mode is the third method, and the data transmitted in the sixth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 2083 bits, and the downlink data packet size is less than or equal to 5220 bits;

Or, when the service application scenario of the URLLC service is the seventh scenario, the first transmission mode is the second method, and the data transmitted in the seventh scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 1370 bits, and the downlink data packet size is less than or equal to 1370 bits.
The method according to any one of claims 5 to 7, wherein the method further comprises:

Determining, by the network side device, a block error rate BLER for transmitting service data of the URLLC service according to the first transmission mode;

When the BLER is greater than the first preset threshold, the network side device switches to the second transmission mode to transmit the service data of the URLLC service to the terminal side device;

Wherein, in the second transmission mode, the number of transmissions of the redundancy version of the first transmission included in the first transmission is greater than the number of transmissions of the redundancy version of the first transmission included in the first transmission in the first transmission mode, and/or, In the second transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is greater than the number of transmissions of the redundancy version included in the retransmission in the first transmission mode.
The method according to claim 8, wherein the method further comprises:

When the bler is less than or equal to the second preset threshold, the network side device switches to the third transmission mode to transmit the service data of the URLLC service to the terminal side device;

Wherein, in the third transmission mode, the number of transmissions of the redundancy version included in the first transmission in the first transmission is less than the number of transmissions of the redundancy version included in the first transmission in the first transmission mode, and/or, In the third transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is less than the number of transmissions of the redundancy version of the retransmission included in the first transmission mode.
The method according to any one of claims 5 to 9, wherein the method further comprises:

The network side device sends third information to the terminal side device, where the third information is used to indicate the first transmission mode.
The method according to any one of claims 5 to 10, wherein the method further comprises:

The network-side device sends second information to the terminal-side device, where the second information is used to indicate the code rate of the channel coding of the service data; the code rate is used to determine that the service data is in a redundant version Redundant version during transmission;

Alternatively, the network side device sends third information to the terminal side device, where the third information is used to indicate the redundancy version of the service data during redundancy version transmission.
A data transmission method, characterized by comprising:

The terminal-side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, the terminal-side device receives fourth information from the network-side device, and the first transmission mode Four information is used to indicate the first transmission mode;

The terminal side device transmits the service data of the URLLC service to the network side device according to the first transmission mode.
The method according to claim 12, wherein after the terminal-side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service, the method further include:

The terminal-side device sends fifth information to the network-side device, where the fifth information is used to indicate the first transmission mode.
A data transmission method, characterized by comprising:

The network side device determines the first transmission mode corresponding to the service application scenario according to the business application scenario of the URLLC service; or, the network side device receives fifth information from the terminal side device, and the fifth information is used to indicate The first transmission mode;

The network side device receives the service data of the URLLC service from the terminal side device according to the first transmission mode.
The method according to claim 14, wherein after the network side device determines the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service, the method further comprises:

The network side device sends fourth information to the terminal side device, where the fourth information is used to indicate the first transmission mode.
A data transmission device is characterized in that it comprises:

The processing unit is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, the terminal side device receives the first information from the network side device, so The first information is used to indicate the first transmission mode;

The transceiver unit is configured to receive the service data of the URLLC service transmitted from the network side device according to the first transmission mode.
The apparatus according to claim 16, wherein the first transmission mode is one of the following modes:

Manner 1: The first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and retransmission includes 1 retransmission and the n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 2: The first transmission includes 1 initial transmission, and the retransmission includes 1 retransmission and n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 3: The first transmission includes 1 first transmission and n times of the redundant version transmission of the first transmission, and the retransmission includes 1 retransmission; n is an integer greater than 0.
The apparatus according to claim 17, wherein when the service application scenario of the URLLC service is the first scenario, the corresponding first transmission mode is the first mode, and the data transmitted in the first scenario meets the following Conditions: air interface delay is less than or equal to 3ms, uplink data packet size is less than or equal to 100 bits, and downlink data packet size is less than or equal to 100 bits;

Alternatively, when the service application scenario of the URLLC service is the second scenario, the first transmission mode is the second method, and the data transmitted in the second scenario meets the following conditions: the air interface delay is less than or equal to 7 ms, and the uplink data packet The size is less than or equal to 250 bits, and the downlink data packet size is less than or equal to 250 bits;

Or, when the service application scenario of the URLLC service is the third scenario, the first transmission mode is the first mode, and the data transmitted in the third scenario meets the following conditions: the air interface delay is less than or equal to 1ms, and the uplink data packet The size is less than or equal to 32 bits, and the downlink data packet size is less than or equal to 32 bits;

Or, when the service application scenario of the URLLC service is the fourth scenario, the first transmission mode is the first mode, and the data transmitted in the fourth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Or, when the service application scenario of the URLLC service is the fifth scenario, the first transmission mode is the second method, and the data transmitted in the fifth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 10000 bits, and the downstream data packet size is less than or equal to 4096 bits;

Or, when the service application scenario of the URLLC service is the sixth scenario, the first transmission mode is the third method, and the data transmitted in the sixth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 2083 bits, and the downlink data packet size is less than or equal to 5220 bits;

Or, when the service application scenario of the URLLC service is the seventh scenario, the first transmission mode is the second method, and the data transmitted in the seventh scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 1370 bits, and the downlink data packet size is less than or equal to 1370 bits.
The device according to any one of claims 16 to 18, wherein the transceiver unit is further configured to:

Receiving second information from the network side device, where the second indication is used to indicate the code rate of the channel coding of the service data;

The processing unit is further configured to determine the basic graph type of the service data according to the code rate, and determine the redundancy version of the service data during redundancy version transmission according to the code rate and the basic graph type ；

Alternatively, the transceiving unit is further configured to receive third information from the network side device, where the third information is used to indicate the redundancy version of the service data when the redundancy version is transmitted.
A data transmission device is characterized in that it comprises:

A processing unit, configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high reliability and low-latency URLLC service;

The transceiver unit is configured to transmit the service data of the URLLC service to the terminal side device according to the first transmission mode.
The apparatus according to claim 20, wherein the first transmission mode is one of the following modes:

Manner 1: The first transmission includes 1 first transmission and n times of the redundancy version transmission of the first transmission, and retransmission includes 1 retransmission and the n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 2: The first transmission includes 1 initial transmission, and the retransmission includes 1 retransmission and n times of the redundancy version transmission of the retransmission; n is an integer greater than 0;

Manner 3: The first transmission includes 1 first transmission and n times of the redundant version transmission of the first transmission, and the retransmission includes 1 retransmission; n is an integer greater than or equal to 0.
The apparatus according to claim 21, wherein when the service application scenario of the URLLC service is the first scenario, the corresponding first transmission mode is the first mode, and the data transmitted in the first scenario meets the following Conditions: air interface delay is less than or equal to 3ms, uplink data packet size is less than or equal to 100 bits, and downlink data packet size is less than or equal to 100 bits;

Alternatively, when the service application scenario of the URLLC service is the second scenario, the first transmission mode is the second method, and the data transmitted in the second scenario meets the following conditions: the air interface delay is less than or equal to 7 ms, and the uplink data packet The size is less than or equal to 250 bits, and the downlink data packet size is less than or equal to 250 bits;

Or, when the service application scenario of the URLLC service is the third scenario, the first transmission mode is the first mode, and the data transmitted in the third scenario meets the following conditions: the air interface delay is less than or equal to 1ms, and the uplink data packet The size is less than or equal to 32 bits, and the downlink data packet size is less than or equal to 32 bits;

Or, when the service application scenario of the URLLC service is the fourth scenario, the first transmission mode is the first mode, and the data transmitted in the fourth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 100 bits, and the downlink data packet size is less than or equal to 100 bits;

Or, when the service application scenario of the URLLC service is the fifth scenario, the first transmission mode is the second method, and the data transmitted in the fifth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 10000 bits, and the downstream data packet size is less than or equal to 4096 bits;

Or, when the service application scenario of the URLLC service is the sixth scenario, the first transmission mode is the third method, and the data transmitted in the sixth scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 2083 bits, and the downlink data packet size is less than or equal to 5220 bits;

Or, when the service application scenario of the URLLC service is the seventh scenario, the first transmission mode is the second method, and the data transmitted in the seventh scenario meets the following conditions: the air interface delay is less than or equal to 3 ms, and the uplink data packet The size is less than or equal to 1370 bits, and the downlink data packet size is less than or equal to 1370 bits.
The device according to any one of claims 20 to 22, wherein the transceiver unit is further configured to:

Determining a block error rate BLER for transmitting the service data of the URLLC service according to the first transmission mode;

When the BLER is greater than the first preset threshold, the network side device switches to the second transmission mode to transmit the service data of the URLLC service to the terminal side device;

Wherein, in the second transmission mode, the number of transmissions of the redundancy version of the first transmission included in the first transmission is greater than the number of transmissions of the redundancy version of the first transmission included in the first transmission in the first transmission mode, and/or, In the second transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is greater than the number of transmissions of the redundancy version included in the retransmission in the first transmission mode.
The device according to claim 23, wherein the transceiver unit is further configured to:

When the bler is less than or equal to the second preset threshold, switch to the third transmission mode to transmit the service data of the URLLC service to the terminal side device;

Wherein, in the third transmission mode, the number of transmissions of the redundancy version included in the first transmission in the first transmission is less than the number of transmissions of the redundancy version included in the first transmission in the first transmission mode, and/or, In the third transmission mode, the number of transmissions of the redundancy version of the retransmission included in the retransmission is less than the number of transmissions of the redundancy version of the retransmission included in the first transmission mode.
The device according to any one of claims 20 to 24, wherein the transceiver unit is further configured to:

Sending third information to the terminal-side device, where the third information is used to indicate the first transmission mode.
The device according to any one of claims 20 to 25, wherein the transceiver unit is further configured to:

Send second information to the terminal-side device, where the second information is used to indicate the code rate of the channel coding of the service data; the code rate is used to determine the redundancy of the service data in the transmission of the redundancy version version;

Or, sending third information to the terminal-side device, where the third information is used to indicate the redundancy version of the service data during redundancy version transmission.
A data transmission device is characterized in that it comprises:

The processing unit is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the ultra-high-reliability and low-latency URLLC service; or, the terminal-side device receives the fourth information from the network-side device, so The fourth information is used to indicate the first transmission mode;

The transceiver unit is configured to transmit the service data of the URLLC service to the network side device according to the first transmission mode.
The apparatus according to claim 27, wherein after the first transmission mode corresponding to the service application scenario is determined according to the service application scenario of the ultra-high-reliability and low-latency URLLC service, the transceiver unit is further configured to :

Send fifth information to the network side device, where the fifth information is used to indicate the first transmission mode.
A data transmission device is characterized in that it comprises:

The processing unit is configured to determine the first transmission mode corresponding to the service application scenario according to the service application scenario of the URLLC service; or, the network side device receives fifth information from the terminal side device, where the fifth information is used for Indicating the first transmission mode;

The transceiver unit is configured to receive service data of the URLLC service from the terminal side device according to the first transmission mode.
The apparatus according to claim 29, wherein after the first transmission mode corresponding to the service application scenario is determined according to the service application scenario of the URLLC service, the transceiver unit is further configured to:

Sending fourth information to the terminal-side device, where the fourth information is used to indicate the first transmission mode.
A data transmission device, wherein the data transmission device includes a processor and a memory, the processor is used to execute instructions stored on the memory, and when the instructions are executed, the data transmission device Perform the method according to any one of claims 1 to 15.
A computer-readable storage medium, characterized by comprising instructions, which when executed, implement the method according to any one of claims 1 to 15.
A computer program product, which is characterized in that when it runs on a computer, the computer executes the method according to any one of claims 1 to 15.