WO2021102938A1

WO2021102938A1 - Downlink transmission method and communication apparatus

Info

Publication number: WO2021102938A1
Application number: PCT/CN2019/122052
Authority: WO
Inventors: 张鹏; 戴明增; 王君; 许华
Original assignee: 华为技术有限公司
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2021-06-03
Also published as: CN114762366A; CN114762366B

Abstract

The present application provides a downlink transmission method and a communication apparatus, which can solve the problem that a data packet received by a terminal is inconsistent with a forwarded data packet, and can be applied to the fields of Internet of Things, automatic driving systems, 4G systems, 5G systems, and future communication systems such as 6G systems. The method comprises: after receiving a first data channel carrying first data from a network device, a first terminal sends to a second terminal a second data channel carrying first data, the first data carried in the second data channel and the first data carried in the first data channel are consistent in data content. Then, the second terminal performs a decoding operation on the received second data channel to obtain the first data.

Description

Downlink transmission method and communication device

Technical field

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

Background technique

Wireless communication technology has experienced rapid development in the past few decades. It has successively experienced the first generation of wireless communication systems based on analog communication systems, and the 2G wireless communication system represented by the global system for mobile communication (GSM) , The 3G wireless communication system represented by wideband code division multiple access (WCDMA) has been widely commercialized all over the world and has achieved great success in the long term evolution (LTE) and other 4G wireless communication systems. Communication Systems. The business supported by the wireless communication system has evolved from the initial voice and short message to now support wireless high-speed data communication. At the same time, the number of wireless connections around the world is experiencing continuous rapid growth, and various new wireless service types are also emerging in large numbers, such as the Internet of Things, autonomous driving, etc., all of which contribute to the next generation of wireless communication systems, namely 5G The system puts forward higher requirements.

User collaboration is one of the main features supported by the next-generation communication system. User collaboration refers to a terminal communicating with network equipment under the assistance of other terminals. Take the following coordinated transmission as an example. As shown in FIG. 1, the first terminal is a cooperation user equipment (CUE), and the second terminal is a target user equipment (TUE). CUE demodulates and decodes the data packet 1 received from the network equipment, and splits and/or merges the successfully decoded data packet 1 with other data packets, such as the data packet 2 that the CUE itself needs to send to the TUE. , Generate a new data packet, then modulate and encode the new data packet and send it to TUE. That is to say, the new data packet generated after the above split and/or merge operation does not have data consistency with data packet 1, resulting in the failure of TUE to jointly decode data packet 1, for example, it cannot be combined with another cooperating terminal for forwarding Data packet 1, and/or, the data packet 1 sent by the network device to the TUE is jointly decoded, resulting in a low TUE decoding success rate.

Summary of the invention

The embodiments of the present application provide a downlink transmission method and a communication device, which can solve the problem of inconsistency between a new data packet generated by a terminal and a received data packet, thereby improving decoding performance.

In order to achieve the above objectives, this application adopts the following technical solutions:

In the first aspect, a downlink transmission method is provided. The downlink transmission method includes: a network device sends a first data channel to a first terminal, and sends a first message to the first terminal. The first data channel carries the first data, the first message instructs the first terminal to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content Consistency.

In a possible design method, the downlink transmission method described in the first aspect may further include: the network device sends the first control channel to the first terminal. The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content. That is, the network device may explicitly instruct the first terminal not to split and/or merge the first data, so as to maintain the data of the first data carried by the second data channel and the first data carried by the first data channel. Consistency of content.

In another possible design method, the foregoing network device sending the first data channel to the first terminal may include: the network device sends the first data channel to the first terminal on the first downlink resource, and the first downlink resource Resources are pre-configured resources or resources configured by network equipment through RRC signaling. RRC signaling is also called high-level signaling, semi-static signaling, etc. In other words, the network device can also implicitly instruct the first terminal not to split and/or merge the first data. For example, it can transmit the first data on a designated downlink resource to maintain the data carried by the second data channel. Consistency between the first data and the data content of the first data carried by the first data channel.

In the second aspect, a downlink transmission method is provided. The downlink transmission method includes: a first terminal receives a first data channel from a network device, and receives a first message from the network device, and then sends a second data channel to a second terminal. The first data channel carries the first data, the first message instructs the first terminal to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content Consistency.

In a possible design method, the downlink transmission method described in the second aspect may further include: the first terminal receives the first control channel from the network device. The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content. In other words, the first terminal may receive an explicit instruction from the network device and not split and/or merge the first data, so as to maintain the first data carried by the second data channel and the first data carried by the first data channel. The consistency of the data content of the data.

In another possible design method, the first terminal receiving the first data channel from the network device may include: the first terminal receives the first data channel from the network device on the first downlink resource, and The first downlink resource is a pre-configured resource or a resource configured by the network device through RRC signaling. Among them, RRC signaling is also called high-level signaling, semi-static signaling, etc. In other words, the first terminal can receive an implicit indication from the network device and does not split and/or merge the first data. For example, it can receive the first data on a designated downlink resource to maintain the second data channel bearer. The consistency of the data content of the first data and the first data carried by the first data channel.

In another possible design method, the above-mentioned first terminal sending the second data channel to the second terminal may include: the first terminal sends the second data channel to the second terminal on the first side row resource. That is, the first terminal can implicitly instruct the second terminal, and the first terminal does not split and/or merge the first data. For example, the first terminal can send the first data on the designated side resource to indicate the second terminal. The first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content.

Optionally, the first terminal may include: a physical layer, a media access control (media access control, MAC) layer, and a radio link control (radio link control, RLC) layer. Among them, the RLC layer is usually used for splitting and/or merging operations of data packets to be sent. Therefore, maintaining the consistency of data content between the first data carried by the second data channel and the first data carried by the first data channel may include:

The MAC layer receives the first data from the physical layer, and the MAC layer does not transfer the first data to the RLC layer. In other words, the MAC layer may not report the first data to the MAC layer, so as to prevent the RLC layer from splitting and/or merging the first data.

Or, optionally, the first data carried by the second data channel and the first data carried by the first data channel maintain data content consistency, which may include: the MAC layer receives the first data from the physical layer, and the MAC layer The first data is delivered to the RLC layer. The RLC layer returns the first data to the MAC layer. Among them, the first data returned by the RLC layer to the MAC layer and the first data transferred from the MAC layer to the RLC layer maintain the consistency of data content. For example, the first data received by the RLC layer may carry a physical layer identifier, and the physical layer identifier indicates that the RLC layer does not split and/or merge the first data. In other words, although the MAC layer reports the first data to the RLC layer, the RLC layer does not split and/or merge the first data, so as to ensure that the first data and the first data carried by the second data channel The consistency of the data content of the first data carried by the channel.

In the third aspect, a downlink transmission method is provided. The downlink transmission method includes: the second terminal receives a second data channel from the first terminal. The first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, and the first data carried by the first data channel is the data from the network device received by the first terminal. Then, the second terminal performs a decoding operation on the second data channel to obtain the first data.

In a possible design method, the foregoing second terminal receiving the second data channel from the first terminal may include: the second terminal receives the second data channel from the first terminal on the first side row resource. That is, the second terminal may receive an implicit indication from the first terminal, and the implicit indication is used to notify the second terminal that the first terminal has not performed any action on the first data carried by the first data channel received from the network device. Splitting and/or merging operations, such as sending first data on a designated side row resource to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of the data content .

Based on the downlink transmission method described in the first aspect to the third aspect, the first terminal can keep the first data received by the first terminal in the process of receiving the first data sent by the network device and forwarding it to the second terminal. The consistency of the data content of the first data forwarded by the first terminal, for example, the first terminal does not split and/or merge the first data, so that the second terminal can compare the first data received from multiple first terminals, and /Or, the first data directly received from the network device is combined and decoded to improve the decoding success rate.

In a fourth aspect, a communication device is provided. The communication device includes: a sending module. among them,

The sending module is configured to send the first data channel to the first terminal and send the first message to the first terminal. The first data channel carries the first data, the first message instructs the first terminal to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content Consistency.

In a possible design, the sending module is also used to send the first control channel to the first terminal. The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content. That is, the communication device may explicitly instruct the first terminal not to split and/or merge the first data, so as to maintain the data of the first data carried by the second data channel and the first data carried by the first data channel. Consistency of content.

In another possible design, the sending module is further configured to send the first data channel to the first terminal on the first downlink resource, where the first downlink resource is a pre-configured resource or the communication device is configured through RRC signaling Resources. In other words, the communication device can also implicitly instruct the first terminal not to split and/or merge the first data. For example, it can transmit the first data on a designated downlink resource to maintain the data carried by the second data channel. Consistency between the first data and the data content of the first data carried by the first data channel.

Optionally, the communication device described in the fourth aspect may further include a receiving module. Among them, the receiving module is used to receive data sent by a terminal device and another network device. Further, the receiving module and the sending module can be set separately or integrated into one module, namely the transceiver module. This application does not specifically limit the specific implementation of the receiving module and the sending module.

Optionally, the communication device described in the fourth aspect may further include a processing module and a storage module, and the storage module stores programs or instructions. When the processing module executes the program or instruction, the communication device described in the fourth aspect can execute the downlink transmission method described in the first aspect.

It should be noted that the communication device described in the fourth aspect can be a network device, a component or a combination device in a network device, or a chip or a chip system set in the network device, which is not covered by this application. limited.

For the technical effect of the communication device described in the fourth aspect, reference may be made to the technical effect of the downlink transmission method described in any of the possible implementation manners in the first aspect, which is not repeated here.

In a fifth aspect, a communication device is provided. The communication device includes: a receiving module and a sending module. Wherein, the receiving module is configured to receive the first data channel from the network device and receive the first message from the network device. Wherein, the first data channel carries the first data, the first message instructs the communication device to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content. consistency. The sending module is used to send the second data channel to the second terminal.

In a possible design, the receiving module is also used to receive the first control channel from the network device. The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content. In other words, the communication device may receive an explicit instruction from the network device, and does not split and/or merge the first data, so as to maintain the first data carried by the second data channel and the first data carried by the first data channel. The consistency of the data content.

In another possible design, the receiving module is further configured to receive the first data channel from the network device on the first downlink resource. Wherein, the first downlink resource is a pre-configured resource or a resource configured by the network device through RRC signaling. That is to say, the communication device can receive an implicit instruction from the network device, and does not split and/or merge the first data. For example, it can receive the first data on a designated downlink resource to maintain the second data channel bearer. The consistency of the data content of the first data and the first data carried by the first data channel.

In a possible design, the sending module is also used to send the second data channel to the second terminal on the first side row resource. In other words, the communication device can implicitly instruct the second terminal, and the communication device does not split and/or merge the first data. For example, the communication device can send the first data on the designated side resource to indicate the second data. The first data carried by the channel and the first data carried by the first data channel maintain the consistency of the data content.

It should be noted that the receiving module and the sending module described in the fifth aspect can be provided separately or integrated into one module, such as a transceiver module. This application does not specifically limit the specific implementation of the receiving module and the sending module.

Optionally, the communication device includes: a physical layer, a medium access control MAC layer, and a radio link control RLC layer. Among them, the RLC layer is usually used for splitting and/or merging operations of data packets to be sent. Therefore, the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, which may include: the MAC layer receives the first data from the physical layer, and the MAC layer does not send the data to the RLC layer. Pass the first data. In other words, the MAC layer may not report the first data to the MAC layer, so as to prevent the RLC layer from splitting and/or merging the first data.

Or, optionally, the first data carried by the second data channel and the first data carried by the first data channel maintain data content consistency, which may include: the MAC layer receives the first data from the physical layer, and the MAC layer The first data is transferred to the RLC layer; the RLC layer returns the first data to the MAC layer; wherein the first data returned by the RLC layer to the MAC layer and the first data transferred from the MAC layer to the RLC layer maintain the consistency of data content. In other words, although the MAC layer reports the first data to the RLC layer, the RLC layer does not split and/or merge the first data, so as to ensure that the first data and the first data carried by the second data channel The consistency of the data content of the first data carried by the channel.

Optionally, the communication device of the fifth aspect may further include a processing module and a storage module, and the storage module stores programs or instructions. When the processing module executes the program or instruction, the communication device described in the fifth aspect can execute the downlink transmission method described in the second aspect.

It should be noted that the communication device described in the fifth aspect may be a terminal device, such as a first terminal, a component or a combination device in the terminal device, or a chip or a chip system set in the terminal device. The application is not limited.

For the technical effect of the communication device described in the fifth aspect, reference may be made to the technical effect of the downlink transmission method described in any of the possible implementation manners in the second aspect, and details are not described herein again.

In a sixth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Wherein, the transceiver module is also used to receive the second data channel from the first terminal. The first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, and the first data carried by the first data channel is the data from the network device received by the first terminal. The processing module is used to perform a combined decoding operation on the second data channel to obtain the first data.

In a possible design, the transceiver module is also used to receive the second data channel from the first terminal on the first side row resource. Wherein, the first data received on the first side row resource maintains the consistency of the data content. That is, the communication device can receive an implicit instruction from the first terminal, and does not perform split and/or merging operations on the first data. For example, the communication device can receive the first data on a designated side resource to maintain the first data. The consistency of the data content.

It should be noted that the transceiver module described in the fifth aspect may include a receiving module and a sending module. Among them, the receiving module is used to receive data from another terminal device or network device; the sending module is used to send data to another terminal device or network device. This application does not specifically limit the specific implementation of the transceiver module.

Optionally, the communication device of the sixth aspect may further include a storage module, and the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device described in the sixth aspect can execute the downlink transmission method described in the third aspect.

It should be noted that the communication device described in the sixth aspect may be a terminal device, such as a second terminal, or a component or combination device in the terminal device, or a chip or chip system set in the terminal device. The application is not limited.

For the technical effect of the communication device described in the sixth aspect, reference may be made to the technical effect of the downlink transmission method described in any of the possible implementation manners of the third aspect, which will not be repeated here.

In a seventh aspect, a communication device is provided. The communication device includes a processor coupled with a memory, and the memory is used to store a computer program. The processor is configured to execute a computer program stored in the memory, so that the communication device executes the downlink transmission method described in any one of the possible implementation manners of the first aspect to the third aspect.

In a possible design, the communication device described in the seventh aspect may further include a transceiver. The transceiver can be a transceiver circuit or an input/output port. The transceiver can be used for the communication device to communicate with other communication devices.

In this application, the communication device described in the seventh aspect may be a terminal device or a network device, or a chip or a chip system provided in the terminal device or the network device.

For the technical effect of the communication device described in the seventh aspect, reference may be made to the technical effect of the downlink transmission method described in any implementation manner of the first aspect to the third aspect, and details are not described herein again.

In an eighth aspect, a chip system is provided. The chip system includes a processor and an input/output port. The processor is used to implement the processing functions involved in the first to third aspects, and the input/output port is used for Realize the transceiver functions involved in the first to third aspects.

In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and data for realizing the functions involved in the first aspect to the third aspect.

The chip system can be composed of chips, or include chips and other discrete devices.

In a ninth aspect, a communication system is provided. The system includes a network device and at least two terminal devices, such as a first terminal and a second terminal.

In a tenth aspect, a computer-readable storage medium is provided, including: computer instructions are stored in the computer-readable storage medium. When the computer instruction runs on the computer, the computer is caused to execute the downlink transmission method described in any one of the possible implementation manners of the first aspect to the third aspect.

In an eleventh aspect, a computer program product containing instructions is provided, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer can execute any one of the first aspect to the third aspect Possible implementations described in the downlink transmission method.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application;

FIG. 2 is a first structural diagram of a communication device provided by an embodiment of this application;

FIG. 3 is a schematic flowchart of a downlink transmission method provided by an embodiment of this application;

Figure 4 is a schematic diagram 1 of an existing downlink coordinated transmission scenario;

Figure 5 is a second schematic diagram of an existing downlink coordinated transmission scenario;

Fig. 6 is a third schematic diagram of an existing downlink coordinated transmission scenario;

FIG. 7 is a schematic diagram 1 of a downlink coordinated transmission scenario provided by an embodiment of this application;

FIG. 8 is a schematic diagram 2 of a downlink coordinated transmission scenario provided by an embodiment of this application;

FIG. 9 is a third schematic diagram of a downlink coordinated transmission scenario provided by an embodiment of this application;

FIG. 10 is a fourth schematic diagram of a downlink coordinated transmission scenario provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of a first terminal provided by an embodiment of this application;

FIG. 12 is a second structural diagram of a communication device provided by an embodiment of this application;

FIG. 13 is a third structural diagram of a communication device provided by an embodiment of this application;

FIG. 14 is a fourth structural diagram of a communication device provided by an embodiment of this application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as the first-generation wireless communication system based on an analog communication system, and the 2G wireless communication system represented by the global system for mobile communication (GSM). 3G wireless communication system represented by wideband code division multiple access (WCDMA), wireless fidelity (WiFi) system, vehicle to everything (V2X) communication system, equipment room ( device-todevie (D2D) communication system, car networking communication system, Internet of Things, autonomous driving, 4th generation (4G) mobile communication system, such as long term evolution (LTE) system, global interconnected microwave access (worldwide interoperability for microwave access, WiMAX) communication systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as the sixth generation (6th generation, 6G) Mobile communication system, etc.

This application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, and the like. It should be understood and understood that each system may include additional devices, components, modules, etc., and/or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, a combination of these schemes can also be used.

In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to represent examples, illustrations, or illustrations. Any embodiment or design solution described as an "example" in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. Rather, the term example is used to present the concept in a concrete way.

In the embodiments of this application, "information", "signal", "message", "channel", and "singalling" can sometimes be used together. It should be noted that, When the difference is not emphasized, the meaning to be expressed is the same. "的 (of)", "corresponding (relevant)" and "corresponding (corresponding)" can sometimes be used together. It should be pointed out that the meanings to be expressed are the same when the difference is not emphasized.

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.

Some scenarios in the embodiments of the present application are described by taking the scenario in the communication system shown in FIG. 1 as an example. It should be noted that the solutions in the embodiments of the present application can also be applied to other mobile communication systems, and the corresponding names can also be replaced with the names of corresponding functions in other mobile communication systems.

FIG. 1 is a schematic diagram of the architecture of a communication system to which the downlink transmission method provided in an embodiment of the application is applicable. 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. As shown in Figure 1, the communication system includes a first terminal, a second terminal and network equipment. The first terminal and the network device shown in FIG. 1 may be one or multiple. When there are multiple first terminals, the second terminal can communicate with multiple network devices at the same time through the multiple first terminals, or there can be one communication connection between multiple first terminals and the same network device through multiple first terminals. Communication connection. It is easy to understand that there may also be a communication connection between the second terminal and the network device, which is not limited in the embodiment of the present application.

Referring to FIG. 1, a network device is configured to send a first data channel to a first terminal and send a first message to the first terminal. The first data channel carries the first data, the first message instructs the first terminal to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content Consistency.

The first terminal is configured to receive the first data channel from the network device and receive the first message from the network device, and then send the second data channel to the second terminal.

In this way, optionally, the second terminal may receive the second data channel from the first terminal, and perform a decoding operation on the second data channel to obtain the first data.

Wherein, the above-mentioned network device may be any device with a wireless transceiving function. Including but not limited to: evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional NodeB), base station in NR (gNodeB or gNB) or transmission receiving point/transmission reception point (TRP), 3GPP Subsequent evolution of base stations, access nodes in the WiFi system, wireless relay nodes, wireless backhaul nodes, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. Multiple base stations can support networks of the same technology mentioned above, or networks of different technologies mentioned above. The base station can contain one or more co-site or non-co-site TRPs. The network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device can also be a server, a wearable device, or a vehicle-mounted device. The following description takes the network device as a base station as an example. The multiple network devices may be base stations of the same type, or base stations of different types. The base station can communicate with the terminal equipment, and it can also communicate with the terminal equipment through the relay station. The terminal device can communicate with multiple base stations of different technologies. For example, the terminal device can communicate with a base station that supports an LTE network, can also communicate with a base station that supports a 5G network, and can also support communication with a base station of an LTE network and a base station of a 5G network. Double connection.

The above-mentioned first terminal and second terminal are devices with wireless transceiver functions, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; they can also be deployed on water (such as ships, etc.); they can also be deployed in the air (For example, airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiving function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial control (industrial control) wireless terminals in control), vehicle-mounted terminal equipment, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety (transportation safety) Wireless terminals in ), wireless terminals in smart cities, wireless terminals in smart homes, wearable terminal devices, and so on. The embodiments of this application do not limit the application scenarios. Terminals can sometimes be called terminal equipment, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile Equipment, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc. The terminal can also be a fixed terminal or a mobile terminal.

It should be noted that the above-mentioned first terminal serves as a relay device between the second terminal and the network device, which may be a terminal device or a network device, which is not limited in the embodiment of the present application.

It should be understood that FIG. 1 is only a simplified schematic diagram of an example for ease of understanding, and the communication system may also include other network devices and/or other terminal devices, which are not shown in FIG. 1.

FIG. 2 is a schematic structural diagram of a communication device 200 that can be used to implement the downlink transmission method provided by an embodiment of the present application. The communication apparatus 200 may be a terminal device, such as the first terminal and the second terminal as shown in FIG. 1, or may be a chip applied to the terminal device or other components with terminal functions. It should be understood that the communication apparatus 200 may be a network device, or a chip applied to the network device or other components with network device functions.

As shown in FIG. 2, the communication device 200 may include a processor 201 and a memory 202. Optionally, the communication device 200 may further include a transceiver 203. The processor 201 is coupled with the memory 202 and the transceiver 203, for example, can be connected through a communication bus.

In the following, each component of the communication device 200 will be specifically introduced with reference to FIG. 2:

The processor 201 is the control center of the communication device 200, and may be a processor or a collective name for multiple processing elements. For example, the processor 201 is one or more central processing units (CPU), or an application specific integrated circuit (ASIC), or is configured to implement one or more of the embodiments of the present application. An integrated circuit, for example: one or more microprocessors (digital signal processors, DSP), or one or more field programmable gate arrays (FPGA).

The processor 201 can execute various functions of the communication device 200 by running or executing a software program stored in the memory 202 and calling data stored in the memory 202.

In a specific implementation, as an embodiment, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 2.

In a specific implementation, as an embodiment, the communication device 200 may also include multiple processors, such as the processor 201 and the processor 204 shown in FIG. 2. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

The memory 202 can be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM), or other types that can store information and instructions. The type of dynamic storage communication equipment can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage communication devices, or can be used to carry or store desired program codes in the form of instructions or data structures and Any other medium that can be accessed by the computer, but not limited to this. The memory 202 may exist independently, or may be integrated with the processor 201.

Wherein, the memory 202 is used to store a software program for executing the solution of the present application, and the processor 201 controls the execution. For the foregoing specific implementation manners, reference may be made to the following method embodiments, which will not be repeated here.

The transceiver 203 is used for communication with other communication devices. Of course, the transceiver 203 can also be used to communicate with a communication network. The transceiver 203 may include a receiver to implement a receiving function, and a transmitter to implement a sending function.

It should be noted that the structure of the communication device 200 shown in FIG. 2 does not constitute a limitation on the communication device. The actual communication device may include more or less components than those shown in the figure, or combine certain components, or Different component arrangements.

The downlink transmission method provided by the embodiment of the present application will be specifically described below in conjunction with FIG. 3 to FIG. 11.

As shown in Figure 3, the downlink transmission method includes:

S301: The network device sends a first data channel and a first message to the first terminal. Correspondingly, the first terminal receives the first data channel and the first message from the network device.

The first data channel carries the first data, the first message instructs the first terminal to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content Consistency.

Optionally, the first data channel may include a physical downlink shared channel (PDSCH), which is not limited in this application. Optionally, the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, which may include: not splitting and/or merging the first data carried by the first data channel Operation, or, the information bits of the first data carried by the second data channel are exactly the same as the information bits of the first data carried by the first data channel.

In the prior art, the network device sends the first data to the first terminal through the downlink (DL). If the signal quality of the downlink is good, the data packet sent by the network device to the first terminal is relatively large. If the signal quality of the downlink is poor, the data packet sent by the network device to the first terminal is relatively small. Then, the first terminal receives the data packet and sends it to the second terminal through the sidelink (SL). When the signal quality of the sidelink is poor, the first terminal will unpack the received data packet. Divide into multiple data packets and send data packets to the second terminal at a lower bit rate to improve the reliability of transmission. When the signal quality of the side link is good, the first terminal will receive multiple data packets. The packets are combined into one data packet, and the data packet is sent to the second terminal at a higher code rate to increase the data transmission rate. However, in the prior art, the new data packet generated after the splitting and/or merging operation by the first terminal does not have data consistency with the first data received by the first terminal, that is to say, splitting by the first terminal And/or the information bits of the new data packet generated after the merging operation have changed and are different from the information bits of the first data received by the first terminal.

The following first introduces how the first terminal performs merging and/or splitting operations on the received data in the prior art, and then describes how to implement the first terminal not to perform merging and/or splitting operations on the first data in an embodiment of the present application.

Exemplarily, the first terminal splitting and/or merging the first data may include: after the first terminal receives the first data from the network device, decodes the first data, and then decodes the successfully decoded data. The first data is split into multiple data. Fig. 4 is the first scenario intention of the existing downlink coordinated transmission. As shown in FIG. 4, the first terminal may split the first data into data A and data B. Among them, data A and data B may be data of the same size, or data of different sizes, which is not limited in the embodiment of the present application.

Exemplarily, the first terminal splitting and/or merging the first data may include: after the first terminal receives the first data from the network device, decodes the first data, and then decodes the successfully decoded data. The first data and the second data are combined into one data. Fig. 5 is a second schematic diagram of an existing downlink coordinated transmission scenario. As shown in Figure 5, the first terminal's operation of merging data may be: after receiving the first data from the network device, the first terminal decodes the first data, and then combines the successfully decoded first data with the second data. The data are cascaded together (merging operation) to form data C.

Exemplarily, the first terminal splitting and/or merging the first data may include: after the first terminal receives the first data from the network device, decodes the first data, and then decodes the successfully decoded data. The first data and the second data are cascaded, and the cascaded first data and the second data are split into multiple data. Fig. 6 is a third schematic diagram of an existing downlink coordinated transmission scenario. As shown in FIG. 6, the splitting operation of the data by the first terminal may also include: after the first terminal receives the first data from the network device, decodes the first data, and then combines the successfully decoded first data with The second data is cascaded to form data C, and then data C is split into data D, data E, and data F. Among them, the data D, the data E, and the data F may be data of the same size, or data of different sizes, or two of the data are data of the same size, which is not limited in the embodiment of the present application.

It should be noted that the above second data is data other than the first data, and may include: data that the first terminal itself needs to send to the second terminal, and/or the first terminal receives from other terminals or other network devices, And data that needs to be forwarded to the second terminal, and/or another data that the first terminal receives from the network device that receives the first data and needs to be forwarded to the second terminal. In other words, there may be one or more second data, and the second data may be any one or any combination of the above three kinds of data. It can be seen from Figures 4 to 6 that the prior art has actually destroyed the first data received by the first terminal and the first terminal when splitting and/or merging the first data and the second data. The consistency of the data content of the forwarded first data causes the second terminal to be unable to combine and decode the first data, resulting in a low decoding success rate of the first data. In the embodiment of the present application, the first terminal does not perform split and/or merging operations on the first data, and maintains the consistency of the data content of the first data received by the first terminal and the first data forwarded by the first terminal. This allows the second terminal to combine and decode the first data received from multiple first terminals and/or the first data directly received by the second terminal from the network device, thereby improving the decoding success rate.

In the embodiment of the present application, the above-mentioned first terminal does not perform split and/or merging operations on the first data, which may include: the first terminal puts the successfully decoded first data as a whole into the MAC buffer to form the data to be sent queue. Exemplarily, FIGS. 7-10 are schematic diagrams 1 to 4 of downlink coordinated transmission scenarios provided by embodiments of this application. As shown in Figures 7-10, the first terminal stores the first data in the MAC buffer as a whole, that is, the first terminal does not merge and/or split the first data, thereby maintaining the data received by the first terminal. The first data is consistent with the data content of the first data forwarded by the first terminal.

It should be noted that when the first terminal does not split and/or merge the first data, the first terminal may perform data other than the first data, such as one or more of the above-mentioned second data. Part of the data or all of the data is merged and/or split, or all the second data may not be merged and/or split. The following descriptions are made separately with reference to Figs. 7-10.

As shown in FIG. 7 and FIG. 8, the data received by the first terminal includes first data and one second data. While the first terminal does not perform the merging and/or splitting operation on the first data, it may not perform the split operation on the one second data, as shown in FIG. 7, or it may also perform the split operation on the one second data. The splitting operation, as shown in Figure 8, splits the second data into data G and data H. Wherein, the size of the data G and the data H may be the same or different, which is not limited in the embodiment of the present application.

As shown in FIG. 9 and FIG. 10, the data received by the first terminal includes first data and a plurality of second data, such as second data 1 and second data 2. As shown in FIG. 9, the first terminal may split the data J after the second data 1 and the second data 2 are concatenated into three data, such as data K, data L, and data M. The data K, the data L, and the data M may be data of the same size, or data of different sizes, or two of the data are data of the same size, which is not limited in the embodiment of the present application. As shown in FIG. 10, the first terminal may also combine the second data 1 and the second data 2 into one data, that is, data N.

In a possible design method, before step S301, the network device sends the first control channel to the first terminal. Correspondingly, the first terminal receives the first control channel from the network device.

The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain consistency in data content. That is, the network device may explicitly instruct the first terminal not to split and/or merge the first data, so as to maintain the data of the first data carried by the second data channel and the first data carried by the first data channel. Consistency of content.

Optionally, the first control channel may be: a physical downlink control channel (PDCCH). The first indication information may be sent in the downlink control information (DCI) of the downlink control channel, for example, it may be sent in the DCI carried by the PDCCH. The first indication information is used to indicate that the first data is data to be forwarded to the second terminal. After receiving the first indication information, the first terminal does not split and divide the first data carried by the received first data channel. / Or merge operation.

In another possible design method, the network device may also implicitly instruct the first terminal not to split and/or merge the first data, so as to maintain the first data and the first data channel carried by the second data channel. The consistency of the data content of the first data carried. Therefore, optionally, the foregoing S301 may include:

The network device sends the first data channel to the first terminal on the first downlink resource. Correspondingly, the first terminal receives the first data channel from the network device on the first downlink resource.

Wherein, the first downlink resource is a pre-configured resource or a resource configured by a network device through RRC signaling.

Optionally, the first downlink resource may include frequency domain resources, time domain resources, space domain resources, code domain resources, etc., which are not limited here.

In other words, the network device can also implicitly instruct the first terminal not to split and/or merge the received first data, so as to maintain the first data carried by the second data channel and the data carried by the first data channel. The consistency of the data content of the first data, for example, the first data can be transmitted on the designated downlink resource, and the first terminal does not split and/or merge the first data after receiving the first data on the designated downlink resource Therefore, the consistency of the data content of the first data carried by the second data channel and the first data carried by the first data channel is maintained.

Or, optionally, the first terminal may also not perform split and/or merge operations on all the data that needs to be forwarded. At this time, the first terminal may not receive any indication information from the network device, so as to save signaling overhead. This method can also be regarded as another implicit indication method.

It should be noted that there may be one or multiple first terminals, which is not limited in the embodiment of the present application. When there is one first terminal, the network device sends a first data channel to the first terminal 1. When there are multiple first terminals, the network device sends a first data channel to each of the multiple first terminals. For example, the network device sends the first data channel 1 to the first terminal 1, and the network device sends the first data channel to the first terminal 2. For a data channel 2, the network device sends the first data channel 3 to the first terminal 3.

S302: The first terminal sends a second data channel to the second terminal. Correspondingly, the second terminal receives the second data channel from the first terminal.

Wherein, the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content.

Exemplarily, the second data channel may be a physical sidelink shared channel (PSSCH).

The second terminal may be a target terminal of the first terminal, the first terminal may be a cooperative terminal of the second terminal, and the first terminal and the second terminal belong to the same user cooperation group.

Exemplarily, FIG. 11 is a schematic structural diagram of a first terminal provided in an embodiment of this application. As shown in Figure 11, the first terminal includes a physical layer, a media access control MAC layer, and a radio link control RLC layer. The first terminal may also include a packet data convergence protocol (PDCP) layer and a session layer. , Presentation layer, application layer, etc.

In the existing coordinated downlink transmission, the physical layer is used to decode the received data and pass it to the MAC layer. The MAC layer then passes the data to the RLC layer. The RLC layer disassembles the data to be sent to the second terminal. For the division and/or merging operation, please refer to the above-mentioned Figure 4 to Figure 6 for specific implementation, which will not be repeated here.

In a possible design method, the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, which can be specifically implemented as follows:

The MAC layer receives the first data from the physical layer, and the MAC layer does not transfer the first data to the RLC layer. or,

The MAC layer receives the first data from the physical layer, and the MAC layer transfers the first data to the RLC layer, and the RLC layer returns the first data to the MAC layer. Among them, the first data returned by the RLC layer to the MAC layer and the first data transmitted by the MAC layer to the RLC layer maintain the consistency of data content. For specific implementation, refer to the related content of FIG. 7 to FIG. 10, which will not be repeated here.

Optionally, after the MAC layer receives the first data from the physical layer, the MAC layer may not transfer the first data to the RLC layer, but directly store the first data in the MAC buffer to prevent the RLC layer from splitting and dividing the first data. / Or merge operation. For example, the MAC layer may not transfer the first data to the RLC layer according to the physical layer identifier carried in the received first data, but put the first data into the MAC buffer to avoid the RLC layer from disassembling the first data. Divide and/or merge operations.

Or, optionally, the MAC layer receives the first data from the physical layer, the MAC layer may also transfer the first data to the RLC layer, the RLC layer returns the first data to the MAC layer, and the RLC layer returns the first data to the MAC layer The consistency of the data content is maintained with the first data transferred from the MAC layer to the RLC layer. The first data received by the RLC layer may carry a physical layer identifier, which indicates that the RLC layer does not split and/or merge the first data, and the RLC layer is the first data plus the packet header and the RLC layer is the first The header of the data removed is the same.

Specifically, the first data can be divided into a header and a payload. The header can include information such as a destination address and a source address, and the payload is valid data. After receiving the first data transmitted by the physical layer, the MAC layer performs the MAC layer header removal operation on the first data, and transfers the first data with the MAC layer header removed to the upper layer (RLC layer), and the upper layer receives the first data After one data, the first data is similarly de-headed until the first data is passed to the top layer (application layer), and then the first data is passed down from the top layer, and when the first data is passed down from the top layer, receive The first data layer adds headers to the first data, and the header added when each layer transmits the first data downward is the same as the header removed when the layer transmits the first data upwards, so as to ensure the second data channel The consistency of the data content of the first data carried and the first data carried by the first data channel. In the prior art, the header added when each layer transmits the first data downward is different from the header removed when the layer transmits the first data upward.

Exemplarily, after receiving the first data, the MAC layer performs header removal processing on the first data to obtain first data 1, and transfers the first data 1 to the RLC layer, and the RLC layer performs the RLC layer header removal operation on the first data 1 , Get the first data 2 and continue to pass to the upper layer, after passing to the top layer, then pass to the next layer, after passing to the RLC layer, the RLC layer adds the RLC layer header to the first data to obtain the first data n, The first data n is the same as the first data 1. Similarly, the first data returned by the PDCP layer to the RLC layer is the same as the first data received by the PDCP layer from the RLC layer, and other layers are similar. In other words, the data received by each layer from the next layer is the same as the data returned by the layer to the next layer. Finally, it is ensured that the first data returned by the RLC layer to the MAC layer and the first data passed by the MAC layer to the RLC layer retain the data. Consistency of content.

Optionally, after the first terminal stores the first data carried by the first data channel in the MAC buffer, the first terminal may not send a buffer status report (buffer status report, BSR) to the network device. The BSR is used to request the network device to allocate the first side row resource for the first terminal, and the first side row resource is used for the first terminal to send the second data channel to the second terminal.

Since the first terminal does not split and/or merge the first data from the network device, the first data to be forwarded to the second terminal and the first data received from the network device maintain the consistency of the data content . Moreover, since the size of the first data has not changed, when the first terminal forwards the first data to the second terminal, it is not necessary for the first terminal to report the size of the first data to be forwarded to the network device. The network device can The size of the first data directly allocates side row resources for the first data.

S303: The second terminal performs a decoding operation on the second data channel to obtain the first data.

Exemplarily, after receiving the second data channel from the first terminal, the second terminal performs a decoding operation on it to obtain the first data.

Further, the number of first terminals may be one or more. When there are multiple first terminals, the second terminal may receive multiple first data sent by the network device via multiple first terminals, and the first terminal The plurality of received first data is not split and/or combined, and the first data received by the second terminal and the first data sent by the network device maintain the consistency of the data content. Therefore, the second terminal can combine and decode multiple first data (also referred to as joint decoding), which can improve the decoding success rate, thereby improving the receiving performance of the terminal.

In addition, in addition to the first data received by the second terminal from one or more first terminals, the second terminal may also receive the first data sent by the network device on the downlink resource. Then, the second terminal may combine and decode the first data from the network device and the first data from one or more first terminals to improve the decoding success rate. Therefore, optionally, the downlink transmission method shown in FIG. 3 may further include the following steps:

The network device sends a third data channel to the second terminal, and the third data channel carries the first data. Correspondingly, the second terminal receives the third data channel from the network device. The second terminal combines and decodes the second data channel and the third data channel to obtain the first data.

It is understandable that the data carried by the second data channel and the third data channel are the same, and both are the first data. The second terminal can combine and decode multiple first data carried by multiple second data channels, or The multiple first data carried by the second data channel and the third data channel are combined and decoded to obtain the first data, thereby improving the success rate of decoding the first data.

Based on the downlink transmission method shown in Figure 3, the first terminal can keep the first data received from the network device and forward it to the second terminal during the process of receiving the first data sent by the network device and forwarding it to the second terminal. The consistency of the data content of the first data, for example, the first terminal does not split and/or merge the first data, so that the second terminal can directly check the first data received from multiple first terminals, and/or directly The first data received from the network device is combined and decoded to improve the decoding success rate.

The downlink transmission method provided by the embodiment of the present application is described in detail above with reference to FIGS. 3 to 11. The communication device provided by the embodiment of the present application will be described in detail below with reference to FIGS. 12-14.

FIG. 12 is a second structural diagram of a communication device provided by an embodiment of the present application. The communication device can be applied to the communication system shown in FIG. 1 to perform the function of the network device in the downlink transmission method shown in FIG. 3. For ease of description, FIG. 12 only shows the main components of the communication device.

As shown in FIG. 12, the communication device 1200 includes: a sending module 1201.

Wherein, the sending module 1201 is configured to send the first data channel to the first terminal and send the first message to the first terminal. The first data channel carries the first data, the first message instructs the first terminal to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content Consistency.

In a possible design, the sending module 1201 is also used to send the first control channel to the first terminal. The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content. That is to say, the communication device 1200 shown in FIG. 12 can explicitly instruct the first terminal not to split and/or merge the first data, so as to maintain the first data carried by the second data channel and the first data channel carried The consistency of the data content of the first data.

In another possible design, the sending module 1201 is further configured to send the first data channel to the first terminal on the first downlink resource. Wherein, the first downlink resource is a pre-configured resource or a resource configured by a network device through RRC signaling. In other words, the communication device 1200 can also implicitly instruct the first terminal not to split and/or merge the first data. For example, it can transmit the first data on a designated downlink resource to maintain the second data channel bearer. The consistency of the data content of the first data and the first data carried by the first data channel.

Optionally, the communication device 1200 shown in FIG. 12 may further include a receiving module 1202. Among them, the receiving module 1202 is used to receive data sent by a terminal device and another network device.

Optionally, the communication device 1200 shown in FIG. 12 may further include a processing module 1203 and a storage module (not shown in FIG. 12), and the storage module stores programs or instructions. When the processing module 1203 executes the program or instruction, the communication device 1200 shown in FIG. 12 can execute the function of the network device in the downlink transmission method shown in FIG. 3.

It should be noted that the communication device 1200 may be the network device shown in FIG. 1 or the communication device 200 shown in FIG. 2, or may be a chip or chip system provided in the network device or communication device 200. The implementation of this application The example does not limit this. When the communication device 1200 is a network device, the receiving module 1202 and the sending module 1201 can be set separately or integrated into one module, namely the transceiver module. This application does not specify the specific implementation of the receiving module 1202 and the sending module 1201. By limitation, the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, and the processing module 1203 may be a processor, such as a central processing unit (CPU). When the communication device 1200 is a component having the above-mentioned network device function, the transceiver module may be a radio frequency unit, and the processing module 1203 may be a processor. When the communication device 1200 is a chip system, the sending module 1201 may be an output interface of the chip system, the receiving module 1202 may be an input interface of the chip system, and the processing module 1203 may be a processor of the chip system.

For the technical effect of the communication device 1200 shown in FIG. 12, reference may be made to the technical effect of the downlink transmission method shown in FIG. 3, which will not be repeated here.

FIG. 13 is a third structural diagram of a communication device provided by an embodiment of the present application. The communication device can be applied to the communication system shown in FIG. 1 to perform the function of the first terminal in the downlink transmission method shown in FIG. 3. For ease of description, FIG. 13 only shows the main components of the communication device.

As shown in FIG. 13, the communication device 1300 includes: a sending module 1301 and a receiving module 1302.

Wherein, the receiving module 1302 is configured to receive the first data channel from the network device and receive the first message from the network device. Wherein, the first data channel carries the first data, the first message instructs the communication device to send the second data channel to the second terminal, and the first data carried by the second data channel and the first data carried by the first data channel maintain data content. consistency. The sending module 1301 is configured to send the second data channel to the second terminal.

In a possible design, the receiving module 1302 is also used to receive the first control channel from the network device. The first control channel carries first indication information, and the first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content. In other words, the communication apparatus 1300 may not split and/or merge the first data according to an explicit instruction from the network device, so as to maintain the first data carried by the second data channel and the first data carried by the first data channel. The consistency of the data content of the data.

In another possible design, the receiving module 1302 is further configured to receive the first data channel from the network device on the first downlink resource. Wherein, the first downlink resource is a pre-configured resource or a resource configured by the network device through RRC signaling. That is to say, the communication apparatus 1300 may not perform split and/or merging operations on the first data according to an implicit instruction from the network device. For example, the communication device 1300 may receive the first data on a designated downlink resource to maintain the second data channel bearer. The consistency of the data content of the first data and the first data carried by the first data channel.

In a possible design, the sending module 1301 is also used to send the second data channel to the second terminal on the first side row resource. That is, the communication device 1300 can implicitly instruct the second terminal, and the communication device 1300 does not split and/or merge the first data. For example, the communication device 1300 can send the first data on a designated side resource to indicate the second terminal. The first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content.

Optionally, the communication device 1300 includes: a physical layer, a medium access control MAC layer, and a radio link control RLC layer. Among them, the RLC layer is usually used to split and/or merge the data packets to be sent. Therefore, the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, which may include: the MAC layer receives the first data from the physical layer, and the MAC layer does not send the data to the RLC layer. Transfer the first data. In other words, the MAC layer may not report the first data to the MAC layer, so as to prevent the RLC layer from splitting and/or merging the first data.

Or, optionally, the first data carried by the second data channel and the first data carried by the first data channel maintain data content consistency, which may include: the MAC layer receives the first data from the physical layer, and the MAC layer The first data is transferred to the RLC layer; the RLC layer returns the first data to the MAC layer; wherein the first data returned by the RLC layer to the MAC layer and the first data transferred from the MAC layer to the RLC layer maintain the consistency of data content. For example, the first data received by the RLC layer may carry a physical layer identifier, and the physical layer identifier indicates that the RLC layer does not split and/or merge the first data. In other words, although the MAC layer reports the first data to the RLC layer, the RLC layer does not split and/or merge the first data, so as to ensure that the first data and the first data carried by the second data channel The consistency of the data content of the first data carried by the channel.

Optionally, the communication device 1300 shown in FIG. 13 may further include a processing module 1303 and a storage module (not shown in FIG. 13), and the storage module stores programs or instructions. When the processing module 1303 executes the program or instruction, the communication device 1300 shown in FIG. 13 can execute the function of the first terminal in the downlink transmission method shown in FIG. 3.

It should be noted that the above-mentioned communication device 1300 may be the network device shown in FIG. 1 or the communication device 200 shown in FIG. 2, or may be a chip or a chip system provided in the above-mentioned network device or communication device 200. The implementation of this application The example does not limit this. When the communication device 1300 is a network device, the receiving module 1302 and the sending module 1301 can be set separately, or they can be integrated into one module, namely the transceiver module. This application does not make specific implementations of the receiving module 1302 and the sending module 1301. By limitation, the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module 1303 may be a processor, such as a central processing unit (CPU). When the communication device 1300 is a component having the above-mentioned network device function, the transceiver module may be a radio frequency unit, and the processing module 1303 may be a processor. When the communication device 1300 is a chip system, the sending module 1301 may be an output interface of the chip system, the receiving module 1302 may be an input interface of the chip system, and the processing module 1303 may be a processor of the chip system.

For the technical effect of the communication device 1300 shown in FIG. 13, reference may be made to the technical effect of the downlink transmission method shown in FIG. 3, which will not be repeated here.

FIG. 14 is a fourth structural diagram of a communication device provided by an embodiment of the present application. The communication device can be applied to the communication system shown in FIG. 1 to perform the function of the second terminal in the downlink transmission method shown in FIG. 3. For ease of description, FIG. 14 only shows the main components of the communication device.

As shown in FIG. 14, the communication device 1400 includes: a transceiver module 1401 and a processing module 1402.

Wherein, the transceiver module 1401 is also used to receive the second data channel from the first terminal. The first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of data content, and the first data carried by the first data channel is the data from the network device received by the first terminal. The processing module 1402 is configured to perform a combined decoding operation on the second data channel to obtain the first data.

In a possible design, the transceiver module 1401 is also used to receive the second data channel from the first terminal on the first side row resource. Wherein, the first data received on the first side row resource and the first data carried by the first data channel maintain the consistency of data content. That is, the communication apparatus 1400 may receive an implicit indication from the first terminal, and the implicit indication is used to notify the communication apparatus 1400 that the first terminal has not performed any action on the first data carried by the first data channel received from the network device. Splitting and/or merging operations, such as sending first data on a designated side row resource to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain the consistency of the data content .

Further, the number of first terminals may be one or more. When there are multiple first terminals, the communication apparatus 1400 may receive multiple first data sent by the network device via multiple first terminals, and the multiple The first terminal does not perform splitting and/or merging operations on the multiple received first data, and the first data received by the communication device 1400 and the first data sent by the network device both maintain the consistency of the data content. Therefore, the communication device 1400 can combine and decode multiple first data (also referred to as joint decoding) to improve the decoding success rate, thereby improving the receiving performance of the terminal.

In addition, in addition to the first data received by the communication apparatus 1400 from one or more first terminals, the communication apparatus 1400 may also receive the first data sent by the network device on the downlink resource. Then, the communication device 1400 may combine and decode the first data from the network device and the first data from one or more first terminals to improve the decoding success rate.

It should be noted that the transceiver module 1401 may include a receiving module (not separately shown in FIG. 14) and a sending module (not separately shown in FIG. 14). Among them, the receiving module is used to receive data from another terminal device or network device; the sending module is used to send data to another terminal device or network device. This application does not specifically limit the specific implementation of the transceiver module 1401.

Optionally, the communication device 1400 shown in FIG. 14 may further include a storage module (not shown in FIG. 14), and the storage module stores programs or instructions. When the processing module 1402 executes the program or instruction, the communication device 1400 shown in FIG. 14 can execute the function of the second terminal in the downlink transmission method shown in FIG. 3.

It should be noted that the communication device 1400 shown in FIG. 14 may be a terminal device, such as a second terminal, a component or combination device in the terminal device, or a chip or a chip system set in the terminal device. The application is not limited.

It should be noted that the above-mentioned communication device 1400 may be the network device shown in FIG. 1 or the communication device 200 shown in FIG. 2, or may be a chip or a chip system provided in the above-mentioned network device or communication device 200. The implementation of this application The example does not limit this. When the communication device 1400 is a network device, the transceiver module 1401 may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module 1402 may be a processor, such as a central processing unit (CPU). When the communication device 1400 is a component having the above-mentioned network device function, the transceiver module 1401 may be a radio frequency unit, and the processing module 1402 may be a processor. When the communication device 1400 is a chip system, the transceiver module 1401 may be an input and output interface of the chip system, and the processing module 1402 may be a processor of the chip system.

For the technical effect of the communication device 1400 shown in FIG. 14, reference may be made to the technical effect of the downlink transmission method shown in FIG. 3, which will not be repeated here.

An embodiment of the present application provides a chip system that includes a processor and an input/output port, the processor is used to implement the processing functions involved in the foregoing method embodiment, and the input/output port is used to implement the foregoing method implementation The sending and receiving functions involved in the example.

In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and data that implement the functions involved in the foregoing method embodiments.

The embodiment of the present application provides a communication system. The communication system includes a network device and at least two terminal devices, such as a first terminal and a second terminal.

The embodiment of the present application provides a computer-readable storage medium, including: the computer-readable storage medium stores computer instructions; when the computer instructions run on a computer, the computer executes the downlink transmission described in the foregoing method embodiment method.

The embodiment of the present application provides a computer program product containing instructions, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer executes the downlink transmission method described in the foregoing method embodiment.

It should be understood that the processor in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), and synchronous dynamic random access memory (DRAM). Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The foregoing embodiments may be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination. When implemented using software, the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this text is only an association relationship describing the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A alone exists, and A and B exist at the same time. , There are three cases of B alone, where A and B can be singular or plural. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and/or" relationship, which can be understood with reference to the context.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A downlink transmission method, characterized in that it comprises:

The network device sends a first data channel to the first terminal; wherein the first data channel carries first data;

The network device sends a first message to the first terminal, and the first message instructs the first terminal to send a second data channel to a second terminal; wherein, the first data channel carried by the second data channel The data maintains the consistency of data content with the first data carried by the first data channel.
The downlink transmission method according to claim 1, wherein the downlink transmission method further comprises:

The network device sends a first control channel to the first terminal; wherein, the first control channel carries first indication information, and the first indication information is used to indicate the second data channel carried by the second data channel. A piece of data maintains consistency of data content with the first data carried by the first data channel.
The downlink transmission method according to claim 1, wherein the sending of the first data channel by the network device to the first terminal comprises:

The network device sends the first data channel to the first terminal on a first downlink resource, where the first downlink resource is a pre-configured resource or a resource configured by the network device through RRC signaling.
A downlink transmission method, characterized in that it comprises:

The first terminal receives a first data channel from a network device; wherein, the first data channel carries first data;

The first terminal receives a first message from the network device, the first message instructs the first terminal to send a second data channel to a second terminal; wherein, the second data channel carried by the second data channel One piece of data maintains consistency of data content with the first data carried by the first data channel;

The first terminal sends the second data channel to the second terminal.
The downlink transmission method according to claim 4, wherein the downlink transmission method further comprises:

The first terminal receives a first control channel from the network device; wherein, the first control channel carries first indication information, and the first indication information is used to indicate the The first data and the first data carried by the first data channel maintain consistency of data content.
The downlink transmission method according to claim 4, wherein the first terminal receiving the first data channel from the network device comprises:

The first terminal receives the first data channel from the network device on a first downlink resource, where the first downlink resource is a pre-configured resource or a resource configured by the network device through RRC signaling .
The downlink transmission method according to claim 4, wherein the sending of the second data channel by the first terminal to the second terminal comprises:

The first terminal sends the second data channel to the second terminal on the first side row resource.
The downlink transmission method according to any one of claims 4-7, wherein the first terminal includes a physical layer, a medium access control MAC layer, and a radio link control RLC layer;

The maintaining consistency of data content between the first data carried by the second data channel and the first data carried by the first data channel includes:

The MAC layer receives the first data from the physical layer, and the MAC layer does not transfer the first data to the RLC layer;

or,

The MAC layer receives the first data from the physical layer, and the MAC layer transfers the first data to the RLC layer; the RLC layer returns the first data to the MAC layer; Wherein, the first data returned by the RLC layer to the MAC layer and the first data transferred by the MAC layer to the RLC layer maintain the consistency of data content.
A communication device, characterized by comprising: a sending module; wherein,

The sending module is configured to send a first data channel to a first terminal; wherein the first data channel carries first data;

The sending module is further configured to send a first message to the first terminal, the first message instructing the first terminal to send a second data channel to the second terminal; wherein the second data channel carries The first data and the first data carried by the first data channel maintain consistency of data content.
The communication device according to claim 9, wherein the sending module is further configured to send a first control channel to the first terminal; wherein the first control channel carries first indication information, and the The first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain data content consistency.
The communication device according to claim 9, wherein:

The sending module is further configured to send the first data channel to the first terminal on a first downlink resource, where the first downlink resource is a pre-configured resource or the communication device uses RRC signaling Configured resources.
A communication device, characterized by comprising: a receiving module and a sending module; wherein,

The receiving module is configured to receive a first data channel from a network device; wherein, the first data channel carries first data;

The receiving module is further configured to receive a first message from the network device, the first message instructing the communication device to send a second data channel to a second terminal; wherein, all the data carried by the second data channel The first data and the first data carried by the first data channel maintain consistency of data content;

The sending module is configured to send the second data channel to the second terminal.
The communication device according to claim 12, wherein the receiving module is further configured to receive a first control channel from the network device; wherein, the first control channel carries first indication information, and the The first indication information is used to indicate that the first data carried by the second data channel and the first data carried by the first data channel maintain data content consistency.
The communication device according to claim 12, wherein:

The receiving module is further configured to receive the first data channel from the network device on a first downlink resource, where the first downlink resource is a pre-configured resource or the communication device uses RRC signaling Configured resources.
The communication device according to claim 12, wherein the sending module is further configured to send the second data channel to the second terminal on the first side row resource.
The communication device according to any one of claims 12-15, wherein the communication device comprises a physical layer, a medium access control MAC layer, and a radio link control RLC layer;

The maintaining consistency of data content between the first data carried by the second data channel and the first data carried by the first data channel includes:

The MAC layer receives the first data from the physical layer, and the MAC layer does not transfer the first data to the RLC layer;

or,

The MAC layer receives the first data from the physical layer, and the MAC layer transfers the first data to the RLC layer; the RLC layer returns the first data to the MAC layer; Wherein, the first data returned by the RLC layer to the MAC layer and the first data transferred by the MAC layer to the RLC layer maintain the consistency of data content.
A communication device, characterized in that, the communication device comprises: a processor, and the processor is coupled with a memory;

The memory is used to store a computer program;

The processor is configured to execute the computer program stored in the memory, so that the communication device implements the downlink transmission method according to any one of claims 1-8.
A chip system, characterized in that, the chip system includes a processor and an input/output port, the processor is coupled with a memory containing instructions, and is used to control a communication device installed with the chip system to realize the implementation as claimed in claim 1- 8. The downlink transmission method described in any one of 8.
A computer-readable storage medium, wherein the computer-readable storage medium includes a program or instruction, and when the program or instruction runs on a computer, the computer executes any one of claims 1-8. The downlink transmission method described in item.
A computer program product, characterized in that the computer program product comprises: computer program code, when the computer program code is run on a computer, the computer is caused to execute any one of claims 1-8 The downlink transmission method.