WO2022170976A1

WO2022170976A1 - Data transmission method and communication apparatus

Info

Publication number: WO2022170976A1
Application number: PCT/CN2022/073971
Authority: WO
Inventors: 刘荣宽; 张鹏; 张佳胤; 周国华
Original assignee: 华为技术有限公司
Priority date: 2021-02-10
Filing date: 2022-01-26
Publication date: 2022-08-18
Also published as: CN114916069A

Abstract

A data transmission method and a communication apparatus, which are used for simplifying an interaction flow and reducing a scheduling delay during a collaborative transmission process of a terminal. In the present application, the method comprises: a network device receiving a resource request from a first terminal, wherein the resource request is used for requesting a transmission resource of first data; the network device sending a sidelink indication to the first terminal, wherein the sidelink indication is used for indicating a sidelink resource, the sidelink resource is used for the transmission of second data between the first terminal and a second terminal, and the second data is part or all of the first data; and the network device sending a first uplink indication to the second terminal, wherein the first uplink indication is used for indicating a first uplink resource, and the first uplink resource is used for the transmission of the second data between the second terminal and the network device.

Description

A data transmission method and communication device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202110185194.7 and the application title "A data transmission method and communication device" filed with the China Patent Office on February 10, 2021, the entire contents of which are incorporated into this application by reference middle.

technical field

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

Background technique

Data is one of the core elements of industrial scenarios, and the interaction of data in industrial scenarios requires the support of connections. As a breakthrough wireless connection technology, 5G NR can help devices in industrial scenarios to achieve comprehensive connectivity, thereby significantly reducing wiring and construction costs for industrial data collection in smart factories. On the one hand, industrial cameras, robots, automatic guided vehicles, augmented reality (AR) head-mounted displays and other devices in industrial scenarios will generate large-data packets and large-traffic services at the sending end, which puts forward ultra-large capacity requirements for uplink transmission of communication systems. Every thousand square meters needs to support an uplink rate of the order of Gbps. On the other hand, due to the large number and variety of industrial transmitting terminals, the number of transmitting antennas in the system is limited and the uplink transmission bandwidth is limited, which limits the data transmission capability of a single terminal. Therefore, for industrial scenarios with large upstream capacity requirements, new technical means are required to further increase the rate to meet the needs of large data packet services.

For large data packet transmission, terminal cooperative transmission can improve the end-to-end transmission rate. Exemplarily, the first terminal generates a large data packet (represented as data A), the data A needs to be sent to the network device, and the second terminal can assist the first terminal to send the data A. Specifically, the first terminal divides the data A into are two small data (represented as data B and data C respectively), the first terminal sends data B to the second terminal based on the scheduling of the network device, and if the second terminal successfully receives data B, it feeds back an affirmative response to the first terminal (acknowledgement, ACK), the corresponding first terminal sends an ACK to the network device based on the ACK from the second terminal. After that, the first terminal sends the data C to the network device based on the scheduling of the network device, and the second terminal sends the data B to the network device based on the scheduling of the network device.

After the network device receives the ACK from the first terminal, that is, after the network device determines that the first terminal has successfully sent data B to the second terminal, the network device schedules the first terminal and the second terminal to send data C and data B respectively. . In the cooperative transmission process of the terminals, the interaction process is relatively complicated, and the scheduling time is prolonged.

SUMMARY OF THE INVENTION

The present application provides a data transmission method and a communication device, which are used to simplify the interaction process and reduce the scheduling delay in the process of terminal cooperative transmission.

In a first aspect, the present application provides a data transmission method, the method includes: a network device receives a resource request from a first terminal, the resource request is used to request transmission resources of the first data; the network device sends a sideline indication to the first terminal , the sideline indication is used to indicate the sideline resource, the sideline resource is used for the transmission of the second data between the first terminal and the second terminal, and the second data is part or all of the first data; A first uplink indication is sent, where the first uplink indication is used to indicate a first uplink resource, and the first uplink resource is used for transmission of the second data between the second terminal and the network device.

In the above technical solution, the network device receives a resource request from the first terminal, sends a sideline indication to the first terminal according to the resource request, and sends a first uplink indication to the second terminal, wherein the sideline indication is used to instruct the first terminal to The resources for the second terminal to send the second data, the first uplink indication is used to instruct the second terminal to send the resources of the second data to the network device, based on this, the network device does not need to wait for the first terminal to successfully send the second data to the second terminal , simplifies the interaction process in the terminal cooperative transmission process, and helps to reduce the scheduling delay.

In a possible implementation manner, the first uplink indication occupies the first downlink resource, and the position of the time domain resource in the first downlink resource is before the position of the time domain resource in the side link resource.

In the above technical solution, in the communication system, control information (such as the first uplink indication and sideline indication) is first transmitted on the control plane, and then data (such as the second data) is transmitted on the user plane to isolate the control plane from the user plane. It can effectively improve the communication efficiency and ensure the stability of the communication.

In a possible implementation manner, the sidelink indication includes identification information of sidelink transmission between the first terminal and the second terminal, the first uplink indication includes identification information, and the identification information is used to associate with the first terminal. Data transmitted on uplink resources and data transmitted on sideline resources.

In the above technical solution, both the sideline indication and the first uplink indication include identification information of the sidelink transmission between the first terminal and the second terminal, which represents the sideline transmission between the first terminal and the second terminal. The data transmitted in the link and the data transmitted in the uplink between the second terminal and the network device are related, so that the second terminal will transmit the data received on the sidelink resource through the first uplink resource. to the network device. The second terminal does not need to send the hybrid automatic retransmission request confirmation information to the first terminal, which helps to reduce the number of signaling interactions.

In a possible implementation manner, the time domain resources in the first uplink resources may be determined by the time domain resources in the sidelink resources and the processing capability of the second terminal. The processing capability of the second terminal is used to indicate the first duration, the first duration is the sum of the second duration and the third duration, and the second duration is the second terminal decodes the data transmitted on the sideline resource to obtain the second data The third duration is the duration that the second terminal encodes the second data and obtains the data transmitted on the first uplink resource; the starting position of the time domain resource in the first uplink resource and the time domain resource in the sideline resource The duration between the end positions of is greater than or equal to the first duration.

In the above technical solution, the network device considers the decoding process of the second terminal after receiving the second data, and the encoding process before the second terminal sends the second data, which helps to ensure that the second terminal does not process the second data until it is completed. The second data is sent to the network device, and also helps to avoid wasting resources.

In a possible implementation manner, the first uplink indication is also used to indicate the second uplink resource, and the second uplink resource is used to transmit the hybrid automatic repeat request confirmation between the network device and the second terminal, and the hybrid automatic repeat request The acknowledgment is used to indicate the transmission status of the second data on the sideline resource.

In the above technical solution, the network device may also instruct the second terminal to feed back the resources of the hybrid automatic retransmission request acknowledgment information to the second terminal, and the hybrid automatic retransmission request acknowledgment information may be uplink control information or uplink data. The receiving status of the second data (or according to the receiving status/transmission status of the second data on the sideline resource), the hybrid automatic repeat request confirmation information is sent to the network device. Correspondingly, the network device can The hybrid automatic retransmission request confirmation information determines whether to schedule retransmission, and how to schedule retransmission when scheduling retransmission, which helps to improve the efficiency of terminal cooperative transmission.

In a possible implementation manner, the method further includes: the network device sends a second uplink indication to the first terminal, the second uplink indication is used to indicate a third uplink resource, and the third uplink resource is used for the third data to be transmitted between the first terminal and the first terminal. In transmission between network devices, the third data is part or all of the first data.

In the above technical solution, the network device may also allocate a third uplink resource for the first terminal to send the third data, and the first terminal may send the third data to the network device on the third uplink resource, so that the first terminal and the second terminal communicate with each other. The terminal can send its own data to the network device respectively, which helps to improve the transmission efficiency and transmission accuracy.

In a possible implementation manner, the second uplink indication occupies the second downlink resource, and the position of the time domain resource in the second downlink resource is before the position of the time domain resource in the side link resource.

In the above technical solution, in the communication system, control information (such as the first uplink indication, second uplink indication, and sideline indication) is firstly transmitted on the control plane, and then data (such as the second data) is transmitted on the user plane, and the control plane is transmitted. Isolation from the user plane can effectively improve communication efficiency and ensure communication stability.

In a possible implementation manner, the sideline indication includes identification information of sidelink transmission between the first terminal and the second terminal, the second uplink indication includes identification information, and the identification information is used to associate with the sideline The data transmitted on the resource and the data transmitted on the third uplink resource.

In the above technical solution, both the sideline indication and the second uplink indication include the identification information of the sidelink transmission between the first terminal and the second terminal, representing the sideline transmission between the first terminal and the second terminal. The data transmitted in the link and the data transmitted in the uplink between the first terminal and the network device are related, and the first terminal can transmit the data sent on the side link resource to the network device through the third uplink resource. Network equipment, which helps to improve transmission accuracy.

In a possible implementation manner, the first data, the second data, and the third data are all the same, and the first terminal and the second terminal respectively send the same data to the network device, which helps to improve the accuracy of data transmission. Alternatively, the second data and the third data form the first data, the first terminal sends the third data to the network device, and the second terminal sends the second data to the network device, which helps to improve the efficiency of data transmission.

In a second aspect, the present application provides a data transmission method, the method includes: a first terminal sends a resource request to a network device, where the resource request is used to request transmission resources of the first data; the first terminal receives a sideline indication from the network device , the sideline indication is used to indicate the sideline resource, the sideline resource is used for the transmission of second data between the first terminal and the second terminal, and the second data is part or all of the first data.

In a possible implementation manner, the method further includes: the first terminal receives a second uplink indication from the network device, the second uplink indication is used to indicate a third uplink resource, and the third uplink resource is used for the third data to be sent to the first terminal by the first terminal. In the transmission between the device and the network device, the third data is part or all of the first data.

In a possible implementation manner, the first data, the second data, and the third data are all the same, or the second data and the third data form the first data.

In a third aspect, the present application provides a data transmission method, the method includes: a second terminal receives a first uplink indication from a network device, where the first uplink indication is used to indicate a first uplink resource; the second terminal is on the sidelink resource In the case of successfully receiving the second data from the first terminal, the second data is sent to the network device on the first uplink resource.

In a possible implementation manner, the method further includes: the second terminal receives sidelink control information from the first terminal; the sidelink control information indicates identification information of sidelink transmission between the first terminal and the second terminal , the first uplink indication includes identification information, and the identification information is used to associate the data transmitted on the first uplink resource and the data transmitted on the sidelink resource.

In a possible implementation manner, the time domain resources in the first uplink resources are determined by the time domain resources in the sidelink resources and the processing capability of the second terminal.

In a possible implementation manner, the processing capability of the second terminal is used to indicate the first duration, the first duration is the sum of the second duration and the third duration, and the second duration is the decoding performed by the second terminal for transmission on the sideline resources data, the duration of obtaining the second data, the third duration is the duration of encoding the second data by the second terminal to obtain the data transmitted on the first uplink resource; the starting position and side of the time domain resource in the first uplink resource The duration between the termination positions of the temporal resources in the row resources is greater than or equal to the first duration.

In a possible implementation manner, the first uplink indication is further used to indicate the second uplink resource, and the method further includes: the second terminal sends a hybrid automatic retransmission request confirmation to the network device on the second uplink resource, and the hybrid automatic retransmission The request acknowledgment is used to indicate the transmission status of the second data on the sideline resource.

In a fourth aspect, an embodiment of the present application provides a communication device, the device has the function of implementing the network device in the first aspect or any possible implementation manner of the first aspect, and the device may be a network device or Chips included in network equipment.

The apparatus may also have the function of implementing the first terminal in the second aspect or any possible implementation manner of the second aspect, and the apparatus may be the first terminal or a chip included in the first terminal.

The apparatus may also have the function of implementing the second terminal in the third aspect or any possible implementation manner of the third aspect, and the apparatus may be the second terminal, or may be a chip included in the second terminal.

The functions of the above-mentioned apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software may include one or more modules or units or means corresponding to the above-mentioned functions.

In a possible implementation manner, the structure of the apparatus includes a processing module and a communication module, wherein the processing module is configured to support the apparatus to implement the first aspect or the network in any possible implementation manner of the first aspect The corresponding function of the device, or execute the corresponding function of the first terminal in the second aspect or any possible implementation manner of the second aspect, or perform the third aspect or any possible implementation manner of the third aspect. The corresponding function of the second terminal. The communication module is used to support communication between the device and other communication devices, for example, when the device is a network device, it can receive a resource request from the first terminal. The apparatus may also include a storage module coupled with the processing module, which stores necessary program instructions and data of the apparatus. As an example, the processing module may be a processor, the communication module may be a transceiver, and the storage module may be a memory, and the memory may be integrated with the processor, or may be provided separately from the processor.

In another possible implementation manner, the structure of the apparatus includes a processor, and may also include a memory. The processor is coupled to the memory, and can be used to execute computer program instructions stored in the memory, so that the apparatus implements the first aspect or the corresponding function of the network device in any possible implementation manner of the first aspect, or executes the second aspect. Or the corresponding function of the first terminal in any possible implementation manner of the second aspect, or perform the corresponding function of the second terminal in the third aspect or any possible implementation manner of the third aspect.

Optionally, the apparatus further includes a communication interface to which the processor is coupled. When the device is a network device or a terminal, the communication interface may be a transceiver or an input/output interface; when the device is a chip included in a network device or a chip included in a terminal, the communication interface may be an input/output interface of the chip interface. Optionally, the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.

In a fifth aspect, an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor , so that the chip system implements the corresponding functions of the network device in the first aspect or any possible implementation manner of the first aspect, or realizes the first aspect or the first aspect in any possible implementation manner of the second aspect. The corresponding functions of the terminal, or the corresponding functions of the second terminal in the third aspect or any of the possible implementation manners of the third aspect are implemented.

Optionally, the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.

Exemplarily, there may be one or more processors in the system-on-a-chip, and the processors may be implemented by hardware or software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software codes stored in memory.

Exemplarily, the number of memories in the system-on-chip may also be one or more. The memory can be integrated with the processor, or can be provided separately from the processor. Exemplarily, the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is implemented, enables a computer to implement the first aspect or any one of the first aspects. The corresponding function of the network device in this possible implementation, or the corresponding function of the first terminal in the second aspect or any of the possible implementations of the second aspect, or the third aspect or any of the third aspects. Corresponding functions of the second terminal in a possible implementation manner.

In a seventh aspect, an embodiment of the present application provides a computer program product, which, when a computer reads and implements the computer program product, enables the computer to implement the first aspect or the network device in any possible implementation manner of the first aspect Corresponding functions, or realize the corresponding functions of the first terminal in the second aspect or any possible implementation manner of the second aspect, or realize the third aspect or the third aspect in any possible implementation manners of the third aspect. The corresponding functions of the two terminals.

In an eighth aspect, an embodiment of the present application provides a communication system, where the communication system includes a network device having the functions in the first aspect or any possible implementation manner of the first aspect, the second aspect or the second aspect The first terminal with functions in any possible implementation manner, and the second terminal with functions in any possible implementation manner of the third aspect or the third aspect.

For the technical effects that can be achieved in any one of the foregoing second aspect to the eighth aspect, reference may be made to the description of the beneficial effects in the foregoing first aspect, which will not be repeated here.

Description of drawings

1 is a schematic diagram of a communication system architecture provided by the present application;

FIG. 2 is a schematic flowchart of a first method for data transmission of terminal cooperation provided by the present application;

Fig. 3 is the scene schematic diagram of a group of data transmission modes provided by this application;

FIG. 4 is a schematic flowchart of a second terminal cooperative data transmission method provided by the present application;

5 is a schematic structural diagram of a communication device provided by the present application;

FIG. 6 is a schematic structural diagram of still another communication device provided by the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application will be explained, so as to facilitate the understanding of those skilled in the art.

1. A terminal, including a device that provides voice and/or data connectivity to a user, for example, may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal may include user equipment (UE), wireless terminal, mobile terminal, (device-to-device, D2D) terminal, vehicle to everything (V2X) terminal, machine-to-machine/machine-type communication (machine to machine) -to-machine/machine-type communications, M2M/MTC) terminal, Internet of things (IoT) terminal, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user device (user device) )Wait. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal, a portable, pocket-sized, hand-held, computer-embedded mobile device, and the like. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants), PDA), etc. Also includes constrained devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.

As an example and not a limitation, in this embodiment of the present application, the terminal may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminals described above, if located on the vehicle (eg, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminals, and the vehicle-mounted terminal is also called an on-board unit (OBU), for example. The terminal in this embodiment of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units, and the vehicle passes through the built-in on-board module, on-board module , on-board components, on-board chips or on-board units may implement the method of the present application.

2. Network equipment, including, for example, access network (AN) equipment, such as a base station (for example, an access point), may refer to a device in the access network that communicates with a terminal through one or more cells over an air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also be included in the 5G NR system The next generation node B (next generation node B, gNB) may also include the centralized unit (centralized unit, CU) and distributed unit (distributed unit) in the cloud radio access network (cloud radio access network, Cloud RAN) system, DU), the embodiments of the present application are not limited.

3. Sidelink, with the development of wireless communication technology, people's demand for high data rate and user experience is increasing, and at the same time people's demand for proximity services that understand and communicate with surrounding people or things is gradually increasing. Therefore, D2D Technology came into being. The application of D2D technology can reduce the burden of cellular networks, reduce the battery power consumption of the terminal, increase the data rate, and can well meet the needs of proximity services. D2D technology allows multiple D2D-capable terminals to perform direct discovery and direct communication with or without network infrastructure. In view of the characteristics and advantages of D2D technology, the application scenario of the Internet of Vehicles based on D2D technology is proposed. Under the network of Long Term Evolution (LTE) technology proposed by The 3rd Generation Partnership Project (3GPP), vehicle-to-everything (Vehicle-To-Everything, abbreviated as LTE) The Internet of Vehicles technology of V2X) is proposed. The 3GPP standards organization officially released the first-generation LTE V2X standard in early 2017, LTE version number Release 14. In order to meet the needs of a wider range of application scenarios, 5G NR V2X is further studied in the 3GPP standards organization. In the above D2D and V2X technologies, the communication protocol between terminals is called PC5 port, and the corresponding link is called side link (Sidelink, SL for short).

4. Resources, also known as time-frequency resources, include time-domain resources and frequency-domain resources, wherein frequency-domain resources can be one or more resource blocks (resource blocks, RBs), or one or more resource units ( resource element, RE), or one or more carriers (carrier), or one or more bandwidth parts (BWP), etc. The time domain resource may be one or more subframes, or one or more time slots, or one or more symbols on one or more time slots, or the like.

5. Uu interface, Uu interface in English, refers to the communication interface between the terminal and the network device.

The channel types defined in the Uu interface include physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH), where PUSCH is used for the terminal to send uplink data to the network device, and PUCCH is used for The terminal sends uplink control information to the network device.

6. PC5 interface, PC5interface in English, refers to the communication interface between terminals.

The channel types defined in the PC5 interface include PSSCH (physical sidelink share channel, physical bypass shared channel), PSCCH (physical sidelink control channel, physical bypass control channel) and physical sidelink feedback channel (Physical Sidelink Feedback Channel, PSFCH) , where PSSCH is used for sending sideline data between terminals and terminals, PSCCH is used for sending sideline control information between terminals and terminals, and the physical sideline feedback channel PSFCH is used for sending hybrid automatic repeat request acknowledgements between terminals and terminals ( hybrid automatic repeat request-acknowledgement, HARQ-ACK) information.

Seven, L1 layer, Layer 1, refers to the physical layer in the protocol stack.

8. The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c may be single or multiple .

The method provided in this application can be applied to various communication systems, for example, it can be a 5G new radio (new radio, NR) system, and a new communication system that will appear in future communication development.

As shown in FIG. 1, a communication system is exemplarily provided for this application, wherein a network device and two terminals (represented by terminal 1 and terminal 2 respectively) form a single-cell communication system, and terminal 1 and terminal 2 can transmit the data separately or simultaneously The uplink data is sent to the network device, the network device can send the downlink data to the terminal 1 and the terminal 2 separately or simultaneously, and the terminal 1 and the terminal 2 can also send sideline data to each other.

It should be understood that FIG. 1 is only an exemplary illustration, and does not specifically limit the number of terminals included in the communication system, the number of network devices, and the number of cells covered by the network devices.

In view of the problems of complex process and long delay in the process of network equipment scheduling terminal cooperative transmission in the prior art, the interaction process is simplified and the scheduling delay is reduced. The present application exemplarily provides a data transmission method. Before the first terminal and the second terminal transmit sidelink data, the network device can allocate uplink resources to the second terminal respectively, so as to simplify the interaction process in the process of scheduling terminal coordinated transmission by the network device. , reducing the scheduling delay.

Specifically, in the data transmission method for terminal cooperation provided by the present application, when the first terminal needs to send a certain data packet to the network device, due to the limited data transmission capability of the first terminal, the first terminal may, based on the assistance of the second terminal, Send the packet to the network device. For convenience of description, the data packet may be referred to as the first data. In this method, the first terminal may first send second data to the second terminal, where the second data may be part or all of the first data. Then the first terminal sends the third data to the network device, and the second terminal sends the second data to the network device. The third data may be part or all of the first data, so as to complete the cooperative transmission. Exemplarily, the first terminal and the second terminal may be terminal 1 and terminal 2 as shown in FIG. 1 .

Of course, in this application, the first terminal may be referred to as a transmitting terminal, a transmitting end, a Tx UE, etc., and the second terminal may also be referred to as a receiving terminal, a receiving end, an Rx UE, and the like. In addition, the first terminal, as the source of the first data, may also be referred to as a source terminal (source UE, SUE), and the second terminal, as a collaborator of the first terminal, may also be referred to as a cooperative terminal (cooperative UE, CUE) .

Based on the above introduction, FIG. 2 is a schematic flowchart of a data transmission method for terminal cooperation provided by the present application as an example, in the process:

Step 201, the first terminal sends a resource request to a network device.

The resource request is used to request transmission resources of the first data.

In an optional implementation manner, the transmission resources of the first data include any one or more of the following: sidelink resources, first uplink resources, and third uplink resources. Correspondingly, the resource request is used to request any one or more of the following from the network device: side-link resources, first uplink resources and third uplink resources.

The sideline resources are used for transmitting the second data between the first terminal and the second terminal, or in other words, the sideline resources are used for the first terminal to send the second data to the second terminal, and/or the second terminal receives data from the second terminal. second data of a terminal.

The first uplink resource is used for transmitting the second data between the second terminal and the network device, or in other words, the first uplink resource is used for the second terminal to send the second data to the network device, and/or the network device receives data from the second terminal the second data.

The third uplink resource is used for transmitting third data between the first terminal and the network device, or in other words, the third uplink resource is used for the first terminal to send third data to the network device, and/or the network device receives data from the first terminal the third data.

In an optional implementation manner, the resource request includes the data volume of the first data, and the network device may determine any one of the sideline resource, the first uplink resource, and the third uplink resource according to the data volume of the first data in the resource request. one or more.

As shown in FIG. 3 , an achievable scenario in which the second terminal assists the first terminal to send the first data to the network device is exemplarily provided by the present application. Specifically, in scenario 1, the second data is a part of the first data, and the third data is another part of the first data, that is, the second data and the third data form the first data. In this manner, the second terminal and the first terminal respectively send different parts of the first data, which helps to improve the efficiency of transmitting the first data.

In scenario 2, the second data is the entirety of the first data, and the third data is also the entirety of the first data, that is, the first data, the second data, and the third data are the same. In this manner, the second terminal and the first terminal respectively send the first data, which helps to improve the accuracy of transmitting the first data.

In scenario 3, the first data is the same as the second data, the first terminal can establish a sidelink connection with the second terminal, but cannot establish an uplink connection with the network device, and the first terminal can send the second data to The second terminal, and then the second terminal sends the second data to the network device. In this manner, the first terminal can send data to the network device by means of the second terminal. It should be understood that in this transmission manner, the first terminal will not send the third data to the network device.

Referring to the three scenarios shown in FIG. 3 , the network device determines any one or more of the lateral resource, the first uplink resource and the third uplink resource according to the data volume of the first data in the resource request, at least as follows Example:

In scenario 1, the network device may determine the data volume of the first data and the uplink channel status of the first terminal, the uplink channel status of the second terminal, and the side channel status between the first terminal and the second terminal to determine The data volume of the second data and the data volume of the third data, and then determine the sideline resource according to the data volume of the second data, and determine the first uplink resource and the third data volume respectively according to the data volume of the second data and the third data. Three uplink resources.

In scenario 2, the network device may separately determine the side-link resource, the first uplink resource and the third uplink resource according to the data volume of the first data.

In scenario 3, the network device may determine the side link resource and the first uplink resource according to the data volume of the first data.

In addition, when determining the first uplink resource, the network device needs to ensure that the second terminal completes the processing of the second data. The process of processing and completing the second data by the second terminal is explained here first: the second terminal needs to decode/decode the data received on the sideline resource to obtain the second data. The second terminal also needs to transmit the second data on the first uplink resource after encoding the second data.

The duration used for decoding/decoding by the second terminal may be referred to as the second duration or PSSCH decoding time, the duration used for encoding by the second terminal may be referred to as the third duration or PUSCH encoding time, the second duration and the third duration The sum of the durations is the duration required for the second terminal to process and complete the second data, which may be referred to as the first duration.

In an optional implementation manner, the network device may determine the first uplink time domain resources in the first uplink resources according to the sidelink time domain resources in the sidelink resources and the processing capability of the second terminal. Specifically, the network device may determine the second duration and the third duration according to the processing capability of the terminal, and then determine the first duration, and then the network device determines the first uplink time domain resources according to the first duration and the sidebound time domain resources, wherein the first duration The duration between the start position of an uplink time domain resource and the end position of the sidelink time domain resource is greater than or equal to the first duration.

The processing capability of the second terminal may be obtained by the network device through the terminal capability reporting process. In the terminal capability reporting process, the second terminal may report the PSSCH decoding capability and the PUSCH encoding capability to the network device.

In addition, the network device may also determine a second uplink resource, where the second uplink resource is used by the second terminal to send the HARQ-ACK information to the network device, for details, please refer to the description in step 205 below.

Exemplarily, the resource request may specifically be a buffer state report (buffer state report, BSR). Specifically, the first terminal first sends an uplink scheduling request (SR) to the network device, and correspondingly, the network device sends downlink control information (DCI) to the first terminal, where the DCI is used to indicate the first terminal Uplink resource for sending BSR. The first terminal sends a BSR to the network device on the requested uplink resource.

Step 202, the network device sends a sideline indication to the first terminal.

The sideline indication is used to indicate sideline resources. Correspondingly, the first terminal receives the sideline indication from the network device, and determines the sideline resource for sending the second data to the second terminal according to the sideline indication. Sidelink resources include sidelink time domain resources and sidelink frequency domain resources.

Exemplarily, the sidelink indication may specifically be a sidelink grant (Sidelink grant, SL grant).

Step 203, the network device sends the first uplink indication to the second terminal.

The first uplink indication is used to indicate the first uplink resource. Correspondingly, the second terminal receives the first uplink indication from the network device, and determines the first uplink resource according to the first uplink indication.

The first uplink indication occupies first downlink resources, and the first downlink resources include first downlink time domain resources and first downlink frequency domain resources. In an optional implementation manner, the network device may send the first uplink indication to the second terminal before the first terminal sends the second data to the second terminal, that is, the location of the first downlink time domain resource is on the side. before the location of the time domain resource. In this method, in the communication system, control information (such as the first uplink indication and sideline indication) is first transmitted on the control plane, and then data (such as the second data) is transmitted on the user plane to isolate the control plane from the user plane. , which can effectively improve the communication efficiency and ensure the stability of the communication.

Step 204, the first terminal sends the second data to the second terminal on the sideline resource.

Optionally, the first terminal sends sideline control information (also referred to as PSCCH) associated with the second data to the second terminal, where the sideline control information is associated with the second data and is used to indicate that the second terminal is carried. Correspondingly, the second terminal may determine the position of the sideline resource according to the sideline control information, and then receive the second data from the first terminal on the sideline resource.

In an optional manner, the first terminal may send second data to the second terminal based on a transport block (TB), the second data may include at least one TB, and each TB includes at least one coding block group (code). block group, CBG). For example, the first terminal determines that the second data includes 3 TBs, and the first terminal sends the 3 TBs to the second terminal on the sideline resource. If one of the TBs is not successfully received by the second terminal, the first terminal can retransmit this one TB without retransmitting other successfully received TBs.

In yet another optional manner, the first terminal may also send second data to the second terminal based on the CBG, where the second data may include at least one CBG. For example, the first terminal determines that the second data includes 3 CBGs, and the first terminal sends the 3 CBGs to the second terminal on the sideline resource. If one of the CBGs is not successfully received by the second terminal, the first terminal can retransmit This one CBG does not need to retransmit other successfully received CBGs.

Step 205, the second terminal sends the second data to the network device on the first uplink resource.

In an optional implementation manner, the second terminal may determine the receiving state of receiving the second data according to the data received on the sideline resource. The receiving state of the second terminal is, for example, receiving the second data correctly, not receiving the second data correctly, receiving part of the second data correctly, and the like. The receiving state in which the second terminal receives the second data may also be understood as the transmission state of the second data on the sideline resource.

Specifically, when the first terminal sends the second data to the second terminal based on the TB, the second terminal determines whether each TB is correctly received, and sends the correctly received TB to the network device. Exemplarily, the second data may be a TB, and if the second terminal correctly receives the TB, the second terminal sends the TB (ie, the second data) to the network device.

In the case where the first terminal sends the second data to the second terminal based on the CBG, the second terminal determines whether each CBG is correctly received, and sends the correctly received CBG to the network device, or the correctly received CBG is formed into a TB and then sent to the network device. Network equipment. Exemplarily, the second data may be a TB, and the TB includes multiple CBGs, and if the second terminal correctly receives one of the CBGs, the second terminal may send the one of the CBGs to the network device. Or the second terminal may send the TB (ie the second data) to the network device after determining that all CBGs in the TB are successfully received.

In this embodiment of the present application, the network device may fail to receive all or part of the second data, for example, fails to receive fourth data, where the fourth data is all or part of the second data. Exemplarily, if the second terminal sends the second data to the network device based on the TB, the fourth data may be one or more TBs; if the second terminal sends the second data to the network device based on the CBG, the fourth data may be One or more CBGs.

In scenario 2 shown in FIG. 3 , the data sent by the first terminal to the network device is the same as the data sent by the second terminal to the network device. When the network device fails to receive the fourth data from the second terminal, the network device may determine whether to schedule retransmission of the fourth data according to the received data from the first terminal.

Further, when the network device schedules the retransmission of the fourth data, it may specifically be the method (1) and/or the method (2), wherein the method (1) is that the network device schedules the first terminal to retransmit the fourth data to the second terminal. data, and schedule the second terminal to retransmit the fourth data to the network device; mode (2) is that the network device schedules the first terminal to retransmit the fourth data to the network device. The explanation is explained in conjunction with the following examples (1) to (6).

In the case of TB-based transmission between the network device and the second terminal, the first uplink indication is used to schedule 2 TBs. Further, the second data consists of 2 TBs (represented as TB1 and TB2 respectively).

Example (1), the network device successfully receives TB1 from the second terminal, but fails to receive TB2 from the second terminal (TB2 is the fourth data). The network device successfully receives TB1 and TB2 from the first terminal. Then the network device can determine that TB1 and TB2 are successfully received without scheduling retransmission of the TB2.

Example (2), the network device successfully receives TB1 from the second terminal, but fails to receive TB2 from the second terminal (TB2 is the fourth data). The network device fails to receive the TB1 from the first terminal successfully, and successfully receives the TB2 from the first terminal. Then the network device can determine that TB1 and TB2 are successfully received without scheduling retransmission of the TB2.

Example (3), the network device successfully receives TB1 from the second terminal, but fails to receive TB2 from the second terminal (TB2 is the fourth data). The network device successfully receives the TB1 from the first terminal, and fails to receive the TB2 from the first terminal. Then the network device may determine that TB2 is not received successfully, so as to schedule the first terminal to retransmit TB2 to the second terminal, schedule the second terminal to retransmit TB2 to the network device, and/or schedule the first terminal to retransmit TB2 to the network device.

In the case that the network device and the second terminal transmit based on CBG, the first uplink indication is used to schedule 1 TB. Further, the second data consists of 1 TB, and the 1 TB includes 2 CBGs (represented as CBG1 and CBG2 respectively).

Example (4), the network device successfully receives CBG1 from the second terminal, but fails to receive CBG2 from the second terminal (CBG2 is the fourth data). The network device successfully receives CBG1 and CBG2 from the first terminal. Then the network device can determine that CBG1 and CBG2 are successfully received, and there is no need to schedule and retransmit the CBG2.

Example (5), the network device successfully receives the CBG1 from the second terminal, but fails to receive the CBG2 from the second terminal (CBG2 is the fourth data). The network device fails to receive the CBG1 from the first terminal successfully, and successfully receives the CBG2 from the first terminal. Then the network device can determine that CBG1 and CBG2 are successfully received, and there is no need to schedule and retransmit the CBG2.

Example (6), the network device successfully receives the CBG1 from the second terminal, but fails to receive the CBG2 from the second terminal (CBG2 is the fourth data). The network device fails to receive the CBG1 from the first terminal, and fails to receive the CBG2 from the first terminal. Then the network device can determine that the CBG2 is not received successfully, so as to schedule the first terminal to retransmit CBG2 to the second terminal, schedule the second terminal to retransmit CBG2 to the network device, and/or schedule the first terminal to retransmit CBG2 to the network device.

In scenario 1 shown in FIG. 3 , the data sent by the first terminal to the network device is different from the data sent by the second terminal to the network device, while in scenario 3 shown in FIG. 3 , the first terminal does not send data to the network device In the two scenarios, when the network device fails to receive the fourth data from the second terminal, the network device needs to schedule the first terminal to retransmit the fourth data to the second terminal, and schedule the second terminal to retransmit the fourth data. The terminal retransmits the fourth data to the network device.

In the case of TB-based transmission, the first uplink indication is used to schedule 2 TBs. Further, the second data consists of 2 TBs (represented as TB1 and TB2, respectively). Exemplarily, the network device successfully receives TB1 from the second terminal, but fails to receive TB2 from the second terminal (TB2 is the fourth data). Then the network device schedules the first terminal to retransmit TB2 to the second terminal, and schedules the second terminal to retransmit TB2 to the network device.

In the case of CBG-based transmission, the first uplink indication is used to schedule 1 TB. Further, the second data consists of 1 TB, and the 1 TB includes 2 CBGs (represented as CBG1 and CBG2 respectively). Exemplarily, the network device successfully receives CBG1 from the second terminal, but fails to receive CBG2 from the second terminal (CBG2 is the fourth data). Then, the network device schedules the first terminal to retransmit CBG2 to the second terminal, and schedules the second terminal to retransmit CBG2 to the network device.

It should be supplemented that the second terminal may also feed back HARQ-ACK information to the network device according to the receiving state of the second data. The HARQ-ACK information is carried in the second uplink resource, and the second uplink resource may be indicated by the first uplink indication. Exemplarily, the HARQ-ACK information may be uplink control information carried on the second uplink resource can also be carried in the uplink data on the second uplink resource.

In this application, the HARQ-ACK information may have two modes: Mode 1, which may be referred to as acknowledgement (acknowledgement, ACK)/negative acknowledgement (negative acknowledgement, NACK) feedback, and the HARQ-ACK information includes NACK and ACK. Exemplarily, if the second terminal fails to receive the sideline data successfully, a NACK is sent to the network device. If the second terminal successfully receives the sideline data, it sends an ACK to the network device.

Mode 2 can be called NACK only feedback, and the HARQ-ACK information includes NACK. Exemplarily, if the second terminal fails to receive the sideline data successfully, a NACK is sent to the network device. If the second terminal successfully receives the sideline data, it does not feed back to the network device.

Based on the transmission granularity of data transmission between the first terminal and the second terminal and the feedback mode of the HARQ-ACK information, the HARQ-ACK information sent by the second terminal to the network device may have the following example.

Example 1, in TB-based ACK/NACK feedback, for each TB, if the second terminal receives the TB correctly, it feeds back an ACK to the network device, and if the second terminal does not receive the TB correctly, it feeds back to the network device NACK.

Example 2, based on the NACK only feedback of a TB, for each TB, if the second terminal receives the TB correctly, it will not feed back to the network device, and if the second terminal does not receive the TB correctly, it will feed back NACK to the network device .

Example 3, in CBG-based ACK/NACK feedback, for each CBG, if the second terminal receives the CBG correctly, it feeds back an ACK to the network device, and if the second terminal does not receive the CBG correctly, it feeds back to the network device NACK.

Example 4, in the CBG-based NACK only feedback, for each CBG, if the second terminal receives the CBG correctly, it will not feed back to the network device, and if the second terminal does not receive the CBG correctly, it will feed back NACK to the network device .

In the above examples 1 to 4, the network device may determine whether to schedule the first terminal to retransmit to the second terminal according to the transmission granularity of data transmission between the first terminal and the second terminal and the feedback situation of the second terminal. The following examples illustrate:

In a specific example, when the first terminal and the second terminal transmit based on TB, the side row indication is used to schedule 2 TBs. Further, the second data consists of 2 TBs (represented as TB1 and TB2 respectively). The second terminal successfully receives the TB1 from the first terminal, but fails to receive the TB2 from the first terminal. In the ACK/NACK feedback, the second terminal may send the ACK corresponding to the TB1 and the NACK corresponding to the TB2 to the network device; or in the NACK only feedback, the second terminal may send the NACK corresponding to the TB2 to the network device.

For TB2, the network device receives the NACK corresponding to the TB2 from the second terminal, schedules the first terminal to retransmit TB2 to the second terminal, and schedules the second terminal to retransmit TB2 to the network device.

For TB1, in the ACK/NACK feedback, the network device receives the ACK corresponding to the TB1 from the second terminal, or in the NACK only feedback, the network device does not receive the NACK corresponding to the TB1 from the second terminal, then determine the second terminal. The terminal has successfully received TB1 from the first terminal. If the network device fails to receive the TB1 from the second terminal, the second terminal may be scheduled to retransmit the TB1 to the network device.

In another specific example, when the first terminal and the second terminal transmit based on CBG, the side row indication is used to schedule 1 TB. Further, the second data is 1 TB, and the TB includes 2 CBGs (represented as CBG1 and CBG2 respectively). The second terminal successfully receives the CBG1 from the first terminal, but fails to receive the CBG2 from the first terminal. In the ACK/NACK feedback, the second terminal may send the ACK corresponding to the CBG1 and the NACK corresponding to the CBG2 to the network device, or in the NACK only feedback, the second terminal may send the NACK corresponding to the CBG2 to the network device.

For CBG2, the network device receives the NACK corresponding to the CBG2 from the second terminal, schedules the first terminal to retransmit CBG2 to the second terminal, and schedules the second terminal to retransmit CBG2 to the network device.

For CBG1, in the ACK/NACK feedback, the network device receives the ACK corresponding to the CBG1 from the second terminal, or in the NACK only feedback, the network device does not receive the NACK corresponding to the CBG1 from the second terminal, then determine the second terminal. The terminal has successfully received the CBG1 from the first terminal. If the network device fails to receive the CBG1 from the second terminal, the second terminal may be scheduled to retransmit the CBG1 to the network device.

That is, in the embodiment of this application, if the network device does not receive all or part of the second data from the second terminal, it can determine how to The first terminal and/or the second terminal are scheduled to retransmit all or part of the second data, so as to improve the efficiency of terminal cooperative transmission.

Step 206, the network device sends a second uplink indication to the first terminal.

The second uplink indication is used to indicate the location of the third uplink resource. Correspondingly, the first terminal receives the second uplink indication from the network device, and determines the third uplink resource according to the second uplink indication.

The second uplink indication occupies second downlink resources, and the second downlink resources include second downlink time domain resources and second downlink frequency domain resources. In an optional implementation manner, the network device may send the second uplink indication to the first terminal before the first terminal sends the second data to the second terminal, that is, the location of the first downlink time domain resource is on the side. before the location of the time domain resource. In this method, the communication system first transmits control information (such as the first uplink indication, the second uplink indication, and the sideline indication) on the control plane, and then transmits data (such as the second data) on the user plane. The isolation of the user plane can effectively improve the communication efficiency and ensure the stability of the communication.

Step 207, the first terminal sends third data to the network device on the third uplink resource.

In this application, the sequence of step 203 and step 206 is not limited, and similarly, the sequence of step 205 and step 207 is not limited.

It needs to be supplemented that the first uplink indication sent by the network device to the second terminal and the second uplink indication sent to the first terminal may be carried in the same signaling, or may be carried in different signaling. Exemplarily, the piece of signaling or different signaling may be sent dynamically or semi-statically.

In an optional manner, the first uplink indication and the second uplink indication may be carried in the same signaling, and the signaling may be sent by the network device to the first terminal and the second terminal in a multicast manner, or by unicast to the first terminal, and unicast to the second terminal.

Exemplarily, the signaling includes two uplink indications, the two uplink indications are a first uplink indication and a second uplink indication respectively, the first uplink indication is used for the second terminal to determine the first uplink resource, and the second uplink indication is used for determining the first uplink resource. The indication is used by the first terminal to determine the third uplink resource.

In another example, the signaling includes an uplink indication, which is equivalent to saying that the one uplink indication can be both a first uplink indication and a second uplink indication, and the uplink indication is used by the second terminal to determine the first uplink indication. resource, and is used by the first terminal to determine the third uplink resource.

The first uplink resource and the third uplink resource are the same or different.

In another optional manner, the first uplink indication and the second uplink indication may be carried in different signaling, which is equivalent to that the network device may send the first signaling to the second terminal in a unicast manner, wherein the first signaling The command includes a first uplink indication, and the first uplink indication is used for the second terminal to determine the first uplink resource. The network device may also send the second signaling to the first terminal in a unicast manner, where the second signaling includes a second uplink indication, and the second uplink indication is used by the first terminal to determine the third uplink resource. The first uplink resource and the third uplink resource are the same or different.

Exemplarily, the first uplink indication and the second uplink indication may be collectively referred to as an uplink indication, and the uplink indication may specifically be a Uu interface grant (Uu grant).

In addition, this application does not exclude the implementation of carrying the sideline indication and the second uplink indication in the same signaling, that is, the sideline indication and the second uplink indication are carried in the same signaling, or the sideline indication, the first The uplink indication and the second uplink indication are carried in the same signaling.

It should also be noted that the network device determines that the location of the time domain resource in the third uplink resource is after the location of the sideline time domain resource. In a specific implementation, after the first terminal sends the second data to the second terminal, the first The terminal can send the third data to the network device, which helps ensure that the network device receives the second data from the second terminal and receives the third data from the first terminal, thereby improving the success rate of the network device in determining the first data.

In the above technical solution, the first terminal sends a resource request to the network device, where the resource request is used to request transmission resources of the first data. The network device determines, according to the resource request, a sideline resource for transmitting second data and a first uplink resource for transmitting second data, where the second data is all or part of the first data. The network device sends a sidelink indication for indicating the sidelink resource to the first terminal, and sends a first uplink indication for indicating the first uplink resource to the second terminal. The network device can allocate the first uplink resource to the second terminal without waiting for the first terminal to successfully send the second data to the second terminal. In the process of terminal cooperative transmission, it helps to simplify the interaction process and reduce the scheduling delay.

In addition, it also needs to be added that the second terminal can only associate the sidelink data in the sidelink with the uplink data in the uplink, so that the sidelink data received from the sidelink can be transmitted through the uplink. The link is sent to the network device. The implementation manner of the second terminal associating sideline data and uplink data is described as follows:

In an optional manner, the sidelink indication includes a transmission identifier of the sidelink between the first terminal and the second terminal, and the first uplink indication also includes the transmission identifier. After receiving the sideline instruction, the first terminal will carry the transmission identifier in the sideline instruction together with the sideline control information and send it to the second terminal, that is, the second terminal can determine the distance between the first terminal and the second terminal. A transmission identifier for transmitting the second data. Further, the second terminal may, according to the transmission identifier in the first uplink indication, determine that the first uplink resource corresponding to the first uplink indication is used to transmit the second data, and then send the second data through the first uplink resource. to the network device.

Optionally, the first terminal may also associate the sidelink data in the sidelink with the uplink data of the uplink. The transmission identifier may also be included in the second uplink indication. After receiving the sideline indication, the first terminal determines a transmission identifier for transmitting the second data with the second terminal. Further, according to the transmission identifier in the second uplink indication, the second terminal determines that the third uplink resource corresponding to the second uplink indication is used to transmit the second data, and then transmits the second data through the third uplink resource. sent to the network device.

Exemplarily, the above-mentioned transmission identifier may specifically be an SL HARQ ID.

In another optional manner, the first uplink indication may not include the transmission identifier, and the second terminal may send the sidelink data received from the sidelink at the latest moment to the network device through the uplink. Correspondingly, the transmission identifier may not be included in the second uplink indication, and the first terminal may send the sidelink data sent through the sidelink at the latest moment to the network device through the uplink.

It should be noted that the first terminal associates the uplink data in the uplink with the sidelink data in the sidelink, which is mainly applicable to the case where the first data, the second data and the third data are the same, that is, it is applicable to In scene 2 of Figure 3.

Figure 4 is a schematic flowchart of another data transmission method provided by the application, in this process:

Step 401, the first terminal sends a resource request to a network device.

Step 402, the network device sends a sideline indication to the first terminal. The sideline indication is used to indicate sideline resources.

Step 403, the network device sends an uplink indication to the first terminal and the second terminal respectively.

In one case, the uplink indication includes a first uplink indication and a second uplink indication, wherein the first uplink indication is used to indicate the first uplink resource and the second uplink resource, and the second uplink indication is used to indicate the third uplink resource.

In another case, the uplink indication is used to indicate the first uplink resource, the second uplink resource and the third uplink resource.

Step 404, the first terminal sends the second data to the second terminal on the sideline resource indicated by the network device.

Step 405, the second terminal sends the second data and/or HARQ ACK information to the network device. Specifically, the second terminal may send the second data to the network device on the first uplink resource, and/or the second terminal may send HARQ ACK information to the network device on the second uplink resource.

Step 406, the first terminal sends third data to the network device on the third uplink resource.

For the specific implementation manner of the above steps 401 to 406, reference may be made to the description in the related embodiment of FIG. 2 .

The various embodiments described herein may be independent solutions, or may be combined according to internal logic, and these solutions all fall within the protection scope of the present application.

It can be understood that, in the above method embodiments, the methods and operations implemented by the terminal may also be implemented by components (such as chips or circuits) that can be used in the terminal, and the methods and operations implemented by the network device may also be implemented by the terminal. A component (eg, chip or circuit) implementation of a network device.

In the above embodiments provided by the present application, the methods provided by the embodiments of the present application are respectively introduced from the perspective of interaction between various devices. In order to implement the functions in the methods provided by the above embodiments of the present application, the terminal and the network device may include hardware structures and/or software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into one processor, or may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

Based on the above content and the same concept, FIG. 5 and FIG. 6 are schematic structural diagrams of possible communication apparatuses provided by the present application. These communication apparatuses can be used to implement the functions of the network device, or the first terminal, or the second terminal in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

In this application, the communication device may be terminal 1 or terminal 2 as shown in FIG. 1 , may also be a network device as shown in FIG. 1 , or may be a module (such as a chip) applied to a terminal or network device.

As shown in FIG. 5 , the communication apparatus includes a processing module 501 and a communication module 502 , wherein the communication module 502 may further include a sending module 5021 and a receiving module 5022 . The communication apparatus is configured to implement the functions of the network device, or the first terminal, or the second terminal in the foregoing method embodiments.

When the communication apparatus is used to implement the function of the network device in the above method embodiment:

In a possible implementation manner, the processing module 501 is used to control the receiving module 5022 to receive a resource request from the first terminal, and the resource request is used to request transmission resources of the first data; the control sending module 5021 sends a sideline to the first terminal. indication, the sideline indication is used to indicate the sideline resource, the sideline resource is used for the transmission of the second data between the first terminal and the second terminal, and the second data is part or all of the first data; the control sending module 5021 sends The second terminal sends the first uplink indication, where the first uplink indication is used to indicate the first uplink resource, and the first uplink resource is used for the transmission of the second data between the second terminal and the device.

In a possible implementation manner, the sideline indication includes identification information of the sidelink transmission between the first terminal and the second terminal, the first uplink indication includes identification information, and the identification information is used to associate with the first uplink. Data transmitted on resources and data transmitted on sideline resources.

In a possible implementation manner, the processing capability of the second terminal is used to indicate the first duration, the first duration is the sum of the second duration and the third duration, and the second duration is decoded by the second terminal and transmitted on the sideline resource. data, the duration of obtaining the second data, and the third duration is the duration of encoding the second data by the second terminal to obtain the data transmitted on the first uplink resource; the starting position and side row of the time domain resource in the first uplink resource The duration between the termination positions of the temporal resources in the resources is greater than or equal to the first duration.

In a possible implementation manner, the first uplink indication is also used to indicate the second uplink resource, and the second uplink resource is used for the hybrid automatic repeat request confirmation between the transmission device and the second terminal, and the hybrid automatic repeat request confirmation is used for the confirmation. for indicating the transmission status of the second data on the sideline resource.

In a possible implementation manner, the processing module 501 is further configured to control the sending module 5021 to send a second uplink indication to the first terminal, the second uplink indication is used to indicate the third uplink resource, and the third uplink resource is used for the third data. In the transmission between the first terminal and the device, the third data is part or all of the first data.

In a possible implementation manner, the sideline indication includes identification information of the sidelink transmission between the first terminal and the second terminal, the second uplink indication includes identification information, and the identification information is used to associate with the sideline resource. The data transmitted on the uplink and the data transmitted on the third uplink resource.

When the communication device is used to implement the function of the first terminal in the above method embodiment:

In a possible implementation manner, the processing module 501 is used to control the sending module 5021 to send a resource request to the network device, and the resource request is used to request the transmission resource of the first data; the control receiving module 5022 receives the sideline indication from the network device, The sideline indication is used to indicate a sideline resource, and the sideline resource is used for the transmission of second data between the device and the second terminal, and the second data is part or all of the first data.

In a possible implementation manner, the processing module 501 is used to control the receiving module 5022 to receive a second uplink indication from the network device, the second uplink indication is used to indicate the third uplink resource, and the third uplink resource is used for the third data in the In the transmission between the device and the network device, the third data is part or all of the first data.

In a possible implementation manner, the sideline indication includes identification information of sidelink transmission between the device and the second terminal, the second uplink indication includes identification information, and the identification information is used to associate and transmit on the sideline resource. data and data transmitted on the third uplink resource.

When the communication device is used to implement the function of the second terminal in the above method embodiment:

In a possible implementation manner, the processing module 501 is used to control the receiving module 5022 to receive the first uplink indication from the network device, and the first uplink indication is used to indicate the first uplink resource; the receiving module 5022 succeeds in the sidelink resource. In the case of receiving the second data from the first terminal, the sending module 5021 is controlled to send the second data to the network device on the first uplink resource.

In a possible implementation manner, the processing module 501 is further configured to control the receiving module 5022 to receive sideline control information from the first terminal; the sideline control information indicates the identifier of the sidelink transmission between the first terminal and the device. information, the first uplink indication includes identification information, and the identification information is used to associate the data transmitted on the first uplink resource and the data transmitted on the sidelink resource.

In a possible implementation manner, the time domain resources in the first uplink resources are determined by the time domain resources in the sidelink resources and the processing capability of the processing module 501 .

In a possible implementation manner, the processing capability of the processing module 501 is used to indicate the first duration, the first duration is the sum of the second duration and the third duration, and the second duration is decoded by the processing module 501 and transmitted on the sideline resource. data, the duration of obtaining the second data, and the third duration is the duration of encoding the second data by the processing module 501 to obtain the duration of the data transmitted on the first uplink resource; the starting position and side row of the time domain resource in the first uplink resource The duration between the termination positions of the temporal resources in the resources is greater than or equal to the first duration.

In a possible implementation manner, the first uplink indication is also used to indicate the second uplink resource, and the processing module 501 is also used to control the sending module 5021 to send a hybrid automatic repeat request confirmation to the network device on the second uplink resource, and the mixed The automatic retransmission request acknowledgement is used to indicate the transmission status of the second data on the sideline resource.

FIG. 6 shows an apparatus 600 provided by an embodiment of the present application, and the apparatus shown in FIG. 6 may be an implementation manner of a hardware circuit of the apparatus shown in FIG. 5 . The apparatus can be applied to the flow chart shown above to implement the functions of the network device, or the first terminal, or the second terminal in the foregoing method embodiments.

For ease of illustration, FIG. 6 shows only the main components of the device.

The apparatus 600 shown in FIG. 6 includes a communication interface 610, a processor 620, and a memory 630, wherein the memory 630 is used to store program instructions and/or data. The processor 620 may cooperate with the memory 630 . Processor 620 may execute program instructions stored in memory 630 . When the instructions or programs stored in the memory 630 are executed, the processor 620 is configured to perform the operations performed by the processing module 501 in the above embodiments, and the communication interface 610 is configured to perform operations performed by the communication module 502 in the above embodiments.

Memory 630 is coupled to processor 620 . The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. At least one of the memories 630 may be included in the processor 620 .

In this embodiment of the present application, the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces. In this embodiment of the present application, when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; it may also be a transceiver integrating a transceiver function, or a communication interface.

The apparatus 600 may also include a communication line 640 . Wherein, the communication interface 610, the processor 620 and the memory 630 can be connected to each other through a communication line 640; the communication line 640 can be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (extended industry standard architecture). , referred to as EISA) bus and so on. The communication line 640 can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 6, but it does not mean that there is only one bus or one type of bus. It can be understood that, the various numbers and numbers involved in the embodiments of the present application are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the sequence numbers of the above processes does not imply the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic.

Based on the above content and the same concept, an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is processed by the When the device is executed, the chip system enables the function of the network device, or the first terminal, or the second terminal in the foregoing method embodiments.

The system-on-a-chip may include interface circuitry for interacting code instructions to the processor.

It should be understood that there may be one or more processors in the chip system, and the processors may be implemented by hardware or software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software codes stored in memory.

It should be understood that there may also be one or more memories in the chip system. The memory can be integrated with the processor, or can be provided separately from the processor. Exemplarily, the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.

Based on the above content and the same concept, the embodiments of the present application provide a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is implemented, enables the computer to implement the network device, or the function of the first terminal or the second terminal.

Based on the above content and the same concept, the embodiments of the present application provide a computer program product, which, when a computer reads and implements the computer program product, enables the computer to implement the network device, or the first terminal, or the second terminal in the above method embodiments. function of the terminal.

Based on the above content and the same concept, an embodiment of the present application provides a communication system. The communication system may include the first terminal, the second terminal, and the network device in the above method embodiments, and of course may also include other communication devices. This application does not Do limit.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A data transmission method, comprising:

The network device receives a resource request from the first terminal, where the resource request is used to request transmission resources of the first data;

The network device sends a sideline indication to the first terminal, where the sideline indication is used to indicate a sideline resource, and the sideline resource is used for the second data to be transmitted between the first terminal and the second terminal. The second data is part or all of the first data;

The network device sends a first uplink indication to the second terminal, where the first uplink indication is used to indicate a first uplink resource, and the first uplink resource is used for the second data between the second terminal and the Transmission between network devices.
The method of claim 1, wherein the first uplink indication occupies a first downlink resource, and the position of the time domain resource in the first downlink resource is in the time domain of the side link resource before the location of the resource.
The method of claim 1, wherein the sidelink indication includes identification information of sidelink transmission between the first terminal and the second terminal, and the first uplink indication includes The identification information is included, where the identification information is used to associate the data transmitted on the first uplink resource and the data transmitted on the sidelink resource.
The method of claim 1, wherein the time domain resources in the first uplink resources are determined by the time domain resources in the sidelink resources and the processing capability of the second terminal.
The method of claim 4, wherein the processing capability of the second terminal is used to indicate a first duration, the first duration is the sum of the second duration and the third duration, and the second duration is The second terminal decodes the data transmitted on the sideline resource to obtain the duration of the second data, and the third duration is that the second terminal encodes the second data to obtain the second data at the first The duration of the data transmitted on the uplink resource;

The duration between the start position of the time domain resource in the first uplink resource and the end position of the time domain resource in the side link resource is greater than or equal to the first duration.
The method according to claim 1, wherein the first uplink indication is further used to indicate a second uplink resource, and the second uplink resource is used to transmit the communication between the network device and the second terminal. Hybrid automatic repeat request confirmation, where the mixed automatic repeat request confirmation is used to indicate the transmission state of the second data on the sideline resource.
The method of any one of claims 1 to 6, further comprising:

The network device sends a second uplink indication to the first terminal, where the second uplink indication is used to indicate a third uplink resource, and the third uplink resource is used for the transmission of third data between the first terminal and the For transmission between network devices, the third data is part or all of the first data.
The method according to claim 7, wherein the second uplink indication occupies a second downlink resource, and the position of the time domain resource in the second downlink resource is the same as the time domain resource in the side link resource. before the location.
The method according to claim 7, wherein the sidelink indication includes identification information of sidelink transmission between the first terminal and the second terminal, and the second uplink indication includes The identification information is included, where the identification information is used to associate the data transmitted on the sidelink resource and the data transmitted on the third uplink resource.
A data transmission method, comprising:

The first terminal sends a resource request to the network device, where the resource request is used to request transmission resources of the first data;

The first terminal receives a sideline indication from the network device, where the sideline indication is used to indicate a sideline resource, and the sideline resource is used for the second data in the first terminal and the second terminal. The second data is part or all of the first data.
The method of claim 10, further comprising:

The first terminal receives a second uplink indication from the network device, the second uplink indication is used to indicate a third uplink resource, and the third uplink resource is used for the third data to be transmitted between the first terminal and the other terminal. For transmission between the network devices, the third data is part or all of the first data.
The method of claim 11, wherein the sidelink indication includes identification information of sidelink transmission between the first terminal and the second terminal, and the second uplink indication includes The identification information is included, where the identification information is used to associate the data transmitted on the sidelink resource and the data transmitted on the third uplink resource.
The method according to claim 11 or 12, wherein the second uplink indication occupies a second downlink resource, and the position of the time domain resource in the second downlink resource is in the time domain of the side link resource before the location of the resource.
A data transmission method, comprising:

The second terminal receives the first uplink indication from the network device, where the first uplink indication is used to indicate the first uplink resource;

In the case that the second terminal successfully receives the second data from the first terminal on the sidelink resource, the second terminal sends the second data to the network device on the first uplink resource.
The method according to claim 14, wherein the first uplink indication occupies a first downlink resource, and the position of the time domain resource in the first downlink resource is in the time domain of the side link resource before the location of the resource.
The method of claim 14, wherein the method further comprises:

receiving, by the second terminal, sideline control information from the first terminal;

The sidelink control information indicates identification information of sidelink transmission between the first terminal and the second terminal, the first uplink indication includes the identification information, and the identification information is used for association The data transmitted on the first uplink resource and the data transmitted on the sidelink resource.
The method of claim 14, wherein the time domain resource in the first uplink resource is determined by the time domain resource in the sidelink resource and the processing capability of the second terminal.
The method of claim 17, wherein the processing capability of the second terminal is used to indicate a first duration, the first duration is the sum of the second duration and the third duration, and the second duration is The second terminal decodes the data transmitted on the sideline resource to obtain the duration of the second data, and the third duration is that the second terminal encodes the second data to obtain the second data at the first The duration of the data transmitted on the uplink resource;

The duration between the start position of the time domain resource in the first uplink resource and the end position of the time domain resource in the side link resource is greater than or equal to the first duration.
The method according to any one of claims 14 to 18, wherein the first uplink indication is further used to indicate a second uplink resource, and the method further comprises:

The second terminal sends a hybrid automatic repeat request confirmation to the network device on the second uplink resource, where the hybrid automatic repeat request confirmation is used to indicate that the second data is on the side link resource. transfer status.
A communication device, characterized by comprising a module for performing the method according to any one of claims 1 to 9, or any one of 10 to 13, or any one of 14 to 19.
A communication device, characterized by comprising a processor and a communication interface, the communication interface being used for receiving signals from other communication devices other than the communication device and transmitting to the processor or transferring signals from the processor The signal is sent to other communication devices other than the communication device, and the processor is used to implement any one of claims 1 to 9, or any one of 10 to 13, or The method of any one of 14 to 19.
A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed by a communication device, any one of claims 1 to 9 is implemented. Items, or the method of any one of 10 to 13, or any one of 14 to 19.
A chip, characterized in that it includes at least one processor and an interface;

the interface for providing program instructions or data for the at least one processor;

The at least one processor is adapted to execute the program lines of instructions to implement the method of any one of claims 1 to 9, or any one of 10 to 13, or any one of 14 to 19.
A communication system, characterized in that it includes a network device, a first terminal and a second terminal, the network device is configured to execute the method of any one of claims 1 to 9, and the first terminal is configured to execute the claim The method of any one of claims 10 to 13, wherein the second terminal is configured to perform the method of any one of claims 14 to 19.
A computer program product, characterized in that, when a computer reads and implements the computer program product, the computer implements any one of claims 1 to 9, or any one of 10 to 13, or any one of claims 14 to 19 one of the methods described.