CN114365469B - Data transmission method, terminal device and network device - Google Patents

Abstract

Embodiments of the present application disclose a rate matching method and user equipment for soft combining data signals received from Uu interface links and sidelinks. In the method of the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and uses the second resource to receive the second data sent by the second terminal device. The second resource and the first resource satisfy the preset requirements. The mapping relationship ultimately determines that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

Description

A data transmission method, terminal device and network device

Technical field

The present application relates to the field of communications, and in particular, to a data transmission method, terminal device and network device.

Background technique

User cooperation (user equipment cooperation) is one of the main features supported by the next generation communication system. It can significantly improve the system capacity and network coverage, and at the same time reduce the load on the network device side. The transport block (TB) sent by the network device to the terminal device will be converted into a data signal through encoding and modulation, and then sent by the network device to the terminal device. This data signal can also be received by other terminal devices and the data signal carrying this transmission block can be forwarded to the terminal device through the side link, so as to improve the data receiving capability of the terminal device and improve the reliability of receiving data.

Currently, the terminal device can only identify whether the data signals transmitted multiple times on the Uu interface (Uu interface, Uu) link come from the same transmission block, or whether the data signals transmitted multiple times on the sidelink link come from the same transmission. block, where the Uu interface link is a link between the base station and the terminal device. Even if the data signals from multiple links come from the same transport block, the terminal device cannot combine the data signals. As a result, the data signals of different links cannot be combined, the success rate of the terminal device in recovering transmission blocks is reduced, and the reliability of communication is reduced.

Contents of the invention

Embodiments of the present application provide a data transmission method, a terminal device, and a network device for soft combining data signals received from Uu interface links and sidelinks.

The first aspect provides a data transmission method, including:

The first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource to receive the second data sent by the second terminal device. The second resource is a hybrid automatic repeater corresponding to the first resource or the first data. Pass the requesting process number HARQ ID to meet the preset mapping relationship. The mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping. It is determined that the first data and the second data belong to the same data, so the two data have the ability to be merged. possibility, which can improve the reliability of data transmission.

In some feasible embodiments, the mapping relationship is a time domain relationship, a frequency domain relationship and/or a code domain relationship.

In some feasible embodiments, the first terminal device determines the second resource according to the mapping relationship and the first resource or HARQ ID.

In some feasible embodiments, the first terminal device determines the time difference between receiving the second data and receiving the first data. If the time difference is less than or equal to the preset time difference, the first terminal device determines that the first data and the second data belong to steps for the same data. When the mapping relationship has nothing to do with time domain resources, then the time difference can be preset. If the second data is received within the preset time difference of receiving the first data, then the two data are determined to be the same data. If the second data is received after the preset time difference, second data, then it is also considered that the second data and the first data do not belong to the same data.

In some feasible embodiments, the first terminal device soft-merges the first data and the second data, so that the success rate of recovering the transmission block is greatly increased.

In some feasible embodiments, the first terminal device receives the high-level signaling configuration or physical layer signaling configuration sent by the network device, and the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship through configuration, so that the first terminal The device and the second terminal device may use the same mapping relationship.

In some feasible embodiments, the mapping relationship is predefined by the protocol, so no configuration is required, which simplifies the process.

In some feasible embodiments, the first data and the second data belong to the same transport block.

In some feasible embodiments, the second terminal device and the first terminal device belong to the same collaboration group, and the number of terminal devices in the collaboration group is greater than or equal to 2.

The second aspect provides a data transmission method, including:

The second terminal device uses the first resource to receive the first data sent by the network device, and then determines the second resource according to the preset mapping relationship and the hybrid automatic repeat request process number HARQ ID corresponding to the first resource or the first data. Mapping The relationship is resource-to-resource mapping or HARQ ID-to-resource mapping, and the second resource is used to send the second data to the first terminal device. The second data and the first data belong to the same data, so the two data have the possibility of merging. performance, which can improve the reliability of data transmission.

In some feasible embodiments, the mapping relationship is a time domain relationship, a frequency domain relationship and/or a code domain relationship.

In some feasible embodiments, the second terminal device receives the high-level signaling configuration or physical layer signaling configuration sent by the network device. The high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship, and the mapping relationship is resource to resource. Mapping or mapping of HARQ ID to resources.

In some feasible embodiments, the mapping relationship is predefined by the protocol.

In some feasible embodiments, the first data and the second data belong to the same transport block.

In some feasible embodiments, the second terminal device and the first terminal device belong to the same collaboration group, and the number of terminal devices in the collaboration group is greater than or equal to 2.

The third aspect provides a data transmission method, including: the network device determines a mapping relationship, the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping, and then sends high-level information to the first terminal device and the second terminal device respectively. Command configuration or physical layer signaling configuration, high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship, and use the first resource to send the first data to the first terminal device and the second terminal device respectively, so as to improve the A terminal device can have the possibility of merging the two pieces of data, which can improve the reliability of data transmission.

In some feasible embodiments, the mapping relationship is a time domain relationship, a frequency domain relationship and/or a code domain relationship.

The fourth aspect provides a first terminal device, including:

The transceiver module is configured to use the first resource to receive the first data sent by the network device.

The transceiver module is also configured to use the second resource to receive the second data sent by the second terminal device. The second resource and the hybrid automatic repeat request process number HARQ ID corresponding to the first resource or the first data satisfy a preset mapping relationship. , the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping.

A processing module configured to determine that the first data and the second data belong to the same data.

In some feasible embodiments, the processing module is also configured to determine the second resource according to the mapping relationship and the first resource or HARQ ID.

In some feasible embodiments, the transceiver module is also used to determine the time difference between receiving the second data and receiving the first data.

If the time difference is less than or equal to the preset time difference, the processing module performs the step of determining that the first data and the second data belong to the same data.

In some feasible embodiments, the processing module is also used to perform soft merging of the first data and the second data.

In some feasible embodiments, the transceiver module is also configured to receive high-level signaling configuration or physical layer signaling configuration sent by the network device, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship.

The fifth aspect provides a second terminal device for data transmission, including:

The transceiver module is configured to use the first resource to receive the first data sent by the network device.

The processing module is used for the second terminal device to determine the second resource according to a preset mapping relationship and the HARQ ID corresponding to the first resource or the first data, where the mapping relationship is a mapping from resource to resource or a mapping from HARQ ID to resource.

The transceiver module is also configured to use the second resource to send second data to the first terminal device, where the second data and the first data belong to the same data.

In some feasible embodiments, the transceiver module is also used to receive high-level signaling configuration or physical layer signaling configuration sent by the network device. The high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship, and the mapping relationship is resource Mapping to resources or mapping of HARQ IDs to resources.

A sixth aspect provides a network device, including: a processing module configured to determine a mapping relationship, where the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping. The transceiver module is configured to send high-level signaling configuration or physical layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship. The transceiver module is also configured to use the first resource to send the first data to the first terminal device and the second terminal device respectively.

A seventh aspect provides a first terminal device, including: a transceiver, a memory and a processor. Transceivers are used to communicate with devices or devices external to the processor. Memory is used to store programs. The processor is used to execute the program stored in the memory. When the program is executed, the processor executes the steps of the method described in the first aspect.

An eighth aspect provides a second terminal device, including: a transceiver, a memory and a processor. Transceivers are used to communicate with devices or devices external to the processor. Memory is used to store programs. The processor is used to execute the program stored in the memory. When the program is executed, the processor executes the steps of the method described in the second aspect.

A ninth aspect provides a network device, including: a transceiver, a memory and a processor.

Transceivers are used to communicate with devices or devices external to the processor. Memory is used to store programs. The processor is used to execute the program stored in the memory. When the program is executed, the processor executes the steps of the method described in the third aspect.

A tenth aspect provides a computer-readable storage medium, including instructions that, when run on a computer, cause the computer to perform the steps of the method described in the first aspect.

An eleventh aspect provides a computer-readable storage medium, including instructions that, when run on a computer, cause the computer to perform the steps of the method described in the second aspect.

A twelfth aspect provides a computer-readable storage medium, including instructions that, when run on a computer, cause the computer to perform the steps of the method described in the third aspect.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource that satisfies the preset mapping relationship with the first resource to receive the second data sent by the second terminal device, It is also determined that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

Description of drawings

Figure 1 is a schematic diagram of possible application scenarios of the embodiment of the present application;

Figure 2 is a schematic diagram of an embodiment of a data transmission method provided by this application;

Figure 3 is a schematic diagram of an embodiment of a data transmission method provided by this application;

Figure 4 is a schematic diagram of an embodiment of a data transmission method provided by this application;

Figure 5 is a schematic diagram of an embodiment of a data transmission method provided by this application;

Figure 6 is a schematic diagram of a first terminal device provided by an embodiment of the present application;

Figure 7 is a schematic diagram of a second terminal device provided by an embodiment of the present application;

Figure 8 is a schematic diagram of a network device provided by an embodiment of the present application;

Figure 9 is a schematic diagram of a first terminal device provided by an embodiment of the present application;

Figure 10 is a schematic diagram of a second terminal device provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments.

Figure 1 is a schematic diagram of possible application scenarios of the embodiment of the present application. As shown in Figure 1, the application scenario may include multiple terminal devices and network devices. As an example, the terminal device may be a mobile terminal, and the network device may be an access network device. As shown in Figure 1, a network device communicates with multiple terminal devices through uplinks and downlinks. Multiple terminal devices can form a user cooperation group, and terminal devices in a cooperation group can also communicate with each other. The network device sends information to the user cooperation group. Both the first terminal device and the second terminal device can receive the information through the Uu link. At the same time, the second terminal device can also forward the received information to the first terminal through the side link. device, the first terminal device receives two copies of the same data on the Uu link and the sidelink respectively. The first terminal device can also send an information request to the second terminal device when the reception fails or cannot establish a communication link with the network device, and receive the information relayed from the second terminal device, thereby completing the communication between the terminal devices in the cooperation group. collaboration between. The embodiments of the present application are not only applicable to cooperation between terminal devices, but also applicable to terminal device relay (UE relay).

In the following, some terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) Terminal device. The first terminal device or the second terminal device involved in this application may include various devices with wireless communication functions or units, components, modules, devices, chips or system-level chips in such devices ( System-on-a-Chip (SOC), the device with wireless communication function may be, for example, a vehicle-mounted device, a wearable device, a computing device or other devices connected to a wireless modem, a mobile station (MS), a terminal (terminal) or user equipment (UE), etc. When the first terminal device and the second terminal device are vehicle-mounted equipment, they can be placed or installed in the vehicle. The vehicle-mounted equipment can be regarded as a part of the vehicle, or can be regarded as a module or module placed in the vehicle. The vehicle-mounted terminal device can also be called It is an on board unit (OBU).

The first terminal device or the second terminal device involved in the embodiment of the present application may also include a device that provides voice and/or data connectivity to the user. Specifically, it includes a device that provides voice to the user, or includes a device that provides data connectivity to the user. devices that provide voice and data connectivity to users. This may include, for example, a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (radio access network, RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal device may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (D2D) terminal equipment, vehicle to everything (V2X) terminal equipment, Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station) , mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent ( user agent), or user device (user device), etc. For example, this may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, computer-built-in mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA) , and other equipment. Also includes constrained devices, such as devices with lower power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, the first terminal device or the second terminal device involved in the embodiment of the present application may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices. It is a general term for applying 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 devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Used, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The terminal device may be a terminal device, or may be a module used to implement the functions of the terminal device. The module may be set in the terminal device, or may be set independently from the terminal device. The module may be, for example, a chip, a chip system or a module. System on chip, etc.

(2) Network devices, for example, include access network (AN) equipment, such as base stations (for example, access points), which may refer to devices in the access network that communicate with wireless terminal equipment through one or more cells over the air interface. Equipment, or for example, a network device in vehicle-to-everything (V2X) technology is a roadside unit (RSU). The base station may be used to convert received air frames to and from IP packets and act as a router between the terminal device and the rest of the access network, which may include the IP network. RSU can be a fixed infrastructure entity that supports V2X applications and can exchange messages with other entities that support V2X applications. Network devices can also coordinate attribute management of air interfaces. For example, the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutionaryNode B) in a long term evolution (LTE) system or long term evolution-advanced (LTE-A), or It may also include the next generation node B (next generation node B, gNB) in the fifth generation mobile communication technology (the ^5th generation, 5G) new radio (new radio, NR) system (also referred to as the NR system) or may also include The embodiments of this application are not limited to the centralized unit (CU) and the distributed unit (DU) in the cloud radio access network (Cloud RAN) system.

(3) Sidelink refers to the link between terminal devices. The uplink refers to the link through which the terminal device sends information to the network device, and the downlink refers to the link through which the terminal device receives information from the network device.

(4) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or priority of multiple objects. Importance. For example, the first power control factor and the second power control factor are only used to distinguish different power control factors, but do not necessarily represent differences in content, priority or importance of the two power control factors.

In the embodiment of this application, user collaboration is one of the main features supported by the next generation communication system, which can significantly improve the system capacity and network coverage, and at the same time reduce the load on the base station. The transport blocks sent by the base station to the terminal device will be converted into data signals through coding and modulation, and then sent by the base station to the terminal device. This data signal can also be received by other terminal devices and the data signal carrying this transmission block can be forwarded to the terminal device through the side link, so as to improve the data receiving capability of the terminal device and improve the reliability of receiving data.

Currently, the terminal device can only identify whether the data signals transmitted multiple times on the Uu interface link come from the same transmission block, or whether the data signals transmitted multiple times on the sidelink link come from the same transmission block, where the Uu interface The link is a link between the base station and the terminal device. Even if the data signals from multiple links come from the same transport block, the terminal device cannot combine the data signals. As a result, the data signals of different links cannot be combined, the success rate of the terminal device in recovering transmission blocks is reduced, and the reliability of communication is reduced.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource that satisfies the preset mapping relationship with the first resource to receive the second data sent by the second terminal device, It is also determined that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

The embodiments of the present application will be described in more detail below with reference to specific examples, taking the first terminal device, the second terminal device, and the first network device as examples.

Please refer to Figure 2, which is an embodiment of a data transmission method provided by this application, including:

201. The first terminal device uses the first resource to receive the first data sent by the network device.

202. The first terminal device uses the second resource to receive the second data sent by the second terminal device. The second resource and the hybrid automatic repeat request process number HARQ ID corresponding to the first resource or the first data satisfy a preset mapping relationship. , the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping.

203. The first terminal device determines that the first data and the second data belong to the same data.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource that satisfies the preset mapping relationship with the first resource to receive the second data sent by the second terminal device, It is also determined that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

Specifically, please refer to Figure 3, which is an embodiment of a data transmission method provided by this application, including:

301. The network device determines a mapping relationship, and the mapping relationship is a mapping from resource to resource.

In order to allow the second terminal device and the first terminal device to send and receive data signals on the side link on the same resource (the second terminal device is the transmitter and the first terminal device is the receiver), the network device needs to first Configure a mapping relationship. In this embodiment of the present application, the mapping relationship is a resource-to-resource mapping.

Specifically, the mapping relationship may include the corresponding relationship between two non-empty sets and their elements. Among them, the two non-empty sets respectively represent the value ranges of the two resources, and the corresponding relationship is a one-to-one or many-to-one correspondence between the elements of the two non-empty sets, which is not limited here.

For example, the elements of non-empty set 1 are resources 1/2/3, and the elements of non-empty set 2 are resources 3/4/5. The corresponding relationship can be a one-to-one relationship:

Resource 1->Resource 3

Resource 2->Resource 4

Resource 3->Resource 5

It can also be a many-to-one relationship:

Resource 1->Resource 4

Resource 2->Resource 4

Resource 3->Resource 5

In some feasible embodiments, the mapping relationship can be a table from resources to resources, or a calculation formula from resources to resources. Specifically, let y=f(x), where x is the resource used by the data signal sent by the network device, and y is the resource used by the second terminal device after receiving the data signal sent by the network device and forwarding it to the first terminal device. of resources.

In this embodiment of the present application, the resource may be at least one of time domain resources, frequency domain resources or code domain resources or a combination thereof, such as a data block (resource block, RB) or resource element (resource element) of a time-frequency resource. RE).

In the following, time domain resources, frequency domain resources and code domain resources are described respectively. It is assumed that one of the mapping relationships is:

First resource->Second resource

Take time domain resources as an example, let There are no restrictions anywhere. Taking symbols as an example, y=x+k represents the k-th symbol after x. It should be noted that y represents the symbol in the full frequency domain and the full code domain under the kth symbol after x, which can be the second resource. For example, x is the last symbol of the data signal transmitted by the network device, then let y=x+k, that is, in the time domain indicated by the k-th symbol after Can be a secondary resource.

Taking frequency domain resources as an example again, let x be the value of the frequency domain unit of the first resource, such as RR. It should be noted that one RR spans 12 subcarriers. Assume f(x)=x+k, k represents the number of frequency domain units representing orthogonal frequency division multiplexing, and is a constant. Then, y=x+k represents the kth frequency domain unit above x. It should be noted that y represents the symbol in the full time domain and the full code domain under the kth symbol after x, which can be the second resource.

Taking code domain resources as an example again, let x be the code domain resource number of the first resource, let f(x)=x+k, k represents the number of codes in a preset order, and is a constant. Then, y=x+k represents the kth code domain resource number following x according to the preset sequence. It should be noted that y represents the full frequency domain and full time domain symbols under the kth symbol after x, which can be the second resource.

In this embodiment of the present application, the calculation of the second resource may not only consider one of time domain resources, frequency code resources or code domain resources, but may also be any combination of the three, which is not limited here. In some feasible embodiments, this mapping relationship can also be predefined through a protocol without requiring high-level signaling configuration or physical layer signaling configuration, which is not limited here.

302. The network device sends the high-level signaling configuration or the physical-layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or the physical layer signaling configuration is used to indicate the mapping relationship.

In this embodiment of the present application, the first terminal device and the second terminal device belong to the same collaboration group, and the number of terminal devices in the collaboration group is greater than or equal to 2. In the communication behavior involved in the embodiment of the present application, the first terminal device is the target terminal device, and the second terminal device is the cooperating terminal device. That is to say, the target of the network device sending data is the first terminal device. Although it is also sent to the second terminal device at the same time, the purpose is for the second terminal device to forward it to the first terminal device through the side link. Therefore, the network device needs to separately Send high-level signaling configuration or physical layer signaling configuration to the first terminal device and the second terminal device, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship, so that the first terminal device receives the Uu interface link The received data signal and the data signal received from the side link are softly combined to improve the reliability of data transmission.

303. The network device uses the first resource to send the first data to the first terminal device and the second terminal device respectively.

In this embodiment of the present application, the network device can use the first resource to send the first data to the first terminal device and the second terminal device respectively through the Uu interface. Then the first terminal device and the second terminal device receive the first data on the first resource. First data. It should be noted that the network device may send the first data in the form of sending a transport block.

304. The first terminal device determines the second resource according to the mapping relationship and the first resource.

305. The second terminal device determines the second resource according to the mapping relationship and the first resource.

After the first terminal device/second terminal device receives the first data on the first resource, the second resource may be determined according to the first resource and the mapping relationship. For details, please refer to the description of the mapping relationship in step 301.

It should be noted that since the second terminal device serves as the assisting terminal device, it needs to forward the received first data to the first terminal device as the target terminal device. Then, the second terminal device and the first terminal device need to determine the same resource, that is, the second resource, and transmit the content of the first data on the second resource. Therefore, the first terminal device and the second terminal device need to obtain the same mapping relationship to determine the same second resource based on the first resource.

306. The second terminal device uses the second resource to send second data to the first terminal device. The second data and the first data belong to the same data.

In this embodiment of the present application, after the second terminal device determines the second resource, it sends the second data to the first terminal device through the side link, where the second data and the first data belong to the same data, that is, they belong to The same transport block may have different data structures or forms, or may use different protocols, but the information it carries is the same.

307. The first terminal device determines that the first data and the second data belong to the same data.

When the first terminal device receives the second data on the second resource, it determines that the second data and the first data are the same data, and in some feasible embodiments, are the same transport block.

In some feasible embodiments, if the mapping relationship is determined through frequency domain resources and/or code domain resources and has nothing to do with time domain resources, then the time difference can be preset. If the first data is received within the preset time difference, When the second data is received, it is determined that the two data are the same data. If the second data is received after a preset time difference, it is also considered that the second data and the first data do not belong to the same data.

308. The first terminal device soft-merges the first data and the second data.

The first terminal device may merge the first data and the second data. The merging method may be merging part of two pieces of data or merging two pieces of data. Preferably, the first terminal device performs joint processing on the first data and the second data. The signal-to-interference-to-noise ratio after joint processing is higher than that of the single data signal. The success rate of recovering the transmission block from the combined data signal will be greatly increased. . Optionally, if the merge fails, multiple receiving and merging processes can be performed. Optionally, the first terminal device can also combine multiple data signals belonging to the same data from the first network device. The first data and the second data belonging to the same data means that the first data and the second data come from the same Transport block, or the same source data or the same original data. Optionally, the first terminal device may also combine multiple data signals from the same transport block, the same source data, or the same original data from the second terminal device.

Optionally, the data merged and processed by the first terminal device are not limited to data coming from the network device and the terminal device respectively. The first terminal device may also combine multiple signals from the same data from the base station, or combine multiple signals from the second terminal device with the same data, or may combine multiple signals from different terminal devices, for example, Multiple signals from the same data of the second terminal device and the third terminal device are combined to obtain beneficial effects. Here, the same data refers to the same transport block, the same source data or the same original data.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource that satisfies the preset mapping relationship with the first resource to receive the second data sent by the second terminal device, It is also determined that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

It should be noted that the mapping relationship can be not only the mapping from resource to resource, but also the mapping from HARQ ID to resource. Specifically, please refer to Figure 4, which is an embodiment of a data transmission method provided by this application, including:

401. The network device determines the mapping relationship, which is the mapping from HARQ ID to resources.

In order to allow the second terminal device and the first terminal device to send and receive data signals on the side link on the same resource (the second terminal device is the transmitter and the first terminal device is the receiver), the network device needs to first Configure a mapping relationship. In this embodiment of the present application, the mapping relationship is a mapping from HARQ ID to resources.

Specifically, the mapping relationship may include the corresponding relationship between two non-empty sets and their elements. Among them, the two non-empty sets respectively represent the value ranges of the two resources, and the corresponding relationship is a one-to-one or many-to-one correspondence between the elements of the two non-empty sets, which is not limited here.

For example, the elements of non-empty set 1 are HARQ ID 1/2/3, and the elements of non-empty set 2 are resources 3/4/5. The corresponding relationship can be a one-to-one relationship:

HARQ ID 1->Resource 3

HARQ ID 2->Resource 4

HARQ ID 3->Resource 5

It can also be a many-to-one relationship:

HARQ ID 1->Resource 4

HARQ ID 2->Resource 4

HARQ ID 3->Resource 5

In some feasible embodiments, the mapping relationship may be a table from HARQ ID to resources, or it may be a calculation formula from HARQ ID to resources. Specifically, suppose y=f(x), where x is the HARQ ID corresponding to the data signal sent by the network device, and y is the second terminal device forwarding the data signal to the first terminal device after receiving the data signal sent by the network device. resources used. In some feasible embodiments, this mapping relationship can also be predefined through a protocol without requiring high-level signaling configuration or physical layer signaling configuration, which is not limited here.

402. The network device sends the high-level signaling configuration or the physical layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or the physical layer signaling configuration is used to indicate the mapping relationship.

Step 402 is the same as step 302 and will not be described again here.

403. The network device sends the first data to the first terminal device and the second terminal device respectively.

In this embodiment of the present application, the network device can send the first data to the first terminal device and the second terminal device respectively through the Uu interface, and then the first terminal device and the second terminal device receive the first data on the first resource. It should be noted that the network device may send the first data in the form of sending a transport block.

404. The first terminal device determines the second resource according to the mapping relationship and the HARQ ID corresponding to the first data.

405. The second terminal device determines the second resource according to the mapping relationship and the HARQ ID corresponding to the first data.

After the first terminal device/second terminal device receives the first data on the first resource, the second resource may be determined according to the HARQ ID corresponding to the first data and the mapping relationship. For details, please refer to the description of the mapping relationship in step 401.

It should be noted that since the second terminal device serves as the assisting terminal device, it needs to forward the received first data to the first terminal device as the target terminal device. Then, the second terminal device and the first terminal device need to determine the same resource, that is, the second resource, and transmit the content of the first data on the second resource. Therefore, the first terminal device and the second terminal device need to obtain the same mapping relationship to determine the same second resource according to the HARQ ID corresponding to the first data.

406. The second terminal device uses the second resource to send the second data to the first terminal device. The second data and the first data belong to the same data.

407. The first terminal device determines that the first data and the second data belong to the same data.

408. The first terminal device soft-merges the first data and the second data.

Steps 406-408 are the same as steps 306-308 and will not be described again here.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource whose HARQ ID corresponding to the first data satisfies the preset mapping relationship to receive the first data sent by the second terminal device. second data, and determine that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

In some feasible embodiments, after receiving the first data, the first terminal device does not need to determine the second resource, but monitors on the sidelink. Specifically, please refer to Figure 5, which is an embodiment of a data transmission method provided by this application, including:

501. The network device determines a mapping relationship, which is resource-to-resource mapping or HARQ ID-to-resource mapping.

For details, please refer to steps 301/401, which will not be described here.

502. The network device sends high-level signaling configuration or physical layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship.

Step 502 is the same as step 302/402 and will not be described again here.

503. The network device sends the first data to the first terminal device and the second terminal device respectively.

For details, please refer to steps 303/403, which will not be described here.

504. The second terminal device determines the second resource according to the mapping relationship and the HARQ ID corresponding to the first data.

For details, please refer to steps 305/405, which will not be described here.

505. The first terminal device monitors the side link to receive the second data.

In this embodiment of the present application, after receiving the first data, the first terminal device does not determine the second resource, but monitors the side link.

506. The second terminal device uses the second resource to send second data to the first terminal device. The second data and the first data belong to the same data.

For details, please refer to steps 306/406, which will not be described here.

507. The first terminal device determines that the second resource for receiving the second data matches the mapping relationship between the HARQ ID corresponding to the first resource/first data.

In this embodiment of the present application, after receiving the second data, the second resource used to receive the second data is determined, and the HARQ ID corresponding to the second resource and the first resource used to receive the first data or the first data is detected. Whether it conforms to the mapping relationship. If it matches, proceed to the next step.

508. The first terminal device determines that the first data and the second data belong to the same data.

509. The first terminal device soft-merges the first data and the second data.

Steps 508-509 are the same as steps 307-308/407-408 and will not be described again here.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, then monitors the side link to receive the second data, and detects the second resource used to receive the second data and the first data Whether the corresponding HARQ ID or the first resource that receives the first data satisfies the preset mapping relationship. If so, it is determined that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve Reliability of data transmission.

The method embodiments of the present application have been described above, and the terminal device and network device of the present application will be described below.

Please refer to Figure 6, which is a first terminal device 600 provided by an embodiment of the present application, including:

The transceiver module 601 is configured to use the first resource to receive the first data sent by the network device.

The transceiver module 601 is also configured to use the second resource to receive the second data sent by the second terminal device. The second resource and the hybrid automatic repeat request process number HARQ ID corresponding to the first resource or the first data satisfy the preset mapping. Relationship, the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping.

The processing module 602 is used to determine that the first data and the second data belong to the same data.

In some feasible embodiments, the processing module 602 is also used to determine the second resource according to the mapping relationship and the first resource or HARQID.

In some feasible embodiments, the transceiving module 601 is also used to determine the time difference between receiving the second data and receiving the first data.

If the time difference is less than or equal to the preset time difference, the processing module 602 performs the step of determining that the first data and the second data belong to the same data.

In some feasible embodiments, the processing module 602 is also used to soft-merge the first data and the second data.

In some feasible embodiments, the transceiver module 601 is also used to receive high-level signaling configuration or physical layer signaling configuration sent by the network device, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship.

Please refer to Figure 7, which is a second terminal device 700 provided by an embodiment of the present application, including:

The transceiver module 701 is configured to use the first resource to receive the first data sent by the network device.

The processing module 702 is used for the second terminal device to determine the second resource according to a preset mapping relationship and the HARQ ID corresponding to the first resource or the first data. The mapping relationship is a mapping from resource to resource or a mapping from HARQ ID to resource.

The transceiver module 701 is also configured to use the second resource to send second data to the first terminal device, where the second data and the first data belong to the same data.

In some feasible embodiments, the transceiver module 701 is also used to receive high-level signaling configuration or physical layer signaling configuration sent by the network device. The high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship, and the mapping relationship is: Resource-to-resource mapping or HARQ ID-to-resource mapping.

Please refer to FIG. 8 , which is a network device 800 provided by an embodiment of the present application, including: a processing module 801 for determining a mapping relationship, where the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping. The transceiver module 802 is configured to send high-level signaling configuration or physical layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship. The transceiver module 802 is also configured to use the first resource to send the first data to the first terminal device and the second terminal device respectively.

Please refer to FIG. 9 , which is a first terminal device 900 provided by an embodiment of the present application, including: a transceiver 901, a memory 902, and a processor 903. The transceiver 901 is used to communicate with devices or devices external to the processor 903 . Memory 902 is used to store programs. The processor 903 is used to execute the program stored in the memory. When the program is executed, the processor 903 executes the above-mentioned steps executed by the first terminal device 900 .

Please refer to FIG. 10 , which is a second terminal device 1000 provided by an embodiment of the present application, including: a transceiver 1001, a memory 1002, and a processor 1003. The transceiver 1001 is used to communicate with devices or devices external to the processor 1003 . Memory 1002 is used to store programs. The processor 1003 is used to execute the program stored in the memory 1002. When the program is executed, the processor executes the steps executed by the second terminal device 1000.

Please refer to FIG. 11 , which is a second terminal device 1100 provided by an embodiment of the present application, including: a transceiver 1101, a memory 1102, and a processor 1103.

The transceiver 1101 is used to communicate with devices or devices external to the processor 1103 . Memory 1102 is used to store programs. The processor 1103 is used to execute the program stored in the memory 1102. When the program is executed, the processor 1103 executes the steps executed by the network device 1100.

Through the embodiment of the present application, the first terminal device uses the first resource to receive the first data sent by the network device, and then uses the second resource that satisfies the preset mapping relationship with the first resource to receive the second data sent by the second terminal device, It is also determined that the first data and the second data belong to the same data, so the two data have the possibility of merging, which can improve the reliability of data transmission.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store, or a data storage device such as a server or data center integrated with one or more available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), etc.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

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

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.

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

As mentioned above, the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still make the foregoing technical solutions. The technical solutions described in each embodiment may be modified, or some of the technical features may be equivalently replaced; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in each embodiment of the present application.

Claims (31)

1. A data transmission method, characterized by including: The first terminal device uses the first resource to receive the first data sent by the network device; The first terminal device uses a second resource to receive the second data sent by the second terminal device, and the second resource is a hybrid automatic repeat request process number HARQ ID corresponding to the first resource or the first data. Satisfy the preset mapping relationship, which is resource-to-resource mapping or HARQ ID-to-resource mapping; The first terminal device determines that the first data and the second data belong to the same data. 2. The method according to claim 1, characterized in that the mapping relationship is a time domain relationship, a frequency domain relationship and/or a code domain relationship. 3. The method according to claim 1 or 2, characterized in that the method further includes: The first terminal device determines the second resource according to the mapping relationship and the first resource or the HARQ ID. 4. The method according to claim 1 or 2, characterized in that, The first terminal device determines a time difference between receiving the second data and receiving the first data; If the time difference is less than or equal to the preset time difference, the first terminal device performs the step of determining that the first data and the second data belong to the same data. 5. The method according to claim 1 or 2, characterized in that, The first terminal device soft-merges the first data and the second data. 6. The method according to claim 1 or 2, characterized in that, The first terminal device receives the high-level signaling configuration or physical layer signaling configuration sent by the network device, and the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship. 7. The method according to claim 1 or 2, characterized in that the mapping relationship is predefined by a protocol. 8. The method according to claim 1 or 2, characterized in that the first data and the second data belong to the same data including: The first data and the second data belong to the same transport block. 9. The method according to claim 1 or 2, characterized in that, The second terminal device and the first terminal device belong to the same cooperation group, and the number of terminal devices in the cooperation group is greater than or equal to 2. 10. A data transmission method, characterized by including: The second terminal device uses the first resource to receive the first data sent by the network device; The second terminal device determines the second resource according to a preset mapping relationship and the hybrid automatic repeat request process number HARQ ID corresponding to the first resource or the first data. The mapping relationship is resource to resource. Mapping or mapping of HARQ ID to resources; The second terminal device uses the second resource to send second data to the first terminal device, and the second data and the first data belong to the same data. 11. The method according to claim 10, characterized in that the mapping relationship is a time domain relationship, a frequency domain relationship and/or a code domain relationship. 12. The method according to claim 10 or 11, characterized in that, The second terminal device receives the high-level signaling configuration or physical layer signaling configuration sent by the network device. The high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship, and the mapping relationship is a resource. Mapping to resources or mapping of HARQ IDs to resources. 13. The method according to claim 10 or 11, characterized in that the mapping relationship is predefined by a protocol. 14. The method according to claim 10 or 11, characterized in that the first data and the second data belong to the same data including: The first data and the second data belong to the same transport block. 15. The method according to claim 10 or 11, characterized in that, The second terminal device and the first terminal device belong to the same cooperation group, and the number of terminal devices in the cooperation group is greater than or equal to 2. 16. A data transmission method, characterized by including: The network device determines a mapping relationship, where the mapping relationship is resource-to-resource mapping or HARQ ID-to-resource mapping; The network device sends a high-level signaling configuration or a physical layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship; The network device uses a first resource to send first data to the first terminal device and the second terminal device respectively. 17. The method according to claim 16, characterized in that the mapping relationship is a time domain relationship, a frequency domain relationship and/or a code domain relationship. 18. A first terminal device, characterized in that it includes: A transceiver module, configured to use the first resource to receive the first data sent by the network device; The transceiver module is also configured to use a second resource to receive the second data sent by the second terminal device, and the second resource is the hybrid automatic repeat request process number corresponding to the first resource or the first data. HARQ ID satisfies the preset mapping relationship, which is a mapping from resource to resource or a mapping from HARQ ID to resource; A processing module, configured to determine that the first data and the second data belong to the same data. 19. The first terminal device according to claim 18, characterized in that, The processing module is further configured to determine the second resource according to the mapping relationship and the first resource or the HARQ ID. 20. The first terminal device according to claim 18 or 19, characterized in that, The transceiver module is also used to determine the time difference between receiving the second data and receiving the first data; If the time difference is less than or equal to the preset time difference, the processing module performs the step of determining that the first data and the second data belong to the same data. 21. The first terminal device according to claim 18 or 19, characterized in that, The processing module is also used to perform soft merging of the first data and the second data. 22. The first terminal device according to claim 18 or 19, characterized in that, The transceiver module is also configured to receive high-level signaling configuration or physical layer signaling configuration sent by the network device, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship. 23. A second terminal device for data transmission, characterized in that it includes: A transceiver module, configured to use the first resource to receive the first data sent by the network device; A processing module configured for the second terminal device to determine a second resource according to a preset mapping relationship and the HARQ ID corresponding to the first resource or the first data, where the mapping relationship is a resource-to-resource mapping or Mapping of HARQ ID to resources; The transceiver module is also configured to use the second resource to send second data to the first terminal device, where the second data and the first data belong to the same data. 24. The second terminal device according to claim 23, characterized in that: The transceiver module is also configured to receive high-level signaling configuration or physical layer signaling configuration sent by the network device. The high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship. The mapping relationship It is a resource-to-resource mapping or a HARQ ID-to-resource mapping. 25. A network device, characterized by comprising: A processing module, used to determine a mapping relationship, which is a mapping from resource to resource or a mapping from HARQ ID to resource. A transceiver module, configured to send high-level signaling configuration or physical layer signaling configuration to the first terminal device and the second terminal device respectively, where the high-level signaling configuration or physical layer signaling configuration is used to indicate the mapping relationship; The transceiver module is also configured to use the first resource to send the first data to the first terminal device and the second terminal device respectively. 26. A first terminal device, characterized in that it includes: a transceiver, a memory and a processor; The transceiver is used to communicate with a device or device external to the processor; The memory is used to store programs; The processor is configured to execute a program stored in the memory. When the program is executed, the processor executes the method according to any one of claims 1-9. 27. A second terminal device, characterized in that it includes: a transceiver, a memory and a processor; The transceiver is used to communicate with a device or device external to the processor; The memory is used to store programs; The processor is configured to execute a program stored in the memory. When the program is executed, the processor executes the method according to any one of claims 10-15. 28. A network device, characterized by comprising: a transceiver, a memory and a processor; The transceiver is used to communicate with a device or device external to the processor; The memory is used to store programs; The processor is configured to execute a program stored in the memory. When the program is executed, the processor executes the method of claim 16 or 17. 29. A computer-readable storage medium, characterized by comprising instructions that, when run on a computer, cause the computer to perform the method according to any one of claims 1-9. 30. A computer-readable storage medium, characterized by comprising instructions that, when run on a computer, cause the computer to perform the method according to any one of claims 10-15. 31. A computer-readable storage medium, characterized by comprising instructions that, when run on a computer, cause the computer to perform the method of claim 16 or 17.