WO2020164542A1

WO2020164542A1 - Communication method, device and storage medium

Info

Publication number: WO2020164542A1
Application number: PCT/CN2020/075073
Authority: WO
Inventors: 薛祎凡; 李晓翠; 徐海博; 邝奕如
Original assignee: 华为技术有限公司
Priority date: 2019-02-15
Filing date: 2020-02-13
Publication date: 2020-08-20
Also published as: CN111586847B; CN111586847A; WO2020164542A9

Abstract

The present application embodiment provides a communication method, a device and a storage medium, the method comprising: a first terminal device receiving control information sent by a network device, the control information being used for indicating sidelink (SL) resources and a service type applicable to the SL resources, the service type comprising at least one of the following: broadcast service, unicast service and multicast service; the first terminal device using the SL resources for sending data to a second terminal device, the service type corresponding to the data being identical to the service type applicable to the SL resources. Insofar as control information is used for indicating SL resources and a service type applicable to said SL resources, therefore, the present application embodiment allows for avoiding a difference in understanding between a terminal device and a network device with regard to a service type applicable to the same SL resources, thus ensuring SL communication between terminal devices.

Description

Communication method, device and storage medium

Technical field

The embodiments of the present application relate to communication technologies, and in particular, to a communication method, device, and storage medium.

Background technique

With the evolution of communication technology, the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) specification introduces the side link (Sidelink, SL). SL supports the forwarding between two terminal devices without network equipment. Transmit data, which can greatly reduce data delay.

In terms of physical layer design, the SL in the Long Term Evolution (LTE) system only supports broadcast (broadcast) services. Regardless of the backward compatibility of the communication system, the SL in the New Radio (NR) system supports three service types: broadcast service, groupcast service, and unicast service. Since in the SL in the NR system, the terminal device may have broadcast and unicast/multicast service requirements at the same time. Therefore, when the terminal device requests the network device for SL resources, a Buffer State Report (BSR) ) Carries information about multiple services. In this way, for the SL resources allocated to the terminal device by the network device according to the BSR, there may be a misunderstanding between the terminal device and the network device. For example, the SL resource allocated by the network device to the terminal device for broadcast services is The terminal equipment is used for unicast services, etc., thereby affecting normal communication.

Summary of the invention

The embodiments of the present application provide a communication method, device, and storage medium, so as to avoid the understanding deviation of the same SL resource by the terminal device and the network device, and ensure the SL communication between the terminal devices.

In a first aspect, an embodiment of the present application provides a communication method, including: a first terminal device receives control information sent by a network device, the control information is used to indicate SL resources and service types to which the SL resources are applicable. The service types include the following At least one of: broadcast services, unicast services, and multicast services; the first terminal device uses the SL resource to send data to the second terminal device, and the service type corresponding to the data is the same as the service type applicable to the SL resource. Since the control information is used to indicate the SL resource and the service type to which the SL resource is applicable, the embodiment of the present application can avoid the terminal device and the network device's understanding of the service type applicable to the same SL resource, and ensure the SL between the terminal devices Communication.

In the first embodiment of the first aspect, the format of the control information is used to indicate the service type to which the SL resource is applicable. Therefore, the first terminal device can directly obtain the service type applicable to the SL resource according to the control information, avoiding the misunderstanding of the service type applicable to the same SL resource by the terminal device and the network device, and ensuring the SL communication between the terminal devices.

According to the first embodiment of the first aspect, in the second embodiment of the first aspect, the format of the control information includes the length of the control information, and the length of the control information is used to indicate to which the SL resource is applicable business type. The length of control information is used to distinguish the types of services applicable to SL resources.

In a third embodiment of the first aspect, the control information includes indication information, and the indication information is used to indicate a service type to which the SL resource is applicable. The service types applicable to SL resources are distinguished by the control information contained in the control information. Optionally, the indication information may specifically be the radio network temporary identifier RNTI.

According to the third embodiment of the first aspect, in the fourth embodiment of the first aspect, the indication information is used to indicate whether the SL resource supports HARQ transmission, wherein the SL resource supports HARQ transmission and the SL resource supports HARQ transmission. The resource does not support HARQ transmission, respectively indicating different service types to which the SL resource applies.

According to the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the SL resource supporting HARQ transmission is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service; The SL resource does not support HARQ transmission to indicate that the service type to which the SL resource is applicable is a broadcast service.

According to a third embodiment of the first aspect, in the sixth embodiment of the first aspect, the indication information is used to indicate the number of times that the first terminal device uses the SL resource, wherein the number of times is used to indicate The service type to which the SL resource is applicable.

According to the sixth embodiment of the first aspect, in the seventh embodiment of the first aspect, the number of times is greater than the preset number of times to indicate that the service type to which the SL resource is applicable is a broadcast service; the number of times is less than or equal to all The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the sixth embodiment of the first aspect, in the eighth embodiment of the first aspect, the number of times is greater than or equal to the preset number of times to indicate that the service type to which the SL resource is applicable is a broadcast service; The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the third embodiment of the first aspect, in the ninth embodiment of the first aspect, the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate to which SL resources are applicable Different business types.

In a tenth embodiment of the first aspect, the control information is scrambled control information, wherein different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable. The scrambling information is used to distinguish different service types applicable to SL resources.

According to any of the foregoing embodiments of the first aspect, in the eleventh embodiment of the first aspect, before the first terminal device receives the control information sent by the network device, the method further includes: the first terminal device sends A message used to request the SL resource to the network device.

According to any of the foregoing embodiments of the first aspect, in the twelfth embodiment of the first aspect, one type of service corresponds to at least one piece of control information.

In a second aspect, an embodiment of the present application provides a communication method, including: a network device generates control information, the control information is used to indicate SL resources and service types to which the SL resources are applicable, and the service types include at least the following One: broadcast service, unicast service and multicast service; the network device sends the control information to the terminal device. Since the control information is used to indicate the SL resource and the service type to which the SL resource is applicable, the embodiment of the present application can avoid the terminal device and the network device's understanding of the service type applicable to the same SL resource, and ensure the SL between the terminal devices Communication.

In the first embodiment of the second aspect, the format of the control information is used to indicate the service type to which the SL resource is applicable. Therefore, the first terminal device can directly obtain the service type applicable to the SL resource according to the control information, avoiding the misunderstanding of the service type applicable to the same SL resource by the terminal device and the network device, and ensuring the SL communication between the terminal devices.

According to the first embodiment of the second aspect, in the second embodiment of the second aspect, the format of the control information includes the length of the control information, and the length of the control information is used to indicate the applicable SL resource business type. The length of control information is used to distinguish the types of services applicable to SL resources.

In a third embodiment of the second aspect, the control information includes indication information, and the indication information is used to indicate a service type to which the SL resource is applicable. The service types applicable to SL resources are distinguished by the control information contained in the control information. Optionally, the indication information may specifically be the radio network temporary identifier RNTI.

According to the third embodiment of the second aspect, in the fourth embodiment of the second aspect, the indication information is used to indicate whether the SL resource supports HARQ transmission, wherein the SL resource supports HARQ transmission and the SL resource supports HARQ transmission. The resource does not support HARQ transmission, respectively indicating different service types to which the SL resource applies.

According to the fourth embodiment of the second aspect, in the fifth embodiment of the second aspect, the SL resource supporting HARQ transmission is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service; The SL resource does not support HARQ transmission to indicate that the service type to which the SL resource is applicable is a broadcast service.

According to the third embodiment of the second aspect, in the sixth embodiment of the second aspect, the indication information is used to indicate the number of times the first terminal device uses the SL resource, wherein the number of times is used to indicate The service type to which the SL resource is applicable.

According to the sixth embodiment of the second aspect, in the seventh embodiment of the second aspect, the number of times is greater than the preset number of times to indicate that the service type to which the SL resource is applicable is a broadcast service; the number of times is less than or equal to all The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the sixth embodiment of the second aspect, in the eighth embodiment of the second aspect, the number of times is greater than or equal to the preset number of times to indicate that the service type to which the SL resource is applicable is a broadcast service; The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the third embodiment of the second aspect, in the ninth embodiment of the second aspect, the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate to which SL resources are applicable Different business types.

In a tenth embodiment of the second aspect, the control information is scrambled control information, wherein different scrambling information of the control information is used to indicate different service types to which the SL resources are applicable. The scrambling information is used to distinguish different service types applicable to SL resources.

According to any of the foregoing embodiments of the second aspect, in the eleventh embodiment of the second aspect, before the network device generates control information, the method further includes: the network device receives a request for the SL resource Message, the message is sent by the terminal device.

According to any of the foregoing embodiments of the second aspect, in the twelfth embodiment of the second aspect, one type of service corresponds to at least one piece of control information.

In a third aspect, an embodiment of the present application provides a communication method, including: a first terminal device receives control information sent by a network device, and the control information is used to indicate SL resources; Correspondence, determining the service type applicable to the SL resource indicated by the control information, the service type including at least one of the following: broadcast service, unicast service, and multicast service; the first terminal device uses the control information The indicated SL resource sends data to the second terminal device, and the service type corresponding to the data is the same as the service type applicable to the SL resource indicated by the control information. The corresponding relationship is pre-configured by the network device for the first terminal device. After the first terminal device receives the control information sent by the network device, it can determine the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type, and then use the SL resource indicated by the control information Send data to the second terminal device, where the service type corresponding to the data is the same as the service type applicable to the SL resource. Therefore, this embodiment of the application can avoid the terminal equipment and network equipment from understanding deviations of the service type applicable to the same SL resource. Ensure SL communication between terminal devices.

In the first embodiment of the third aspect, the corresponding relationship is represented as a resource pool, the resource pool includes SL resources, and the resource pool is used to indicate the service type to which the SL resources contained therein are applicable. The resource pool is used to distinguish the applicable business types of SL resources.

In the second embodiment of the third aspect, the correspondence relationship is represented as a resource pool, the resource pool includes SL resources, and different SL resources in the resource pool are used to indicate service types applicable to the corresponding SL resources. The service type applicable to the SL resource is distinguished by the specific SL resource in the resource pool.

According to any of the foregoing embodiments of the third aspect, in the third embodiment of the third aspect, before the first terminal device receives the control information sent by the network device, the method further includes: the first terminal device sends To request the SL resource to the network device.

According to any of the foregoing embodiments of the third aspect, in the fourth embodiment of the third aspect, one type of service corresponds to at least one piece of control information.

In a fourth aspect, an embodiment of the present application provides a communication device, the communication device is a first terminal device, and the communication device includes: a receiving module and a sending module.

The receiving module is configured to receive control information sent by a network device, where the control information is used to indicate a side link SL resource and a service type to which the SL resource is applicable, and the service type includes at least one of the following: broadcast service , Unicast services and multicast services; a sending module, configured to use the SL resource to send data to the second terminal device, and the service type corresponding to the data is the same as the service type applicable to the SL resource. Since the control information is used to indicate the SL resource and the service type to which the SL resource is applicable, the embodiment of the present application can avoid the terminal device and the network device's understanding of the service type applicable to the same SL resource, and ensure the SL between the terminal devices Communication.

In the first embodiment of the fourth aspect, the format of the control information is used to indicate the service type to which the SL resource is applicable. Therefore, the first terminal device can directly obtain the service type applicable to the SL resource according to the control information, avoiding the misunderstanding of the service type applicable to the same SL resource by the terminal device and the network device, and ensuring the SL communication between the terminal devices.

According to the first embodiment of the fourth aspect, in the second embodiment of the fourth aspect, the format of the control information includes the length of the control information, and the length of the control information is used to indicate to which the SL resource is applicable business type. The length of control information is used to distinguish the types of services applicable to SL resources.

In a third embodiment of the fourth aspect, the control information includes indication information, and the indication information is used to indicate a service type to which the SL resource is applicable. The service types applicable to SL resources are distinguished by the control information contained in the control information. Optionally, the indication information may specifically be the radio network temporary identifier RNTI.

According to the third embodiment of the fourth aspect, in the fourth embodiment of the fourth aspect, the indication information is used to indicate whether the SL resource supports HARQ transmission, wherein the SL resource supports HARQ transmission and the SL resource supports HARQ transmission. The resource does not support HARQ transmission, respectively indicating different service types to which the SL resource applies.

According to the fourth embodiment of the fourth aspect, in the fifth embodiment of the fourth aspect, the SL resource supporting HARQ transmission is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service; The SL resource does not support HARQ transmission to indicate that the service type to which the SL resource is applicable is a broadcast service.

According to the third embodiment of the fourth aspect, in the sixth embodiment of the fourth aspect, the indication information is used to indicate the number of times the first terminal device uses the SL resource, wherein the number of times is used to indicate The service type to which the SL resource is applicable.

According to the sixth embodiment of the fourth aspect, in the seventh embodiment of the fourth aspect, the number of times greater than the preset number of times is used to indicate that the service type to which the SL resource applies is a broadcast service; the number of times is less than or equal to all The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the sixth embodiment of the fourth aspect, in the eighth embodiment of the fourth aspect, the number of times is greater than or equal to the preset number of times to indicate that the service type to which the SL resource is applicable is a broadcast service; The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the third embodiment of the fourth aspect, in the ninth embodiment of the fourth aspect, the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate to which SL resource is applicable Different business types.

In a tenth embodiment of the fourth aspect, the control information is scrambled control information, wherein different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable. The scrambling information is used to distinguish different service types applicable to SL resources.

According to any of the foregoing embodiments of the fourth aspect, in the eleventh embodiment of the fourth aspect, the sending module is further configured to: before the receiving module receives the control information sent by the network device, send a request for The SL resource message is sent to the network device.

According to any of the foregoing embodiments of the fourth aspect, in the twelfth embodiment of the fourth aspect, one type of service corresponds to at least one piece of control information.

It should be noted that the communication device in the fourth aspect described above may be a terminal device, or a chip that can be used in a terminal device.

In a fifth aspect, an embodiment of the present application provides a communication device, including a processing module and a sending module.

The processing module is configured to generate control information, the control information is used to indicate SL resources and service types to which the SL resources are applicable, and the service types include at least one of the following: broadcast services, unicast services, and group services. Broadcast service; the sending module is used to send the control information to the terminal device. Since the control information is used to indicate the SL resource and the service type to which the SL resource is applicable, the embodiment of the present application can avoid the terminal device and the network device's understanding of the service type applicable to the same SL resource, and ensure the SL between the terminal devices Communication.

In the first embodiment of the fifth aspect, the format of the control information is used to indicate the service type to which the SL resource is applicable. Therefore, the first terminal device can directly obtain the service type applicable to the SL resource according to the control information, avoiding the misunderstanding of the service type applicable to the same SL resource by the terminal device and the network device, and ensuring the SL communication between the terminal devices.

According to the first embodiment of the fifth aspect, in the second embodiment of the fifth aspect, the format of the control information includes the length of the control information, and the length of the control information is used to indicate to which the SL resource is applicable business type. The length of control information is used to distinguish the types of services applicable to SL resources.

In a third embodiment of the fifth aspect, the control information includes indication information, and the indication information is used to indicate a service type to which the SL resource is applicable. The service types applicable to SL resources are distinguished by the control information contained in the control information. Optionally, the indication information may specifically be the radio network temporary identifier RNTI.

According to the third embodiment of the fifth aspect, in the fourth embodiment of the fifth aspect, the indication information is used to indicate whether the SL resource supports HARQ transmission, wherein the SL resource supports HARQ transmission and the SL resource supports HARQ transmission. The resource does not support HARQ transmission, respectively indicating different service types to which the SL resource applies.

According to the fourth embodiment of the fifth aspect, in the fifth embodiment of the fifth aspect, the SL resource supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service; The SL resource does not support HARQ transmission to indicate that the service type to which the SL resource is applicable is a broadcast service.

According to a third embodiment of the fifth aspect, in the sixth embodiment of the fifth aspect, the indication information is used to indicate the number of times that the first terminal device uses the SL resource, wherein the number of times is used to indicate The service type to which the SL resource is applicable.

According to the sixth embodiment of the fifth aspect, in the seventh embodiment of the fifth aspect, the number of times greater than the preset number of times is used to indicate that the service type to which the SL resource applies is a broadcast service; the number of times is less than or equal to all The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the sixth embodiment of the fifth aspect, in the eighth embodiment of the fifth aspect, the number of times is greater than or equal to the preset number of times to indicate that the service type to which the SL resource is applicable is a broadcast service; The preset number of times is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

According to the third embodiment of the fifth aspect, in the ninth embodiment of the fifth aspect, the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate to which SL resources are applicable Different business types.

In the tenth embodiment of the fifth aspect, the control information is scrambled control information, wherein the different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable. The scrambling information is used to distinguish different service types applicable to SL resources.

According to any one of the foregoing embodiments of the fifth aspect, in an eleventh embodiment of the fifth aspect, the apparatus further includes: a receiving module, configured to receive a request for the SL before the processing module generates control information Resource message, the message is sent by the terminal device.

According to any of the foregoing embodiments of the fifth aspect, in the twelfth embodiment of the fifth aspect, one type of service corresponds to at least one piece of control information.

It should be noted that the communication device of the fifth aspect described above may be a network device or a chip that can be used for a network device.

In a sixth aspect, an embodiment of the present application provides a communication device, the communication device is a first terminal device, and the communication device includes: a receiving module, a processing module, and a sending module.

The receiving module is configured to receive control information sent by a network device, where the control information is used to indicate SL resources; and the processing module is configured to determine what the control information indicates based on the correspondence between the SL resources and the service type to which they are applicable The service type to which the SL resource is applicable, the service type includes at least one of the following: broadcast service, unicast service, and multicast service; the sending module is configured to use the SL resource indicated by the control information to send 2. The terminal device sends data, and the service type corresponding to the data is the same as the service type applicable to the SL resource indicated by the control information. The corresponding relationship is pre-configured by the network device for the first terminal device. After the first terminal device receives the control information sent by the network device, it can determine the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type, and then use the SL resource indicated by the control information Send data to the second terminal device, where the service type corresponding to the data is the same as the service type applicable to the SL resource. Therefore, this embodiment of the application can avoid the terminal equipment and network equipment from understanding deviations of the service type applicable to the same SL resource. Ensure SL communication between terminal devices.

In the first embodiment of the sixth aspect, the correspondence relationship is represented as a resource pool, the resource pool includes SL resources, and the resource pool is used to indicate the service type to which the SL resources contained therein are applicable. The resource pool is used to distinguish the applicable business types of SL resources.

In the second embodiment of the sixth aspect, the correspondence relationship is represented as a resource pool, the resource pool includes SL resources, and different SL resources in the resource pool are used to indicate service types applicable to the corresponding SL resources. The service type applicable to the SL resource is distinguished by the specific SL resource in the resource pool.

According to any of the foregoing embodiments of the sixth aspect, in the third embodiment of the sixth aspect, the sending module is further configured to: before the receiving module receives the control information sent by the network device, send a request for the SL Resource message to the network device.

According to any of the foregoing embodiments of the sixth aspect, in the fourth embodiment of the sixth aspect, one type of service corresponds to at least one piece of control information.

It should be noted that the communication device of the sixth aspect described above may be a terminal device or a chip that can be used in a terminal device.

In a seventh aspect, an embodiment of the present application provides a communication device, including: a memory and a processor.

Wherein, a computer program executable by the processor is stored on the memory;

When the processor reads and executes the computer program, the processor is caused to execute the method according to any one of the first aspect, the second aspect, or the third aspect.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program. The computer program includes at least one piece of code. Aspect or the communication method described in the embodiment of the present application in the second or third aspect.

In a ninth aspect, an embodiment of the present application provides a chip with a computer program stored on the chip. When the computer program is executed by a processor, it executes as in the first aspect, the second aspect, or the third aspect. The communication method described.

These and other aspects of the application will be more concise and understandable in the description of the following embodiment(s).

Description of the drawings

Figure 1 is a schematic diagram of a routing path of data exchanged between two terminal devices in a conventional wireless communication system;

Figure 2 is a schematic diagram of a routing path of data exchanged between two terminal devices in ProSe;

3 is a schematic diagram of another routing path of data exchanged between two terminal devices in ProSe;

Figure 4 is a schematic diagram of the positional relationship between two terminal devices in ProSe;

Figure 5 is a schematic diagram of data transmission in different SL services;

FIG. 6 is a schematic diagram of a communication system provided by an embodiment of this application;

FIG. 7 is a signaling diagram of a communication method provided by an embodiment of this application;

FIG. 8 is a signaling diagram of a communication method provided by another embodiment of this application;

FIG. 9 is a flowchart of a communication method provided by another embodiment of this application;

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of a communication device provided by another embodiment of this application;

FIG. 12 is a schematic structural diagram of a communication device provided by another embodiment of this application.

detailed description

It should be understood that the term "and/or" used in this article is only an association relationship describing associated objects, which means that there can be three relationships. For example, A and/or B can mean that there is A alone, and both A and B, there are three cases of B alone.

In the past 10 years, the LTE standard proposed by the 3GPP organization has been widely used all over the world, and is called 4G communication technology. For example, China Mobile, China Unicom, and China Telecom have adopted 4G LTE Time Division Duplexing (TDD) mode and Frequency Division Duplexing (FDD) mode transmission technologies, respectively, and provide users with High-speed and convenient mobile network service.

As the new generation of 5G technology enters the discussion stage, the consideration of whether the system structure and access process in the original 4GLTE standard will continue to be adopted is mainly from the following two directions: one direction, because the communication system is compatible with the latter, so The new technologies developed in the follow-up tend to be compatible with previously standardized technologies; on the other hand, as the 4GLTE standard already has a large number of existing designs, in order to achieve compatibility, a lot of 5G flexibility must be sacrificed, thereby reducing performance.

At present, the above two directions are studied in parallel in the 3GPP organization. In the two directions, the technical discussion group that does not consider backward compatibility is called NR. In the subject of NRRel-16, sidelink (SL) focuses on the communication method between terminal equipment and terminal equipment. Among them, SL supports three types of services: broadcast (broadcast) services, multicast (groupcast) services and unicast (unicast) services.

Referring to Fig. 1, in a conventional wireless communication system such as an LTE system, if data exchange is required between two terminal devices, the data routing path to be exchanged is: terminal device UE1<->base station eNB1<->core network equipment SGW/PGW<->base station eNB2<->terminal equipment UE2.

Different from conventional wireless communication systems, in order to implement device-to-device (D2D) technology, 3GPP also proposes a Proximity-based services (ProSe). Specifically, in order to implement ProSe, local routing is performed between two terminal devices through a base station. As shown in Figure 2, the data routing path exchanged is: terminal device UE1<-> base station eNB1<-> terminal device UE2; or, Two terminal devices can directly exchange data. As shown in Fig. 3, the data routing path for interaction is: terminal device UE1<->terminal device UE2. This kind of realization is SL communication, and SL communication is a specific technology to realize ProSe. It can be understood that SL communication supports direct data transmission between two terminal devices without using network devices, where the network devices include the aforementioned base station eNB1, base station eNB2, and core network equipment SGW/PGW. Since the terminal equipment UE1 and the terminal equipment UE2 directly interact, the data delay can be greatly reduced. However, due to the limited transmit power of terminal devices, SL communication is generally limited to communication between terminal devices that are relatively close.

For two terminal devices that implement ProSe, the positional relationship between the two can refer to Figure 4. Among them, Table 1 lists the positional relationship of the two terminal devices in each scenario shown in FIG. 4.

Table 1

It should be noted that the SL communication mentioned in the embodiment of the present application is applicable to D2D scenes and Vehicle-to-Everything (V2X) scenes, but is not limited to these scenes. Among them, all things connected with cars can also be called vehicle technology.

For example, in the V2X scenario of the LTE system, the terminal device has two modes (mode):

Mode 3, the network device allocates SL resources to the terminal device. This mode is often used in scenarios where terminal equipment is within the coverage of a cell;

mode 4, the terminal device independently selects SL resources, which can be used in scenarios where the terminal device is within the cell coverage and the terminal device is outside the cell coverage.

Since the solution involved in the embodiment of the present application is mainly that the network device in the NR system allocates SL resources to the terminal device, the following description is based on the prior art based on the network device in the LTE system allocating SL resources to the terminal device. It can be understood that the network device can allocate SL resources to the terminal device, indicating that the terminal device is within the coverage of the cell, that is, the terminal device is working in mode 3.

In mode 3, the process of a terminal device requesting SL resources is as follows:

Step 1: When the terminal device has the SL service arrival, the upper layer sends an instruction to the lower layer;

Step 2: The terminal device sends a Scheduling Request (SR) to a network device (such as an eNB) at the physical (PHY) layer to request uplink (UL) resources;

Step 3: The network device sends a physical downlink control channel (Physical Downlink Control Channel, PDCCH) to the terminal device, and allocates UL resources for uplink transmission;

Step 4: The terminal device sends the Physical Uplink Shared Channel (PUSCH) through the UL resource, which carries the BSR. The BSR belongs to the media access control (Media Access Control, MAC) layer signaling to notify the network device that it expects to perform SL Communication, request SL resources;

Step 5: The network device sends Downlink Control Information (DCI) to the terminal device, and allocates SL resources to the terminal device, so that the terminal device performs SL communication through the SL resource. Among them, DCI is carried by PDCCH.

As mentioned earlier, from the design of the physical layer, the SL in the NR system supports three types of services: broadcast services, groupcast services, and unicast services, which means that SL services include broadcast services. Multicast (groupcast) business and unicast (unicast) business. Among them, the broadcast service will follow the design concept of SL in the LTE system without feedback. The terminal device as the data sender first sends sidelink control information (Sidelink Control Infomation, SCI) to the terminal as the data receiver before sending data. Device, after that, transfer data. At this time, in order to ensure the reliability of data transmission, when transmitting data, there is a high probability that several repetitions will be sent, as shown in Figure 5; unicast services and multicast services will use hybrid automatic retransmission requests (Hybrid The Automatic Repeat Request (HARQ) retransmission method ensures the reliability of data transmission, that is, after one transmission, the receiving end feeds back to the transmitting end whether the transmission is correct, and if there is a negative acknowledgement (NACK) feedback from the receiving end, the transmitting end Perform data retransmission, as shown in Figure 5.

When the terminal device has both broadcast and unicast (or, broadcast and multicast) service requirements, when the terminal device requests SL resources from the network device, a BSR may carry information of multiple SL services. If the network device uses the above process of requesting SL resources by the terminal device when allocating SL resources, and does not indicate the service type corresponding to the allocated SL resource, then there may be a misunderstanding between the network device and the terminal device. The following situations:

Case 1: When a network device allocates SL resources to a terminal device, it indicates a repetition, or the size of the SL resource used for one HARQ transmission.

For example, a network device allocates a piece of SL resource to a terminal device. If the network device thinks that the SL resource is used for broadcast services and the terminal device thinks it is used for unicast or multicast services, the network device thinks that the terminal device will use the SL resource Perform several repeated transmissions of data, and the terminal device thinks that it can only use the SL resource to perform data transmission once. At this time, the network device will not allocate the last few uses of the SL resource to other terminal devices, which will cause a waste of SL resources.

Or conversely, the terminal device thinks that the SL resource is used for broadcast services, and the network device thinks it is used for unicast services or multicast services. At this time, the network device may allocate the last few uses of the SL resource to other terminal devices. Thereby causing potential interference to terminal equipment.

Case 2: When the network device allocates SL resources to the terminal device, the total resources for multiple transmissions are allocated at one time.

Because broadcast services and unicast services, or broadcast services and multicast services, occupy different patterns of SL resources, that is, the interval between repeated transmissions is different from the interval between two HARQ retransmissions. Therefore, the terminal equipment Still do not know how to use the SL resource, resulting in SL resource conflict.

Based on the foregoing problems, the embodiments of the present application provide a communication method, device, and storage medium. When a network device allocates SL resources to a terminal device, specify the service type to which the SL resource applies, so as to prevent the terminal device and the network device from sharing the same SL resource. To ensure the SL communication between terminal devices.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate the understanding of those skilled in the art:

Network equipment: also known as radio access network (Radio Access Network, RAN) equipment. It is a type of equipment that connects terminal equipment to the wireless network. It can be an evolutionary base station (Evolutional NodeB, eNB or eNodeB in the LTE system). ), or a relay station or access point, or a base station in a 5G network, such as a transmission and reception point (TRP), a controller, etc., which are not limited here.

Terminal equipment: It can be a wireless terminal or a wired terminal. A wireless terminal can refer to a device with wireless transceiver function. It can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as Ships, etc.); can also be deployed in the air (such as aircraft, balloons, satellites, etc.). The terminal device may be a mobile phone (mobilephone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) Wireless terminals in, self-driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, Wireless terminals in smart cities, wireless terminals in smart homes, etc. are not limited here.

Fig. 6 is an exemplary diagram of a communication system provided by an embodiment of the application. As shown in FIG. 6, the communication system 10 includes a network device 11, a network device 12 and at least two terminal devices. The at least two terminal devices include a terminal device 13 and a terminal device 14. The network device and the terminal device communicate through the following technical solutions provided in the embodiments of the present application. Among them, FIG. 6 shows that the terminal device 13 is the first terminal device, and FIG. 6 shows that the terminal device 14 is the second terminal device. The first terminal device and the second terminal device may be the same type of terminal device, or Different types of terminal devices, in which Figure 6 takes the first terminal device and the second terminal device both as smart phones as an example. In addition, the first terminal device may be a relay node for the second terminal device to communicate with the network device; the first terminal device is within the coverage area of the network device 12, and the second terminal device may be within the coverage area of the network device 12. It may also be outside the coverage area of the network device 12.

It should be noted that, in the following method embodiments, the first terminal device is used as a relay node, and the first terminal device and the second terminal device are both within the coverage of the network device as an example, but it is not limited to this. Unicast transmission is performed between the first terminal device and the second terminal device, or the first terminal device performs multicast transmission or broadcast transmission to a group of second terminal devices. The number of second terminal devices included in the group of second terminal devices here is at least two.

FIG. 7 is a signaling diagram of a communication method provided by an embodiment of this application. The embodiments of the present application provide a communication method, which may be executed by a communication device, and the communication device may be implemented by software and/or hardware. Exemplarily, the communication device may be integrated in the first terminal device or the communication device may be the first terminal device. As shown in Figure 7, the communication method includes:

S101. The network device generates control information.

Wherein, the control information is used to indicate the SL resource and the service type to which the SL resource is applicable. Further, the service type may include at least one of the following: broadcast service, unicast service, multicast service, and so on.

In practical applications, the control information may specifically be DCI, and the network device allocates SL resources to the terminal device through the DCI. In the existing LTE system, SL only supports broadcast services. Therefore, when network equipment allocates SL resources to terminal equipment, it is only necessary to notify the terminal equipment of the allocated SL resources through DCI; however, SL in the NR system supports broadcast services. In order to clarify the scope of use of SL resources, the three service types, groupcast service and unicast service, also need to indicate the service types applicable to the SL resource through DCI.

S102. The network device sends control information to the terminal device.

The terminal device in this step is the first terminal device as described above. The network device sends the control information to the terminal device, so that the terminal device knows the SL resource used for SL communication with other terminal devices and the service type applicable to the SL resource. Among them, the other terminal devices here are the second terminal devices mentioned herein.

Correspondingly, the first terminal device receives the control information sent by the network device.

S103. The first terminal device uses the SL resource to send data to the second terminal device.

Among them, the service type corresponding to the data is the same as the service type applicable to the SL resource.

It can be understood that if the control information indicates that the service type to which the SL resource applies is a broadcast service, the first terminal device uses the SL resource to send data corresponding to the broadcast service to the second terminal device; or if the control information indicates the service type to which the SL resource applies If it is a unicast service, the first terminal device uses the SL resource to send the data corresponding to the unicast service to the second terminal device; or, if the control information indicates that the service type to which the SL resource applies is a multicast service, the first terminal device uses The SL resource sends data corresponding to the multicast service to the second terminal device.

It should be noted that one service type corresponds to at least one control information. Exemplarily, when the first terminal device conducts unicast communication with the second terminal device, where the unicast communication involves unicast services, the data corresponding to the unicast services may have a large amount of data and require more SL resources. In this case, , The network device can allocate SL resources to the first terminal device through at least two DCIs, and the at least two DCIs are both used to indicate that the service type to which the SL resources are applicable is unicast. Similarly, the first terminal device and the second terminal device When the terminal device performs multicast communication or broadcast communication, it is similar to the unicast communication described above, and no further description is given here.

In addition, one piece of control information is only used to indicate one type of service. In other words, one control message cannot indicate two or more service types at the same time. For example, a DCI cannot be used to indicate both unicast services and broadcast services, and so on.

In this embodiment, the network device generates control information and sends it to the first terminal device. The control information is used to indicate the SL resource and the service type to which the SL resource applies. The service type includes at least one of the following: broadcast service, For unicast services and multicast services, the first terminal device uses the SL resource to send data to the second terminal device, where the service type corresponding to the data is the same as the service type applicable to the SL resource. Since the control information is used to indicate the SL resource and the service type that the SL resource is applicable to, the terminal device and the network device have the same understanding of the service type applicable to the same SL resource, thereby avoiding the terminal device and the network device from the same SL resource The understanding deviation of the applicable service type ensures the SL communication between terminal devices.

On the basis of the foregoing embodiment, how the control information indicates the service type to which the SL resource is applicable will be explained in several implementation manners below.

In the first implementation manner, the format of the control information is used to indicate the service type applicable to the SL resource. Those skilled in the art can understand that there are at least two formats of control information. When the formats of the control information are different, the service types to which the SL resources indicated are applicable are also different. For example, the control information includes control information in a first format and control information in a second format. The first format is used to indicate that the service type to which the SL resource is applicable is a broadcast service, and the second format is used to indicate that the service type that the SL resource is applicable to is Unicast service or multicast service, etc.; or, the control information includes control information in a first format, control information in a second format, and control information in a third format, where the first format is used to indicate the service to which SL resources are applicable The type is a broadcast service, the second format is used to indicate that the service type applicable to the SL resource is a unicast service, and the third format is used to indicate that the service type applicable to the SL resource is a multicast service.

Optionally, the format of the control information may include the length of the control information, and the length of the control information is used to indicate the service type to which the SL resource is applicable. Exemplarily, when the length of the control information is 40 bits, it is used to indicate that the service type applicable to the SL resource is a broadcast service, and when the length of the control information is 50 bits, it is used to indicate the service type applicable to the SL resource is Unicast service or multicast service; or, when the length of control information is 50 bits (bit), it is used to indicate that the service type applicable to SL resources is broadcast service, and when the length of control information is 40 bits, it is used to indicate SL The service type applicable to the resource is unicast service or multicast service. It is supplemented that the length value in the above example is only an example, and the embodiment of the present application is limited thereto.

Alternatively, the format of the control information may include the content of the control information, and the content of the control information is used to indicate the service type to which the SL resource is applicable. That is, when the length of the control information is the same, but the content of the control information is different (the meaning of the field is different), the service type to which the SL resource indicated is also different. For example, the control information in the first format and the control information in the second format have a length of 40 bits, but the last 10 bits of the control information in the first format may indicate resource allocation, and the last 10 bits of the control information in the second format May indicate the modulation method. If the length of the two control information is the same, the service type to which the SL resource is used to indicate is usually distinguished by a field in the two control information, for example, the first bit is 0 or 1 to distinguish Is it the control information in the first format or the control information in the second format.

Generally speaking, when the network equipment schedules the SL transmission of the broadcast service, compared with the network equipment schedules the SL transmission of the unicast service or the multicast service, the indicated content is likely to be different. For example, when a network device schedules the SL transmission of a unicast service or a multicast service, it may additionally indicate resources related to HARQ feedback, but when scheduling the SL transmission of a broadcast service, there is no such content. Therefore, the length of the control information in the two cases may be different, and it is also possible to design different control information formats.

In addition, considering that the first terminal device needs to perform blind detection before analyzing the DCI, in order to avoid increasing the complexity of the blind detection of the terminal device, the length of the DCI used to indicate different service types can be fixed, that is, the length of the fixed control information , Indicate the applicable service types of SL resources through the control information content and other methods.

This implementation uses the format of the control information to indicate the type of service applicable to the SL resource, so that the terminal device can learn the type of service applicable to the SL resource through the format of the control information, avoiding terminal equipment and network equipment from applying to the same SL resource Inconsistent understanding of service types, thereby avoiding resource waste and resource conflicts, and ensuring SL communication between terminal devices.

In the second implementation manner, the control information includes indication information, which is used to indicate the service type to which the SL resource is applicable.

In this implementation manner, in some embodiments, the indication information explicitly indicates the service type to which the SL resource is applicable. For example, an indication field is used in DCI to explicitly indicate whether the DCI allocates SL resources for broadcast services, or allocates SL resources for unicast services or multicast services, where DCI is control information, and the content contained in the indication field is indication information . Specifically, 1 bit can be used to indicate the service type to which the SL resource is applicable. For example, the content contained in this bit is '0' for broadcast services, and the content contained in this bit is '1' for unicast services or multicast services; or, You can also use 2 bits to indicate the service type to which the SL resource is applicable. For example, the content contained in the 2 bits is '00' for broadcasting services, the content contained in the 2 bits is '01' for unicast services, and the content contained in the 2 bits is "10" represents multicast services, and so on.

Optionally, since the length of the same control information is used, the complexity of blind detection of the terminal device can be reduced. Therefore, when the number of indication bits required by different SL services is different, the different SL services can be matched by padding. The length of the control information is aligned to the same length, such as padding 0 or padding 1.

In some embodiments, the indication information is used to indicate whether the SL resource supports HARQ transmission, where the SL resource supports HARQ transmission and the SL resource does not support HARQ transmission respectively indicate different service types to which the SL resource applies. Further, the SL resource supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service; the SL resource does not support HARQ transmission is used to indicate that the service type applicable to the SL resource is a broadcast service. For example, a 1-bit indication information can be used to indicate whether the SL resource supports HARQ transmission. For example, the content contained in this bit is '0', which means that the SL resource does not support HARQ transmission, which corresponds to broadcast services; the content contained in this bit is '1' 'On behalf of SL resources support HARQ transmission, on behalf of multicast services or unicast services. Here, the indication information indicates whether the SL resource supports HARQ transmission to implicitly indicate the service type to which the SL resource applies.

In some embodiments, the indication information is used to indicate the number of times the first terminal device uses the SL resource, where the number of times is used to indicate the service type to which the SL resource is applicable. Further, the number of times greater than the preset number is used to indicate that the service type applicable to the SL resource is a broadcast service; the number of times less than or equal to the preset number is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service. Alternatively, the number of times greater than or equal to the preset number is used to indicate that the service type applicable to the SL resource is a broadcast service; the number of times less than the preset number is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service. When the number of times is equal to the preset number of times, the number of times is used to indicate whether the service type applicable to the SL resource is a multicast service or a unicast service, or whether the service type applicable to the SL resource is a broadcast service, which can be set according to actual needs , The embodiment of this application does not limit it. Here, the number of times the first terminal device uses the SL resource indicated by the indication information implicitly indicates the service type to which the SL resource applies.

Exemplarily, when the indication information is used to indicate that the number of times the first terminal device uses the SL resource is 1, it means that there is no repeated transmission, that is, the service type to which the SL resource is applicable is a multicast service or a unicast service; when the indication information It is used to indicate that the number of times that the first terminal device uses the SL resource is greater than or equal to 2, indicating that there is repeated transmission, that is, the service type applicable to the SL resource is a broadcast service.

Or, consider a situation similar to the binding of Transmission Time Interval (TTI). Even if it is a multicast service or unicast service that supports HARQ transmission, the corresponding data may be sent more than once. A threshold K can be negotiated or configured by a higher layer. The repeated transmissions less than or equal to K are used to indicate that the service type applicable to the SL resource is multicast service or unicast service. The repeated transmissions greater than K are used to indicate the applicable service type of the SL resource. The service type is broadcast service. For example, by comparing the number of repeated transmissions included in the DCI with K, the first terminal device can distinguish the types of services to which the SL resources are applicable. Among them, the value of K can be set according to actual needs. Illustratively, the value of K can be 2.

In some embodiments, the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate different service types applicable to the SL resource. Here, the network device configures different resource pools for different SL services of the first terminal device, and implicitly indicates the service type to which the SL resource belongs by indicating the resource pool to which the SL resource belongs. The so-called resource pool is a logical concept. A resource pool includes multiple physical resources, and any physical resource is used to transmit data. When a terminal device performs data transmission, it needs to use a resource from the resource pool for transmission. There are two situations in this resource selection process, or called two working modes: one is that the terminal device is controlled by the network device, and according to the instruction information of the network device, a resource is selected from the resource pool for data transmission. For example, mode 3 in the LTE system and mode 1 in the NR system; second, the terminal device autonomously selects a resource from the resource pool for data transmission, such as mode 4 in the LTE system and mode 2 in the NR system. The embodiments of this application mainly relate to mode 1 in the NR system.

For example, the network device configures two resource pools for the first terminal device through broadcast or dedicated radio resource control (Radio Resource Control, RRC) signaling, where the SL resources in resource pool 0 are used for broadcast services, and the resource pool in resource pool 1 SL resources are used for multicast services or unicast services. When the network device allocates SL resources to the first terminal device through DCI, the indicated SL resource is located in resource pool 0, which means that the SL resource is used for broadcast service transmission; if the indicated SL resource is located in resource pool 1, then It means that the SL resource is used for the transmission of multicast services or unicast services.

Optionally, the foregoing control information may be scrambled control information, where different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable. For example, the first terminal device has two Radio Network Tempory Identity (RNTI): RNTI 1 and RNTI 2, where RNTI 1 is used for scrambling control information corresponding to broadcast services, and RNTI 2 is used for unicast services Or the scrambling of the control information corresponding to the multicast service. When the scrambling information used for the control information is RNTI 1, it is used to indicate that the service type applicable to the SL resource is the broadcast service; when the scrambling information used for the control information is RNTI 2 , Used to indicate that the service type applicable to the SL resource is unicast service or multicast service.

There is also a possibility: the above indication information may specifically be RNTI, or in other words, RNTI is not used for scrambling control information, but is included in control information. For example, the length of the control information is 40 bits, of which 10 bits are used to place the RNTI, and the first terminal device has two RNTIs: RNTI 1 and RNTI 2, where RNTI 1 is used to indicate that the service type applicable to SL resources is broadcast service. RNTI 2 is used to indicate that the service type applicable to SL resources is unicast service or multicast service. The terminal device reads the RNTI included in the control information to determine the service type to which the SL resource indicated by the control information applies. This method is similar to that the indication information in the control information is used to indicate whether the SL resource supports HARQ transmission, and it is also a way to implicitly indicate the service type to which the SL resource is applicable.

FIG. 8 is a signaling diagram of a communication method provided by another embodiment of this application. Referring to FIG. 8, based on the flow shown in FIG. 7, further, before S101, the network device generates control information, the communication method in the embodiment of the present application may further include:

S201: The first terminal device sends a message for requesting SL resources to the network device.

In this step, it may only include the first terminal device sending a piece of signaling to the network device, or it may include the process of multiple interactions between the first terminal device and the network device.

In this embodiment, after receiving the message for requesting the SL resource, the network device generates control information and sends the control information to the first terminal device. The control information is used to indicate the SL resource and the SL resource is applicable. The service type includes at least one of the following: broadcast service, unicast service, and multicast service. The first terminal device uses the SL resource to send data to the second terminal device, where the service type corresponding to the data is SL resources are applicable to the same business types. Since the control information is used to indicate the SL resource and the service type that the SL resource is applicable to, the terminal device and the network device have the same understanding of the service type applicable to the same SL resource, thereby avoiding the terminal device and the network device from the same SL resource The understanding deviation of the applicable service type ensures the SL communication between terminal devices.

FIG. 9 is a flowchart of a communication method provided by another embodiment of this application. Referring to Figure 9, the communication method includes:

S301: The first terminal device receives control information sent by the network device.

Wherein, the control information is used to indicate SL resources.

S302: The first terminal device determines the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type.

Wherein, the service type includes at least one of the following: broadcast service, unicast service and multicast service. The corresponding relationship is pre-configured by the network device for the first terminal device. Among them, one service type corresponds to at least one control information.

In one implementation, the corresponding relationship is represented as a resource pool, the resource pool contains SL resources, and the resource pool is used to indicate the type of business to which the SL resources contained therein are applicable. The resource pool is used to distinguish the applicable business types of SL resources. Exemplarily, if the network device configures two resource pools for the first terminal device through broadcast or dedicated radio resource control (Radio Resource Control, RRC) signaling, the SL resources in resource pool 0 are used for broadcast services, and the resource pool The SL resources in 1 are used for multicast services or unicast services. In this scenario, the above-mentioned control information may not be used to indicate the type of service to which the SL resources are applicable, that is, the control information and the existing SL resource request process in LTE The DCI used in is the same and is only used to indicate SL resources. After receiving the control information, the first terminal device parses the control information to obtain the indicated SL resources, and further determines where the SL resources are based on the resource pool configured by the network device The resource pool to determine the applicable business type of the SL resource.

Or, in another implementation, the corresponding relationship is represented as a resource pool, and the resource pool contains SL resources, and different SL resources in the resource pool are used to indicate the service types applicable to the corresponding SL resources, that is, through specific resources in the resource pool. SL resources to distinguish the types of services applicable to the SL resources. Exemplarily, if the network device configures a resource pool for the first terminal device through broadcast or dedicated RRC signaling, the resource pool includes SL resource 0 to SL resource 9, where SL resource 0 to SL resource 4 are used for broadcasting For services, SL resource 5 to SL resource 9 are used for multicast services or unicast services. In this scenario, the above-mentioned control information may not be used to indicate the service type to which the SL resource is applicable, that is, the control information is the same as that in the existing LTE The DCI used in the SL resource request process is the same and is only used to indicate the SL resource. After receiving the control information, the first terminal device parses the control information to obtain the SL resource indicated by it, and further determines according to the resource pool configured by the network device The type of business to which the SL resource applies. When the network device uses the control information to indicate the SL resource, it implicitly indicates the service type to which the SL resource applies.

S303. The first terminal device uses the SL resource indicated by the control information to send data to the second terminal device.

The service type corresponding to the data is the same as the service type applicable to the SL resource indicated by the control information.

In this embodiment, after the first terminal device receives the control information sent by the network device, it can determine the applicable service type of the SL resource indicated by the control information according to the correspondence between the SL resource and its applicable service type, and then use the control information The indicated SL resource sends data to the second terminal device, where the service type corresponding to the data is the same as the service type applicable to the SL resource. Therefore, the embodiment of the present application can avoid the service applicable to the same SL resource by the terminal device and the network device The type of understanding deviation ensures the SL communication between terminal devices.

On the basis of the foregoing embodiment, optionally, before the first terminal device receives the control information sent by the network device in S301, the communication method may further include: the first terminal device sends a message for requesting the SL resource to The network equipment.

Next, in combination with actual application scenarios, the above-mentioned communication methods provided in the embodiments of the present application are explained.

A typical application scenario is the fleet scenario. For example, vehicle A, vehicle B, and vehicle C form a fleet, where vehicle A is the lead vehicle and all three vehicles are within the coverage of base station X, that is, vehicle A is the first terminal device, and base station X is network equipment. Both vehicle B and vehicle C are second terminal devices. Vehicle A may need to send a broadcast signal to the outside (broadcast transmission between vehicle A and vehicle B and vehicle C, corresponding to the broadcast service), and the broadcast signal contains information about the movement state of vehicle A itself. After the broadcast signal is received by surrounding vehicles, pedestrians, roadside fixed equipment, etc., it can be used to avoid collisions. In addition, vehicle A may need to send a multicast signal to vehicle B and vehicle C (vehicle A and vehicle B, and vehicle C perform multicast transmission, corresponding to the multicast service), and the multicast signal contains the information of the movement path of the vehicle fleet to avoid vehicles Fall behind. Or, vehicle A may also need to send a unicast signal to vehicle B (vehicle A and vehicle B perform unicast transmission, corresponding to unicast services). The unicast signal may contain video, text messages or other APP interactive information for Communication between vehicle A and vehicle B. In the above scenario, vehicle A may have service requirements for broadcast services, multicast services, and unicast services at the same time. At this time, vehicle A sends a message for requesting SL resources to base station X; after base station X receives the message, in response to the message, base station X generates control information, which is used to indicate SL resources and to which SL resources are applicable Service type, the service type includes: at least one of broadcast service, unicast service and multicast service; base station X sends the control information to vehicle A; after vehicle A receives the control information, it uses the SL indicated by the control information The resource sends data to vehicle B and/or vehicle C, and the service type corresponding to the data is the same as the service type to which the SL resource indicated by the control information applies.

In addition, since one service type corresponds to at least one piece of control information, and vehicle A may have service requirements for broadcast services, multicast services, and unicast services at the same time, there may be at least one control information generated by base station X, and each control information Used to indicate a type of business.

It can be understood that, in the foregoing embodiments, the methods or steps implemented by the terminal device may also be implemented by a chip that can be used for the terminal device. The method or step implemented by the network device may also be implemented by a chip that can be used for the network device.

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application. The communication device may be a terminal device, or a chip that can be used for a terminal device, and the terminal device may serve as the first terminal device. As shown in FIG. 10, the communication device 20 of this embodiment includes: a receiving module 21 and a sending module 22.

The receiving module 21 is used to receive control information sent by a network device. Among them, the control information is used to indicate the SL resource and the service type to which the SL resource is applicable. The service type includes at least one of the following: broadcast service, unicast service, and multicast service.

The sending module 22 is configured to use SL resources to send data to the second terminal device. Among them, the service type corresponding to the data is the same as the service type applicable to the SL resource.

Since the control information is used to indicate the SL resource and the service type to which the SL resource is applicable, the embodiment of the present application can avoid the terminal device and the network device's understanding of the service type applicable to the same SL resource, and ensure the SL between the terminal devices Communication.

Optionally, the sending module 22 may also be used to send a message for requesting the SL resource to the network device before the receiving module 21 receives the control information sent by the network device.

The communication device described above in this embodiment can be used to execute the technical solutions executed by the first terminal device/first terminal device chip in the corresponding method embodiments above. The implementation principles and technical effects are similar, and the functions of each module can be Refer to the corresponding description in the method embodiment, which will not be repeated here.

In some embodiments, in terms of hardware implementation, the above-mentioned receiving module 21 and sending module 22 may be embedded in the processor in the form of hardware. Alternatively, in terms of hardware implementation, the above-mentioned receiving module 21 may be a receiver, and the above-mentioned sending module 22 may be a transmitter, wherein the receiver and the transmitter may be integrated as a transceiver.

Correspondingly, the communication device of this embodiment may further include a memory, which is used to store a computer program executable by the processor; when the processor reads and executes the computer program, the processor is caused to execute the communication method as described above.

The computer program can be implemented in the form of a software functional unit and can be sold or used as an independent product, and the memory can be any form of computer readable storage medium. Based on this understanding, all or part of the technical solution of the present application can be embodied in the form of a software product, including several instructions to enable a computer device, specifically a processor, to execute the first in each embodiment of the present application. All or part of the steps of the terminal device. The aforementioned computer-readable storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other various programs that can store programs The medium of the code.

FIG. 11 is a schematic structural diagram of a communication device provided by another embodiment of this application. The communication device can be a network device, or a chip that can be used in a network device. As shown in FIG. 11, the communication device 30 of this embodiment includes: a processing module 31 and a sending module 32.

The processing module 31 is used to generate control information. Among them, the control information is used to indicate the SL resource and the service type to which the SL resource is applicable. The service type includes at least one of the following: broadcast service, unicast service, and multicast service.

The sending module 32 is used to send control information to the terminal device.

Optionally, the communication device 30 further includes: a receiving module (not shown), configured to receive a message for requesting the SL resource before the processing module 31 generates control information. The message is sent by the terminal device.

The communication device described above in this embodiment can be used to execute the technical solutions executed by the network device/chip in the network device in the corresponding method embodiments above. The implementation principles and technical effects are similar. The functions of each module can be implemented with reference to the method. The corresponding description in the example will not be repeated here.

In some embodiments, in terms of hardware implementation, the aforementioned processing module 31, sending module 32, and receiving module may be embedded in the processor in the form of hardware. Alternatively, in terms of hardware implementation, the above-mentioned processor 31 may be a processor, the above-mentioned sending module 32 may be a transmitter, and the above-mentioned receiving module may be a receiver, where the receiver and the transmitter may be integrated as a transceiver.

The computer program can be implemented in the form of a software functional unit and can be sold or used as an independent product, and the memory can be any form of computer readable storage medium. Based on this understanding, all or part of the technical solution of the present application can be embodied in the form of a software product, including several instructions to enable a computer device, specifically a processor, to execute the first in each embodiment of the present application. All or part of the steps of the terminal device. The aforementioned computer-readable storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk, or optical disk and other media that can store program codes.

On the basis of the embodiment corresponding to the structure shown in FIG. 10 or FIG. 11:

Optionally, the format of the control information is used to indicate the service type to which the SL resource is applicable. Therefore, the first terminal device can directly obtain the service type applicable to the SL resource according to the control information, avoiding the misunderstanding of the service type applicable to the same SL resource by the terminal device and the network device, and ensuring the SL communication between the terminal devices.

Further, the format of the control information may include the length of the control information. Among them, the length of the control information is used to indicate the type of service applicable to the SL resource. The length of control information is used to distinguish the types of services applicable to SL resources.

Optionally, the control information may include indication information, which is used to indicate the service type to which the SL resource is applicable. The service types applicable to SL resources are distinguished by the control information contained in the control information. Further, the indication information may specifically be an identifier such as RNTI.

In some embodiments, the indication information is used to indicate whether the SL resource supports HARQ transmission. Among them, the SL resource supports HARQ transmission and the SL resource does not support HARQ transmission respectively indicating different service types to which the SL resource applies.

Wherein, the SL resource supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service; the SL resource does not support HARQ transmission is used to indicate that the service type applicable to the SL resource is a broadcast service.

In some embodiments, the indication information is used to indicate the number of times the first terminal device uses the SL resource, where the number of times is used to indicate the service type to which the SL resource is applicable.

Wherein, the number of times greater than the preset number is used to indicate that the service type applicable to the SL resource is a broadcast service; the number of times less than or equal to the preset number is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

Alternatively, the number of times greater than or equal to the preset number is used to indicate that the service type applicable to the SL resource is a broadcast service; the number of times less than the preset number is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service.

In some embodiments, the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate different service types applicable to the SL resource.

Optionally, the control information may be scrambled control information. Among them, the different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable. The scrambling information is used to distinguish different service types applicable to SL resources.

In the foregoing embodiment, one service type corresponds to at least one control information.

FIG. 12 is a schematic structural diagram of a communication device provided by another embodiment of this application. The communication device may be a terminal device, or a chip that can be used for a terminal device, and the terminal device may serve as the first terminal device. As shown in FIG. 12, the communication device 40 of this embodiment includes: a receiving module 41, a processing module 42, and a sending module 43.

The receiving module 41 is used to receive control information sent by a network device. Wherein, the control information is used to indicate SL resources.

The processing module 42 is configured to determine the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type. Wherein, the service type includes at least one of the following: broadcast service, unicast service and multicast service.

The sending module 43 is configured to send data to the second terminal device using the SL resource indicated by the control information. The service type corresponding to the data is the same as the service type applicable to the SL resource indicated by the control information. The corresponding relationship is pre-configured by the network device for the first terminal device.

After the first terminal device receives the control information sent by the network device, it can determine the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type, and then use the SL resource indicated by the control information Send data to the second terminal device, where the service type corresponding to the data is the same as the service type applicable to the SL resource. Therefore, this embodiment of the application can avoid the terminal equipment and network equipment from understanding deviations of the service type applicable to the same SL resource. Ensure SL communication between terminal devices.

Optionally, the foregoing corresponding relationship may be expressed as a resource pool, and the resource pool contains SL resources, and the resource pool is used to indicate the service type to which the SL resources contained therein are applicable. The resource pool is used to distinguish the applicable business types of SL resources.

Alternatively, the above-mentioned corresponding relationship may be expressed as a resource pool, the resource pool contains SL resources, and different SL resources in the resource pool are used to indicate service types applicable to the corresponding SL resources. The service type applicable to the SL resource is distinguished by the specific SL resource in the resource pool.

Further, the sending module 43 may also be used to send a message for requesting the SL resource to the network device before the receiving module 41 receives the control information sent by the network device.

It should be noted that one service type corresponds to at least one control information.

The communication device described above in this embodiment can be used to execute the technical solutions executed by the chip of the first terminal device/first terminal device in the corresponding method embodiments above. The implementation principles and technical effects are similar, and the functions of each module You can refer to the corresponding description in the method embodiment, which will not be repeated here.

In some embodiments, in terms of hardware implementation, the above-mentioned receiving module 41, processing module 42, and sending module 43 may be embedded in the processor in the form of hardware. Alternatively, in terms of hardware implementation, the above-mentioned processing module 42 may be a processor, the above-mentioned receiving module 41 may be a receiver, and the above-mentioned sending module 43 may be a transmitter, wherein the receiver and the transmitter may be integrated as a transceiver.

It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.

If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or 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 a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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

Claims

A communication method, characterized in that the method includes:

The first terminal device receives control information sent by the network device, where the control information is used to indicate a side link SL resource and a service type to which the SL resource is applicable, and the service type includes at least one of the following: broadcast service, Unicast service and multicast service;

The first terminal device uses the SL resource to send data to the second terminal device, and the service type corresponding to the data is the same as the service type applicable to the SL resource.
The method according to claim 1, wherein the format of the control information is used to indicate the service type to which the SL resource is applicable.
The method according to claim 2, wherein the format of the control information includes the length of the control information, and the length of the control information is used to indicate the service type to which the SL resource is applicable.
The method according to claim 1, wherein the control information includes indication information, and the indication information is used to indicate a service type to which the SL resource is applicable.
The method according to claim 4, wherein the indication information is used to indicate whether the SL resource supports HARQ transmission, wherein the SL resource supports HARQ transmission and the SL resource does not support HARQ transmission. HARQ transmission respectively indicates different service types applicable to the SL resources.
The method according to claim 5, wherein the SL resource supports HARQ transmission and is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service;

The SL resource not supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a broadcast service.
The method according to claim 4, wherein the indication information is used to indicate the number of times that the first terminal device uses the SL resource, wherein the number of times is used to indicate the type of service to which the SL resource applies .
The method according to claim 7, wherein the number of times greater than the preset number of times is used to indicate that the service type to which the SL resource is applicable is a broadcast service;

The number of times being less than or equal to the preset number of times is used to indicate that the service type to which the SL resource applies is a multicast service or a unicast service.
The method according to claim 4, wherein the indication information is used to indicate a resource pool to which the SL resource belongs, and different resource pools are used to indicate different service types applicable to the SL resource.
The method according to claim 1, wherein the control information is scrambled control information, wherein different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable.
The method according to any one of claims 1 to 10, wherein before the first terminal device receives the control information sent by the network device, the method further comprises:

The first terminal device sends a message for requesting the SL resource to the network device.
The method according to any one of claims 1 to 11, wherein one type of service corresponds to at least one piece of control information.
A communication method, characterized in that the method includes:

The network device generates control information, the control information is used to indicate the side link SL resource and the service type to which the SL resource is applicable, and the service type includes at least one of the following: broadcast service, unicast service, and multicast service business;

The network device sends the control information to the terminal device.
The method according to claim 13, wherein the format of the control information is used to indicate the service type to which the SL resource is applicable.
The method according to claim 14, wherein the format of the control information includes the length of the control information, and the length of the control information is used to indicate the service type to which the SL resource is applicable.
The method according to claim 13, wherein the control information includes indication information, and the indication information is used to indicate a service type to which the SL resource is applicable.
The method according to claim 16, wherein the indication information is used to indicate whether the SL resource supports HARQ transmission with hybrid automatic repeat request, wherein the SL resource supports HARQ transmission and the SL resource does not support HARQ transmission. HARQ transmission respectively indicates different service types applicable to the SL resources.
The method according to claim 17, wherein the SL resource supports HARQ transmission and is used to indicate that the service type applicable to the SL resource is a multicast service or a unicast service;

The SL resource not supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a broadcast service.
The method according to claim 16, wherein the indication information is used to indicate the number of times the terminal device uses the SL resource, wherein the number of times is used to indicate the type of service to which the SL resource is applicable.
The method according to claim 19, wherein the number of times greater than the preset number of times is used to indicate that the service type to which the SL resource is applicable is a broadcast service;

The number of times being less than or equal to the preset number of times is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service.
The method according to claim 16, wherein the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate different service types applicable to the SL resource.
The method according to claim 13, wherein the control information is scrambled control information, wherein different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable.
The method according to any one of claims 13 to 22, wherein before the network device generates control information, the method further comprises:

The network device receives a message for requesting the SL resource, and the message is sent by a terminal device.
The method according to any one of claims 13 to 23, wherein one type of service corresponds to at least one piece of control information.
A communication method, characterized in that it comprises:

The first terminal device receives control information sent by the network device, where the control information is used to indicate SL resources;

The first terminal device determines the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type, and the service type includes at least one of the following: broadcast service, unicast Business and multicast business;

The first terminal device uses the SL resource indicated by the control information to send data to the second terminal device, and the service type corresponding to the data is the same as the service type applicable to the SL resource indicated by the control information.
The method of claim 25, wherein:

The corresponding relationship is represented as a resource pool, the resource pool contains SL resources, and the resource pool is used to indicate the type of service to which the SL resources contained therein are applicable.
The method of claim 25, wherein:

The corresponding relationship is represented as a resource pool, and the resource pool contains SL resources, and different SL resources in the resource pool are used to indicate service types applicable to the corresponding SL resources.
The method according to any one of claims 25 to 27, characterized in that, before the first terminal device receives the control information sent by the network device, the method further comprises:

The first terminal device sends a message for requesting the SL resource to the network device.
A communication device, characterized by comprising:

An apparatus for receiving control information sent by a network device, where the control information is used to indicate a side link SL resource and a service type to which the SL resource is applicable, and the service type includes at least one of the following: broadcast service, Unicast service and multicast service;

An apparatus for sending data to a second terminal device using the SL resource, where the service type corresponding to the data is the same as the service type applicable to the SL resource.
The communication device according to claim 29, wherein the format of the control information is used to indicate a service type to which the SL resource is applicable.
The communication device according to claim 30, wherein the format of the control information includes the length of the control information, and the length of the control information is used to indicate the service type to which the SL resource is applicable.
The communication device according to claim 29, wherein the control information comprises indication information, and the indication information is used to indicate a service type to which the SL resource is applicable.
The communication device according to claim 32, wherein the indication information is used to indicate whether the SL resource supports HARQ transmission of hybrid automatic repeat request, wherein the SL resource supports HARQ transmission and is different from the SL resource. Supporting HARQ transmission respectively indicates different service types to which the SL resources are applicable.
The communication device according to claim 33, wherein the SL resource supports HARQ transmission and is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service;

The SL resource not supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a broadcast service.
The communication device according to claim 32, wherein the indication information is used to indicate the number of times the SL resource is used, wherein the number of times is used to indicate a service type to which the SL resource is applicable.
The communication device according to claim 35, wherein the number of times greater than a preset number of times is used to indicate that the service type to which the SL resource is applicable is a broadcast service;

The number of times being less than or equal to the preset number of times is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service.
The communication device according to claim 32, wherein the indication information is used to indicate the resource pool to which the SL resource belongs, and different resource pools are used to indicate different service types applicable to the SL resource.
The communication device according to claim 29, wherein the control information is scrambled control information, wherein different scrambling information of the control information is used to indicate different service types to which the SL resources are applicable.
The communication device according to any one of claims 29 to 39, further comprising:

An apparatus for sending a message for requesting the SL resource to the network device before receiving the control information sent by the network device.
The communication device according to any one of claims 29 to 39, wherein one type of service corresponds to at least one piece of control information.
A communication device, characterized by comprising:

A device for generating control information, where the control information is used to indicate a side link SL resource and a service type to which the SL resource is applicable, and the service type includes at least one of the following: broadcast service, unicast service, and Multicast service;

A device for sending the control information to a terminal device.
The communication device according to claim 41, wherein the format of the control information is used to indicate a service type to which the SL resource is applicable.
The communication device according to claim 42, wherein the format of the control information includes the length of the control information, and the length of the control information is used to indicate the type of service to which the SL resource is applicable.
The communication device according to claim 41, wherein the control information comprises indication information, and the indication information is used to indicate a service type to which the SL resource is applicable.
The communication device according to claim 44, wherein the indication information is used to indicate whether the SL resource supports HARQ transmission of hybrid automatic repeat request, wherein the SL resource supports HARQ transmission and is different from the SL resource. Supporting HARQ transmission respectively indicates different service types to which the SL resources are applicable.
The communication device according to claim 45, wherein the SL resource supports HARQ transmission and is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service;

The SL resource not supporting HARQ transmission is used to indicate that the service type applicable to the SL resource is a broadcast service.
The communication device according to claim 44, wherein the indication information is used to indicate the number of times the terminal device uses the SL resource, wherein the number of times is used to indicate a service type to which the SL resource is applicable.
The communication device according to claim 47, wherein the number of times greater than the preset number of times is used to indicate that the service type to which the SL resource is applicable is a broadcast service;

The number of times being less than or equal to the preset number of times is used to indicate that the service type to which the SL resource is applicable is a multicast service or a unicast service.
The communication device according to claim 44, wherein the indication information is used to indicate a resource pool to which the SL resource belongs, and different resource pools are used to indicate different service types to which the SL resource belongs.
The communication device according to claim 41, wherein the control information is scrambled control information, and different scrambling information of the control information is used to indicate different service types to which the SL resource is applicable.
The communication device according to any one of claims 41 to 50, further comprising:

It is used to receive a message for requesting the SL resource before generating the control information, and the message is sent by the terminal device.
The communication device according to any one of claims 41 to 51, wherein one type of service corresponds to at least one piece of control information.
A communication device, characterized by comprising:

A device for receiving control information sent by a network device, where the control information is used to indicate SL resources;

A device for determining the applicable service type of the SL resource indicated by the control information according to the corresponding relationship between the SL resource and the applicable service type, and the service type includes at least one of the following: broadcast service, unicast service and Multicast service;

An apparatus for sending data to the second terminal device using the SL resource indicated by the control information, and the service type corresponding to the data is the same as the service type applicable to the SL resource indicated by the control information.
The communication device according to claim 53, wherein:

The corresponding relationship is represented as a resource pool, the resource pool contains SL resources, and the resource pool is used to indicate the type of service to which the SL resources contained therein are applicable.
The communication device according to claim 53, wherein:

The corresponding relationship is represented as a resource pool, the resource pool includes SL resources, and different SL resources in the resource pool are used to indicate service types applicable to the corresponding SL resources.
The communication device according to any one of claims 53 to 55, further comprising:

An apparatus for sending a message for requesting the SL resource to the network device before receiving the control information sent by the network device.
A communication device characterized by comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the program to implement The method according to any one of 12, or the method according to any one of claims 13-24, or the method according to any one of claims 25-28.
A device, characterized in that the device comprises a processor, the processor is configured to be coupled with a memory, and read instructions in the memory and execute according to the instructions as described in any one of claims 1 to 12 Method, or execute the method according to any one of claims 13 to 24 according to the instruction, or execute the method according to any one of claims 25 to 28 according to the instruction.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1 to 12, or execute the method according to any one of claims 13 to 24 The method of any one, or the method of any one of claims 25-28.
A computer program product, characterized in that, when it runs on a computer, it causes the computer to execute the method according to any one of claims 1 to 12, or causes the computer to execute any one of claims 13 to 24 The method, or the computer is caused to execute the method according to any one of claims 25 to 28.
A chip, characterized in that it is connected to a memory or includes a memory, and is used to read and execute a software program stored in the memory to implement the method according to any one of claims 1 to 12, or to implement The method according to any one of claims 13 to 24, or to implement the method according to any one of claims 25 to 28.
A communication system includes: a network device, a first terminal device, and a second terminal device;

The network device generates control information, the control information is used to indicate the side link SL resource and the service type to which the SL resource applies, and the service type includes at least one of the following: broadcast service, unicast service, and multicast service Business; sending the control information to the terminal device;

The first terminal device receives the control information sent by the network device; and uses the SL resource to send data to the second terminal device, and the service type corresponding to the data is the same as the service type applicable to the SL resource.
A communication system includes: a network device, a first terminal device, and a second terminal device;

The network device generates control information, where the control information is used to indicate a side link SL resource; sends the control information to the terminal device;

The first terminal device receives the control information sent by the network device; according to the corresponding relationship between the SL resource and the applicable service type, determines the applicable service type of the SL resource indicated by the control information, and the service type includes at least one of the following : Broadcast service, unicast service, and multicast service; use the SL resource indicated by the control information to send data to the second terminal device, and the service type corresponding to the data is the same as the applicable service type for the SL resource indicated by the control information .