Wireless communication method and terminal device

A radio communication method and a terminal device are provided. In a D2D communications system, the terminal device may determine an RAT for transmitting data, so as to ensure reliable transmission of the data. The method is applied to device-to-device communication through a PC5 carrier comprising obtaining configuration information indicates a correspondence between identifier of services and at least one Radio Access Technology (RAT) that comprises a plurality of access layer parameters, determining, at least one access layer parameter for transmitting a first service according to the configuration information, wherein the first service belongs to the at least one service, and transmitting the first service by using the at least one access layer parameter.

BACKGROUND OF THE INVENTION

Technical Field

This application relates to the communications field, and more specifically, to a radio communication method, a terminal device, and a network device.

Related Art

In a device-to-device (D2D) communications system, a terminal device (for example, a vehicle-mounted terminal) may perform data transmission with a network device on an uplink through a Uu carrier and perform data transmission with other terminals on a sidelink through a PC5 carrier.

To ensure data transmission, the terminal device further needs to determine a Radio Access Technology (RAT) for transmitting data. However, there is no determinate solution yet to resolve the problem of how the terminal device determines the RAT for transmitting data.

SUMMARY OF THE INVENTION

Embodiments of this application provide a radio communication method, a terminal device, and a network device. In a D2D communications system, the terminal device may determine an RAT for transmitting data, so as to ensure reliable transmission of the data.

According to a first aspect, an embodiment of this application provides a radio communication method applied to device-to-device communication, the method including determining, by a terminal device according to configuration information, a Radio Access Technology (RAT) for transmitting a first service, where the configuration information indicates a correspondence between at least one service and at least one RAT, and the first service belongs to the at least one service.

Therefore, in the radio communication method according to this embodiment of this application, the terminal device may determine, according to the configuration information indicating the correspondence between the at least one service and the at least one RAT, the RAT for transmitting the first service, so as to ensure reliable transmission of data of the first service.

Optionally, in an implementation of the first aspect, the configuration information is specifically configured to indicate a correspondence between an identifier of the at least one service and the at least one RAT.

Optionally, in an implementation of the first aspect, the identifier of the at least one service is a Provider Service Identifier (PSID) or an Intelligent Transportation System Application Identifier (ITS-AID).

Optionally, in an implementation of the first aspect, the configuration information is specifically configured to indicate a correspondence between a Prose Per-Packet Priority (PPPP) of the at least one service and the at least one RAT.

Optionally, in an implementation of the first aspect, the RAT is an RAT for a first-type carrier, and/or, an RAT for a second-type carrier, where the first-type carrier is configured to transmit data on an uplink, and the second-type carrier is configured to transmit data on a sidelink.

Optionally, in an implementation of the first aspect, the RAT includes a plurality of access layer parameters, and the plurality of access layer parameters is at least one of the following: whether 64 quadrature amplitude modulation (64QAM) is used for modulation, whether transmit diversity is used for transmission, and whether carrier aggregation is used for transmission.

Optionally, in an implementation of the first aspect, the terminal device is an access layer of the terminal device, and before the terminal device determines, according to the configuration information, the RAT for transmitting the first service, the method further includes receiving, by the access layer of the terminal device, the configuration information from a higher layer of the terminal device.

Optionally, in an implementation of the first aspect, before the terminal device determines, according to the configuration information, the RAT for transmitting the first service, the method further includes receiving, by the terminal device, the configuration information from a network device.

According to a second aspect, an embodiment of this application provides a radio communication method applied to device-to-device communication, the method including sending, by a network device, configuration information to a terminal device, so that the terminal device determines, according to the configuration information, a Radio Access Technology (RAT) for transmitting a first service, where the configuration information indicates a correspondence between at least one service and at least one RAT, and the first service belongs to the at least one service.

Therefore, in the radio communication method according to this embodiment of this application, the network device configures, for the terminal device, the configuration information indicating the correspondence between the at least one service and the at least one RAT, so that the terminal device may determine, according to the configuration information, the RAT for transmitting the first service, so as to ensure reliable transmission of data of the first service.

Optionally, in an implementation of the second aspect, the configuration information is specifically configured to indicate a correspondence between an identifier of the at least one service and the at least one RAT.

Optionally, in an implementation of the second aspect, the identifier of the at least one service is a PSID or an ITS-AID.

Optionally, in an implementation of the second aspect, the configuration information is specifically configured to indicate a correspondence between a PPPP of the at least one service and the at least one RAT.

Optionally, in an implementation of the second aspect, the RAT is an RAT for a first-type carrier, and/or, an RAT for a second-type carrier, where the first-type carrier is configured to transmit data on an uplink and/or a downlink, and the second-type carrier is configured to transmit data on a sidelink.

Optionally, in an implementation of the second aspect, the RAT includes a plurality of access layer parameters, and the plurality of access layer parameters is at least one of the following: whether 64QAM is used for modulation, whether transmit diversity is used for transmission, and whether carrier aggregation is used for transmission.

According to a third aspect, an embodiment of this application provides a terminal device, including modules or units that can perform the method according to the first aspect or any optional implementation of the first aspect.

According to a fourth aspect, an embodiment of this application provides a network device, including modules or units that can perform the method according to the second aspect or any optional implementation of the second aspect.

According to a fifth aspect, a terminal device is provided, including a processor, a memory, and a communications interface. The processor is connected to the memory and the communications interface. The memory is configured to store an instruction, the processor is configured to execute the instruction, and the communications interface is configured to communicate with another network element under the control of the processor. When the processor executes the instruction stored in the memory, the execution causes the processor to perform the method according to the first aspect or any possible implementation of the first aspect.

According to a sixth aspect, a network device is provided, including a processor, a memory, and a communications interface. The processor is connected to the memory and the communications interface. The memory is configured to store an instruction, the processor is configured to execute the instruction, and the communications interface is configured to communicate with another network element under the control of the processor. When the processor executes the instruction stored in the memory, the execution causes the processor to perform the method according to the second aspect or any possible implementation of the second aspect.

According to a seventh aspect, a computer storage medium is provided, where the computer storage medium stores program code, and the program code is configured to instruct a computer to execute instructions of the method according to the foregoing aspects.

According to an eighth aspect, a computer program product including an instruction is provided, and the computer program product, when run on a computer, causes the computer to perform the method according to the foregoing aspects.

DETAILED DESCRIPTION OF THE INVENTION

The technical solutions in embodiments of this application are described clearly and completely with reference to the accompanying drawings in the embodiments of this application below.

It should be understood that, the technical solutions in the embodiments of this application may be applied to a device-to-device (D2D) communications system, for example, an Internet of Vehicles system that performs D2D communication based on Long Term Evolution (LTE). Different from a method in a conventional LTE system in which communication data is received or sent between terminals through a network device (for example, a base station), the Internet of Vehicles system uses a device-to-device direct communication method, and therefore has higher spectral efficiency and a lower transmission delay.

Optionally, a communications system on which the Internet of Vehicles system is based may be a Global System of Mobile Communication (GSM), a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), an LTE system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunication System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communications system, a 5G New Radio (NR) system, and the like.

The terminal device in the embodiments of this application may be a terminal device that may implement D2D communication. For example, the terminal device may be a vehicle-mounted terminal device, or may be a terminal device in a 5G network, a terminal device in a future evolved Public Land Mobile Network (PLMN), or the like, which is not limited by the embodiments of this application.

FIG.1andFIG.2are each a schematic diagram of an application scenario according to an embodiment of this application.FIG.1shows an example including a network device and two terminal devices. Optionally, a radio communications system in the embodiments of this application may include a plurality of network devices, and another quantity of terminal devices may be included within the coverage of each network device, which is not limited by the embodiments of this application.

Optionally, the radio communications system may further include other network entities such as a mobile management entity (MME), a serving gateway (S-GW), and a packet data network gateway (P-GW), or the radio communications system may further include other network entities such as a session management function (SMF), unified data management (UDM), and an authentication server function (AUSF), which is not limited by the embodiments of this application.

Specifically, a terminal device20and a terminal device30may communicate through a D2D communications mode. When performing D2D communication, the terminal device20and the terminal device30directly communicate through a D2D link, that is, a sidelink (SL). As shown inFIG.1orFIG.2, the terminal device20and the terminal device30directly communicate through the sidelink. InFIG.1, the terminal device20and the terminal device30communicate through the sidelink, and a transmission resource is allocated by the network device. InFIG.2, the terminal device20and the terminal device30communicate through the sidelink, the transmission resource is autonomously selected by the terminal device, and the network device does not need to allocate the transmission resource.

D2D communication may be vehicle-to-vehicle (V2V for short) communication or vehicle-to-everything (V2X) communication. In V2X communication, X may generally refer to any device having a radio receiving and sending capability, for example, but not limited to, a radio apparatus moving at a low speed, an in-vehicle device moving at a high speed, or a network control node having a radio transmitting and receiving capability. It should be understood that the embodiments of the present invention are mainly applied to a V2X communication scenario, and may be also applied to any other D2D communication scenario, which is not limited by the embodiments of this application.

In an internet of vehicles system, there may be two types of terminal devices: a terminal device with a sensing capability, such as vehicle user equipment (VUE) or pedestrian user equipment (PUE), and a terminal device without a sensing capability, such as a PUE. The VUE has a higher processing capability and is generally powered by a battery in the vehicle, while a processing capability of the PUE is lower; power consumption reduction is also a main factor that needs to be considered for the PUE. Therefore, in an existing internet of vehicles system, the VUE is considered as having full receiving and listening capabilities, while the PUE is considered as having partial or no receiving and listening capabilities. If the PUE has a partial listening capability, the PUE may select a resource by using a listening method similar to that of the VUE, that is, an available resource is selected from partial resources that the PUE can listen on. If the PUE has no listening capability, the PUE selects a transmission resource randomly from a resource pool.

In addition, aspects or features of this application may be implemented as a method, an apparatus or a product that uses standard programming and/or engineering technologies. The term “product” used in this application covers a computer program that can be accessed from any computer-readable device, carrier or medium. For example, a computer-readable medium may include, but is not limited to: a magnetic storage device (such as a hard disk, a floppy disk, or a magnetic tape), an optical disc (such as a compact disk (CD), or a digital versatile disc (DVD)), a smartcard and a flash memory device (such as an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive). In addition, various storage media described in this specification may indicate one or more devices and/or other machine-readable media that are used to store information. The term “machine-readable media” may include, but is not limited to, various media that can store, contain, and/or carry an instruction and/or data.

It should be understood that, terms “system” and “network” in this specification are usually interchangeably used in this specification. The term “and/or” in this specification describes only an association relationship for describing associated objects and represents that three relationships may exist. For example, A and/or B may represent the following three cases: Only A exists, both A and B exist, and only B exists. In addition, the character “/” in this specification generally indicates an “or” relationship between the associated objects.

FIG.3is a schematic flowchart of a radio communication method200according to an embodiment of this application. As shown inFIG.3, the method200is applied to device-to-device communication. The method200may be performed by a terminal device. The terminal device may be the terminal device shown inFIG.1orFIG.2. The method200includes the content:

210. The terminal device determines, according to configuration information, an RAT for transmitting a first service.

The configuration information indicates a correspondence between at least one service and at least one RAT, and the first service belongs to the at least one service.

For example, the RAT for transmitting the first service is an RAT for a 5-Generation New Radio (5G NR) communications network.

For another example, the RAT for transmitting the first service is an RAT for an LTE communications network.

Optionally, the configuration information is configured for a correspondence between the first service and the at least one RAT.

For example, the configuration information indicates that the first service corresponds to an RAT 1.

For another example, the configuration information indicates that the first service corresponds to the RAT 1 and an RAT 2.

Optionally, the configuration information is configured for the correspondence between the at least one service and the at least one RAT.

For example, as shown inFIG.1, the first service is a service b, and corresponds to the RAT 1.

Optionally, the configuration information is specifically configured to indicate a correspondence between an identifier of the at least one service and the at least one RAT.

For example, an identifier of a service is A, and the configuration information indicates that the service A corresponds to the RAT 1.

Optionally, the identifier of the at least one service is a PSID or an ITS-AID.

Optionally, the configuration information is specifically configured to indicate a correspondence between a PPPP of the at least one service and the at least one RAT.

For example, the configuration information indicates that data of a service PSID A and a service PPPP3corresponds to the RAT 1, and data of the service PSID A and a service PPPP2corresponds to the RAT 2.

Optionally, the RAT is an RAT for a first-type carrier, and/or, an RAT for a second-type carrier, where the first-type carrier is configured to transmit data on an uplink, and the second-type carrier is configured to transmit data on a sidelink.

Optionally, the first-type carrier may be a Uu carrier, and the second-type carrier may be a PC5 carrier.

Optionally, the RAT includes a plurality of access layer parameter, and the plurality of access layer parameters is at least one of the following: whether 64QAM is used for modulation, whether transmit diversity is used for transmission, and whether carrier aggregation is used for transmission.

Optionally, an access layer of the terminal device receives the configuration information from a higher layer of the terminal device.

Optionally, the configuration information may be preconfigured in the higher layer of the terminal device, or may be dynamically configured in the higher layer of the terminal device by a network device.

Optionally, the terminal device receives the configuration information from the network device.

Therefore, in the radio communication method according to this embodiment of this application, the terminal device may determine, according to the configuration information indicating the correspondence between the at least one service and the at least one RAT, the RAT for transmitting the first service, so as to ensure reliable transmission of data of the first service.

FIG.4is a schematic flowchart of a radio communication method300according to an embodiment of this application. As shown inFIG.4, the method300is applied to device-to-device communication. The method300may be performed by a network device. The network device may be the network device shown inFIG.1. The method300includes the following content:

310. The network device sends configuration information to a terminal device, so that the terminal device determines, according to the configuration information, an RAT for transmitting a first service.

The configuration information indicates a correspondence between at least one service and at least one RAT, and the first service belongs to the at least one service.

Optionally, the configuration information is specifically configured to indicate a correspondence between an identifier of the at least one service and the at least one RAT.

Optionally, the identifier of the at least one service is a PSID or an ITS-AID.

Optionally, the configuration information is specifically configured to indicate a correspondence between a PPPP of the at least one service and the at least one RAT.

Optionally, the RAT is an RAT for a first-type carrier, and/or, an RAT for a second-type carrier, where the first-type carrier is configured to transmit data on an uplink and/or a downlink, and the second-type carrier is configured to transmit data on a sidelink.

Optionally, the RAT includes a plurality of access layer parameters, and the plurality of access layer parameters is at least one of the following: whether 64QAM is used for modulation, whether transmit diversity is used for transmission, and whether carrier aggregation is used for transmission.

It should be understood that, for the steps in the radio communication method300, reference may be made to the descriptions of corresponding steps in the radio communication method200. For brevity, details are not described herein again.

Therefore, in the radio communication method according to this embodiment of this application, the network device configures the configuration information indicating the correspondence between the at least one service and the at least one RAT for the terminal device, so that the terminal device may determine, according to the configuration information, the RAT for transmitting the first service, so as to ensure reliable transmission of data of the first service.

FIG.5is a schematic block diagram of a terminal device400according to an embodiment of this application. As shown inFIG.5, the terminal device400is applied to device-to-device communication, and the terminal device400includes a processing unit410, configured to determine, according to configuration information, a Radio Access Technology (RAT) for transmitting a first service.

The configuration information indicates a correspondence between at least one service and at least one RAT, and the first service belongs to the at least one service.

Optionally, the configuration information is specifically configured to indicate a correspondence between an identifier of the at least one service and the at least one RAT.

Optionally, the identifier of the at least one service is a Provider Service Identifier (PSID) or an Intelligent Transportation System Application Identifier (ITS-AID).

Optionally, the configuration information is specifically configured to indicate a correspondence between a Prose Per-Packet Priority (PPPP) of the at least one service and the at least one RAT.

Optionally, the RAT is an RAT for a first-type carrier, and/or, an RAT for a second-type carrier, where the first-type carrier is configured to transmit data on an uplink, and the second-type carrier is configured to transmit data on a sidelink.

Optionally, the RAT includes a plurality of access layer parameters, and the plurality of access layer parameters is at least one of the following whether quadrature amplitude modulation 64QAM is used for modulation, whether transmit diversity is used for transmission, and whether carrier aggregation is used for transmission.

Optionally, the terminal device is an access layer of the terminal device, and before the processing unit410determines, according to the configuration information, the RAT for transmitting the first service, the terminal device400further includes a receiving unit420, configured to receive the configuration information from a higher layer of the terminal device.

Optionally, before the processing unit410determines, according to the configuration information, the RAT for transmitting the first service, the terminal device400further include a receiving unit420, configured to receive the configuration information from a network device.

It should be understood that, the terminal device400may correspond to the terminal device in the method embodiment, and may implement corresponding operations implemented by the terminal device in the method embodiment. For brevity, details are not described herein again.

FIG.6is a schematic block diagram of a network device500according to an embodiment of this application. As shown inFIG.6, the network device500is applied to device-to-device communication, and the network device500include a sending unit510, configured to send configuration information to a terminal device, so that the terminal device determines, according to the configuration information, a Radio Access Technology (RAT) for transmitting a first service.

The configuration information indicates a correspondence between at least one service and at least one RAT, and the first service belongs to the at least one service.

Optionally, the configuration information is specifically configured to indicate a correspondence between an identifier of the at least one service and the at least one RAT.

Optionally, the identifier of the at least one service is a Provider Service Identifier (PSID) or an Intelligent Transportation System Application Identifier (ITS-AID).

Optionally, the configuration information is specifically configured to indicate a correspondence between a Prose Per-Packet Priority (PPPP) of the at least one service and the at least one RAT.

Optionally, the RAT is an RAT for a first-type carrier, and/or, an RAT for a second-type carrier, where the first-type carrier is configured to transmit data on an uplink and/or a downlink, and the second-type carrier is configured to transmit data on a sidelink.

Optionally, the RAT includes a plurality of access layer parameters, and the plurality of access layer parameters is at least one of the following whether quadrature amplitude modulation 64QAM is used for modulation, whether transmit diversity is used for transmission, and whether carrier aggregation is used for transmission.

It should be understood that, the network device500may correspond to the network device in the method embodiment, and may implement corresponding operations implemented by the network device in the method embodiment. For brevity, details are not described herein again.

FIG.7is a schematic structural diagram of a system chip600according to an embodiment of this application. The system chip600inFIG.7includes an input interface601, an output interface602, a processor603and a memory604that may be connected to each other through an internal communications connection line, and the processor603is configured to execute code in the memory604.

Optionally, when the code is executed, the processor603implements the method performed by the terminal device in the method embodiments. For brevity, details are not described herein again.

Optionally, when the code is executed, the processor603implements the method performed by the network device in the method embodiment. For brevity, details are not described herein again.

FIG.8is a schematic block diagram of a radio communication device700according to an embodiment of this application. As shown inFIG.8, the communication device700includes a processor710and a memory720. The memory720may store program code, and the processor710may execute the program code stored in the memory720.

Optionally, as shown inFIG.8, the communication device700may include a transceiver730, and the processor710may control the transceiver730to communicate with the outside.

Optionally, the processor710may invoke the program code stored in the memory720, to perform corresponding operations of the terminal device in the method embodiment, and for brevity, details are not described herein again.

Optionally, the processor710may invoke the program code stored in the memory720, to perform corresponding operations of the network device in the method embodiment, and for brevity, details are not described herein again.

It can be understood that, the memory in the embodiments of this application may be a volatile memory or a non-volatile memory, or may include both a volatile memory and a non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), and is used as an external cache. Through exemplary but not limitative description, many forms of RAMs may be used, for example, a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synchlink DRAM (SLDRAM) and a direct rambus RAM (DR RAM). It should be noted that, the memory for the system and the method described herein aims to include but not limited to these memories and any other suitable types of memories.