CN114698041B - Wireless communication method and device - Google Patents

Abstract

The embodiment of the application provides a wireless communication method, which comprises the following steps: the method comprises the steps that a first base station sends first information to a second base station, wherein the first information is used for PC5 interface communication of a first terminal before a process of switching from the first base station to the second base station; the first base station receives first PC5 resource information, wherein the first PC5 resource information is used for representing first PC5 resources, and the first PC5 resources are used for PC5 interface communication of the first terminal in the process of switching from the first base station to the second base station; the first base station transmits the first PC5 resource information to the first terminal. Based on the above scheme, the second base station can allocate the first PC5 resource for communication to the first terminal under the condition of acquiring the first information of the first terminal, so that the condition that the PC5 resource allocated by the second base station is unsuitable is avoided.

Description

A wireless communication method and device thereof

Technical Field

The present application relates to the field of communications, and in particular to a wireless communication method and device thereof.

Background technique

In order to enrich the functions of mobile networks, mobile networks have added support for V2X communication. With the development of the next generation of mobile networks, future V2X communication can support more vehicle networking application scenarios, including vehicle teaming, sensor expansion, remote driving and enhanced autonomous driving. V2X communication can adopt two communication methods: V2X communication method based on the Uu interface and V2X communication based on the PC5 interface. Among them, V2X communication based on the PC5 interface uses the communication resources of the PC5 interface, which can also be called side link resources. The side link resources are allocated by the base station.

At present, when the base station allocates side link resources to the V2X UE, it is unable to obtain the QoS requirement information of the V2X UE's services. Therefore, it may happen that the allocated resources cannot meet the communication needs of the V2X UE. In addition, due to the mobility of the vehicle, cell switching may occur frequently during the driving of the vehicle, so multiple base stations are required to coordinate resources to allocate side link resources to the V2X UE. Multiple cells can use side link resources in the same frequency band. This can avoid the problem of frequent resource switching due to the mobility of the vehicle, and also reduce the communication signaling overhead of the side link. Therefore, this application designs a method to achieve side link resource optimization during the switching process of the PC5 interface.

Summary of the invention

The embodiment of the present application provides a wireless communication method and apparatus thereof, so that the second base station (target base station) can configure PC5 communication resources for the destination cell for the terminal device in advance during the process of the terminal device switching the base station, so as to avoid the problem that the PC5 resources allocated to the terminal device when switching to the target base station may not meet the PC5 communication requirements between the terminal devices due to the inability of the target base station to obtain the PC5 interface information of the terminal device.

In a first aspect, the present application provides a method for wireless communication, the method comprising: a first base station sends first information to a second base station, the first information being used for a first terminal to perform PC5 interface communication before switching from the first base station to the second base station; the first base station receives first PC5 resource information, the first PC5 resource information being used to characterize a first PC5 resource, the first PC5 resource being used for the first terminal to perform PC5 interface communication during switching from the first base station to the second base station; the first base station sends the first PC5 resource information to the first terminal.

Through the above technical solution, the first base station sends the PC5 interface information of the first terminal (including QoS information, SLRB configuration, physical layer channel resource information, communication mode, etc.) to the second base station, so that the second base station can configure the PC5 communication resources for the destination cell for the first terminal in advance during the switching process of the first terminal, avoiding the problem that the PC5 resources allocated by the second base station after the switching may not meet the PC5 communication requirements between terminal devices.

In combination with the first aspect, in some implementations of the first aspect, the first PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station.

Specifically, when the first PC5 resource includes only one PC5 resource for the first terminal to perform PC5 interface communication during the switching of base stations, the resource is selected for communication; when the first PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication during the switching of base stations, one PC5 resource is determined for communication according to factors such as the quality and priority of each PC5 resource in the first PC5 resource. The specific determination method is not limited in this application.

In combination with the first aspect, in certain implementations of the first aspect, the first information includes at least one of the following information: PC5 QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize a second PC5 resource, and the second PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

In combination with the first aspect, in certain implementations of the first aspect, the first base station sends first information, including: the first base station sends a first request message to the second base station, the first request message includes the first information, and the first request message is used to request to switch the first terminal from the first base station to the second base station; the first base station receives first PC5 resource information, including: the first base station receives a first request response message from the second base station, and the first request response message includes the first PC5 resource information.

In combination with the first aspect, in certain implementations of the first aspect, the first base station sends first information, including: the first base station sends a second request message to the access and mobility management node, the second request message includes the first information, and the second request message is used to request to switch the first terminal from the first base station to the second base station; the first base station receives first PC5 resource information, including: the first base station receives the second request response message from the access and mobility management node, and the second request response message includes the first PC5 resource information.

Through the above technical solution, by forwarding the first information between the first base station and the second base station by the access and mobility management node, the second base station can obtain the first information sent by the first base station and prepare corresponding PC5 communication resources for the first terminal in advance.

In combination with the first aspect, in some implementations of the first aspect, the first base station receives the first information from the first terminal.

In combination with the first aspect, in some implementations of the first aspect, the first base station sends indication information to the first terminal, where the indication information is used to instruct to report the first information.

In a second aspect, a method for wireless communication is provided, the method comprising: a second base station receives first information, the first information is used for a first terminal to perform PC5 interface communication before switching from the first base station to the second base station; the second base station sends first PC5 resource information based on the first information, the first PC5 resource information is used to characterize a first PC5 resource, and the first PC5 resource is used for the first terminal to perform PC5 interface communication during switching from the first base station to the second base station.

Through the above technical solution, the second base station receives the PC5 interface information of the first terminal (including QoS information, SLRB configuration, physical layer channel resource information, communication mode, etc.), so that the second base station can configure the PC5 communication resources for the destination cell for the first terminal in advance during the switching process of the first terminal, avoiding the problem that the PC5 resources allocated by the second base station after the switching may not meet the PC5 communication requirements between terminal devices.

In combination with the second aspect, in certain implementations of the second aspect, the first information includes at least one of the following: PC5QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize a second PC5 resource, and the second PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

In combination with the second aspect, in some implementations of the second aspect, the first PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station.

In combination with the second aspect, in some implementations of the second aspect, the second base station sends the first PC5 resource information according to the first information, including: the second base station allocates the first PC5 resource to the first terminal according to the first information; the second base station sends the first PC5 resource information.

Through the above solution, the second base station allocates the first PC5 resource information to the first terminal when learning the first information of the first terminal, thereby avoiding the problem that the second base station configures the first terminal with inappropriate PC5 resource information.

In combination with the second aspect, in certain implementations of the second aspect, the first information includes the PC5 QoS information and the second PC5 resource information, and the second base station allocates the first PC5 resource to the first terminal based on the first information, including: the second base station determines the third PC5 resource information based on the PC5 QoS information of the first terminal, and the third PC5 resource information is used to characterize the third PC5 resource; the second base station allocates the first PC5 resource to the first terminal based on the second PC5 resource information and the third PC5 resource, and the first PC5 resource is included in the second PC5 resource and the third PC5 resource.

It should be understood that the third PC5 resource information is the PC5 resource information generated by the second base station based on the first information. The first PC5 resource can be the intersection of the second PC5 resource information and the third PC5 resource information, or it can be the third PC5 resource information and part of the second PC5 resource information. This application does not limit this.

In combination with the second aspect, in certain implementations of the second aspect, the first information includes the second PC5 resource information, and the second base station allocates the first PC5 resource to the first terminal based on the first information, including: the second base station allocates the first PC5 resource to the first terminal based on the second PC5 resource information, and the first PC5 resource is included in the second PC5 resource.

In combination with the second aspect, in certain implementations of the second aspect, the second base station receives the first information, including: the second base station receives the first request information from the first base station, the first request message includes the first information, and the first request message is used to request to switch the first terminal from the first base station to the second base station; the second base station sends the first PC5 resource information based on the first information, including: the second base station sends the first request response message to the first base station based on the first information, and the first request response message includes the first PC5 resource information.

In combination with the second aspect, in certain implementations of the second aspect, the second base station receives first information, including: the second base station receives a second request message from the access and mobility management node, the second request message includes the first information, and the second request message is used to request to switch the first terminal from the first base station to the second base station; the second base station sends first PC5 resource information based on the first information, including: the second base station sends a second request response message to the access and mobility management node based on the first information, and the second request response message includes the first PC5 resource information.

In combination with the second aspect, in certain implementations of the second aspect, the second base station receives the PC5 QoS information from the first terminal, and the PC5 QoS information is used by the first terminal to perform PC5 interface communication before the process of switching from the first base station to the second base station; the second base station sends fourth PC5 resource information to the first terminal based on the PC5 QoS information, and the fourth PC5 resource information is used to characterize a fourth PC5 resource, and the fourth PC5 resource information is used by the first terminal to perform PC5 interface communication after the process of switching from the first base station to the second base station.

In combination with the second aspect, in some implementations of the second aspect, the fourth PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication after a process of switching from the first base station to the second base station.

In combination with the second aspect, in some implementations of the second aspect, the fourth PC5 resource includes the first PC5 resource.

In a third aspect, a method for wireless communication is provided, the method comprising: a first terminal receives first PC5 resource information from a first base station, the first PC5 resource information is used to characterize a first PC5 resource, and the first PC5 resource is used by the first terminal to perform PC5 interface communication during a process of switching from the first base station to a second base station; the first terminal performs PC5 interface communication during a process of switching from the first base station to the second base station based on the first PC5 resource information.

Through the above technical solution, the first terminal receives the first PC5 resource information sent by the first base station. The PC5 resource information is the PC5 communication resource for the destination cell configured for the first terminal by the second base station according to the PC5 interface information of the first terminal (including QoS information, SLRB configuration, physical layer channel resource information, communication method, etc.), thereby avoiding the problem that the PC5 resources allocated by the second base station after switching may not meet the PC5 communication requirements between terminal devices.

In combination with the third aspect, in certain implementations of the third aspect, when the first PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication during switching from the first base station to the second base station, the first terminal performs PC5 interface communication during switching from the first base station to the second base station based on the first PC5 resource information, including: the first terminal selects a PC5 resource from the first PC5 resources; the first terminal uses the selected PC5 resource to perform PC5 interface communication during switching from the first base station to the second base station.

Specifically, when the first PC5 resource includes only one PC5 resource for the first terminal to perform PC5 interface communication during the switching of base stations, the resource is selected for communication; when the first PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication during the switching of base stations, one PC5 resource is determined for communication according to factors such as the quality and priority of each PC5 resource in the first PC5 resource. The specific determination method is not limited in this application.

In combination with the third aspect, in certain implementations of the third aspect, the first terminal sends first information to the first base station, where the first information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

In combination with the third aspect, in certain implementations of the third aspect, the first terminal receives indication information from the first base station, where the indication information is used to instruct to report the first information.

In combination with the third aspect, in certain implementations of the third aspect, the first terminal sends target resource information to the second terminal, where the target resource information is used to represent the selected PC5 resource.

In combination with the third aspect, in certain implementations of the third aspect, the first terminal sends PC5QoS information to the second base station, and the PC5 QoS information is used by the first terminal to perform PC5 interface communication before the process of switching from the first base station to the second base station; the first terminal receives fourth PC5 resource information from the second base station, and the fourth PC5 resource information is used to characterize a fourth PC5 resource, and the fourth PC5 resource information is used by the first terminal to perform PC5 interface communication after the process of switching from the first base station to the second base station.

In combination with the third aspect, in certain implementations of the third aspect, the fourth PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication after a process of switching from the first base station to the second base station.

Specifically, when the fourth PC5 resource includes only one PC5 resource for the first terminal to perform PC5 interface communication after completing the switching of the base station, the resource is selected for communication; when the fourth PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication after completing the switching of the base station, one PC5 resource is determined for communication according to the quality, priority and other factors of each PC5 resource in the fourth PC5 resource. The specific determination method is not limited in this application.

In combination with the third aspect, in some implementations of the third aspect, the fourth PC5 resource includes the first PC5 resource.

In a fourth aspect, a wireless communication device is provided, the device comprising:

A sending module is used to send first information to a second base station, where the first information is used for a first terminal to perform PC5 interface communication before switching from the first base station to the second base station; a receiving module is used to receive first PC5 resource information, where the first PC5 resource information is used to characterize a first PC5 resource, where the first PC5 resource is used for the first terminal to perform PC5 interface communication during switching from the first base station to the second base station; the sending module is also used to send the first PC5 resource information to the first terminal.

Based on the beneficial effects of the above-mentioned solution, reference may be made to the corresponding description of the first aspect, and for the sake of brevity, this application will not go into details here.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the first PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the first information includes at least one of the following information: PC5 QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize a second PC5 resource, and the second PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the sending module is specifically used to: send a first request message to the second base station, the first request message including the first information, the first request message being used to request that the first terminal be switched from the first base station to the second base station; and receive a first request response message from the second base station, the first request response message including the first PC5 resource information.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the sending module is also specifically used to: send a second request message to the access and mobility management node, the second request message including the first information, and the second request message being used to request that the first terminal be switched from the first base station to the second base station; and receive the second request response message from the access and mobility management node, the second request response message including the first PC5 resource information.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the receiving module is further specifically used to: receive the first information from the first terminal.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the sending module is further specifically used to: send indication information to the first terminal, where the indication information is used to instruct to report the first information.

In a fifth aspect, a wireless communication device is provided, which includes: a receiving module for receiving first information, wherein the first information is used for a first terminal to perform PC5 interface communication before switching from a first base station to a second base station; a sending module for sending first PC5 resource information according to the first information, wherein the first PC5 resource information is used to characterize a first PC5 resource, and the first PC5 resource is used for the first terminal to perform PC5 interface communication when switching from the first base station to the second base station.

Based on the beneficial effects of the above-mentioned solution, reference may be made to the corresponding description of the second aspect. For the sake of brevity, this application will not go into details here.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the first information includes at least one of the following: PC5QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize a second PC5 resource, and the second PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the first PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station.

In combination with the fifth aspect, in some implementations of the fifth aspect, the device further includes: a processing module, configured to allocate the first PC5 resource to the first terminal according to the first information; and the sending module, configured to send the first PC5 resource information.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the processing module is also used to determine third PC5 resource information based on the PC5QoS information, and the third PC5 resource information is used to characterize the third PC5 resource; based on the second PC5 resource information and the third PC5 resource, the first PC5 resource is allocated to the first terminal, and the first PC5 resource is included in the second PC5 resource and the third PC5 resource.

In combination with the fifth aspect, in some implementations of the fifth aspect, the processing module is further used to allocate the first PC5 resource to the first terminal according to the second PC5 resource information, and the first PC5 resource is included in the second PC5 resource.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the receiving module is also used to: receive the first request information from the first base station, the first request message includes the first information, and the first request message is used to request to switch the first terminal from the first base station to the second base station; the sending module is also used to send a first request response message to the first base station based on the first information, and the first request response message includes the first PC5 resource information.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the receiving module is also used to: receive a second request message from the access and mobility management node, the second request message including the first information, the second request message being used to request that the first terminal be switched from the first base station to the second base station; the sending module is also used to send a first request response message to the first base station based on the first information, the first request response message including the first PC5 resource information.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the receiving module is further used to: receive the PC5 QoS information from the first terminal, the PC5 QoS information is used by the first terminal to perform PC5 interface communication before the process of switching from the first base station to the second base station; the sending module is further used to send fourth PC5 resource information to the first terminal based on the PC5 QoS information, the fourth PC5 resource information is used to characterize a fourth PC5 resource, and the fourth PC5 resource information is used by the first terminal to perform PC5 interface communication after the process of switching from the first base station to the second base station.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the fourth PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication after a process of switching from the first base station to the second base station.

In combination with the fifth aspect, in some implementations of the fifth aspect, the fourth PC5 resource includes the first PC5 resource.

In a sixth aspect, a wireless communication device is provided, the device comprising:

The receiving module is used to receive first PC5 resource information from the first base station, where the first PC5 resource information is used to represent a first PC5 resource, and the first PC5 resource is used for the first terminal to perform PC5 interface communication during switching from the first base station to the second base station.

Based on the beneficial effects of the above-mentioned solution, reference may be made to the corresponding description of the third aspect. For the sake of brevity, this application will not go into details here.

In combination with the sixth aspect, in certain implementations of the sixth aspect, when the first PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication during the process of switching from the first base station to the second base station, the device also includes: a processing module, used to select a PC5 resource from the first PC5 resources; and use the selected PC5 resource to perform PC5 interface communication during the process of switching from the first base station to the second base station.

In combination with the sixth aspect, in certain implementations of the sixth aspect, the sending module is specifically used to: send first information to the first base station, and the first information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

In combination with the sixth aspect, in certain implementations of the sixth aspect, the receiving module is further specifically used to: receive indication information from the first base station, where the indication information is used to instruct to report the first information.

In conjunction with the sixth aspect, in certain implementations of the sixth aspect, the sending module is further specifically used to: send target resource information to the second terminal, the target resource information being used to characterize the selected PC5 resource.

In combination with the sixth aspect, in certain implementations of the sixth aspect, the sending module is further specifically used to send PC5 QoS information to the second base station, and the PC5 QoS information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station; the receiving module is further specifically used to receive fourth PC5 resource information from the second base station, and the fourth PC5 resource information is used to characterize a fourth PC5 resource, and the fourth PC5 resource information is used for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station.

In combination with the sixth aspect, in certain implementations of the sixth aspect, the fourth PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication after a process of switching from the first base station to the second base station.

In combination with the sixth aspect, in some implementations of the sixth aspect, the fourth PC5 resource includes the first PC5 resource.

In a seventh aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the communication method in any possible implementation of the first to third aspects and the first to third aspects. Optionally, the communication device also includes a memory. Optionally, the communication device also includes a communication interface, the processor is coupled to the communication interface, and the communication interface is used to input and/or output information. The information includes at least one of an instruction and data.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input/output interface, an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

In another implementation, the communication device is a chip or a chip system configured in a terminal device.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In an eighth aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the communication method in any possible implementation of the first to third aspects and the first to third aspects. Optionally, the communication device also includes a memory. Optionally, the communication device also includes a communication interface, the processor is coupled to the communication interface, and the communication interface is used to input and/or output information. The information includes at least one of an instruction and data.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

In another implementation, the communication device is a chip or a chip system configured in a network device.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In a ninth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a communication device, the communication device implements the communication method in the first aspect to the third aspect, and any possible implementation method of the first aspect to the third aspect.

In a tenth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a communication device, the communication device implements the communication method in the first aspect to the third aspect, and any possible implementation method of the first aspect to the third aspect.

In an eleventh aspect, a computer program product comprising instructions is provided, wherein when the instructions are executed by a computer, a communication device enables the communication method provided in the first to third aspects.

In a twelfth aspect, a computer program product comprising instructions is provided, and when the instructions are executed by a computer, a communication device enables the communication method provided in the first to third aspects.

In a thirteenth aspect, a communication system is provided, comprising the aforementioned network device and terminal device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 shows an architecture diagram of a 5G V2X communication system applicable to an embodiment of the present application.

FIG. 2 shows an architecture diagram of a wireless access side applicable to an embodiment of the present application.

FIG. 3 shows a schematic flowchart of unicast communication applicable to an embodiment of the present application.

FIG. 4 shows a schematic flowchart of cell switching performed by a terminal device applicable to this embodiment.

FIG. 5 shows a schematic flowchart of a wireless communication method 500 provided in an embodiment of the present application.

FIG. 6 shows a schematic flowchart of a wireless communication method 600 provided in an embodiment of the present application.

FIG. 7 shows a schematic block diagram of a communication device according to an embodiment of the present application.

FIG8 shows a schematic architecture diagram of a communication device according to an embodiment of the present application.

FIG. 9 shows a schematic architecture diagram of a communication device according to an embodiment of the present application.

FIG. 10 shows a schematic architecture diagram of a communication device according to an embodiment of the present application.

Detailed ways

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

The Fifth-Generation (5G) mobile communication technology New Radio (NR) is a global 5G standard based on a new air interface design of Orthogonal Frequency Division Multiplexing (OFDM). It is also a very important foundation for the next generation of cellular mobile technology. The services of 5G technology are very diverse, and can be oriented to enhanced mobile broadband (eMBB) services, ultra-reliable low-latency communication (URLLC) services, and massive machine-type communication (mMTC) services. Among them, mMTC services can be, for example, industrial wireless sensor networks (IWSN) services, video surveillance (VideoSurveillance) services, and wearables services.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to everything (V2X) communication, for example, vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian (V2P) communication, and vehicle to network (V2N) communication.

The execution subject of the wireless communication method of the present application can be a terminal device or a network device.

Among them, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may be a station (ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a vehicle networking terminal, a computer, a laptop computer, a handheld communication device, a handheld computing device, a satellite wireless device, a wireless modem card, a TV set top box (STB), a customer premise equipment (CPE) and/or other devices for communicating on a wireless system and a next generation communication system, for example, a terminal device in a 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include devices that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and can be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

In addition, in the embodiments of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

Among them, the network equipment may include access network equipment or core network equipment.

Among them, the access network device can be an access network device or other device used to communicate with a mobile device. The access network device can be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, or a gNB in a new wireless system (New Radio, NR) system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a roadside unit (Roadside Unit, RSU), or an in-vehicle device, a wearable device, and an access network device in a future 5G network or an access network device in a future evolved PLMN network, etc.

In addition, in an embodiment of the present application, the access network device provides services for a cell, and the terminal device communicates with the access network device through the transmission resources used by the cell (for example, time-frequency resources, frequency resources, or spectrum resources). The cell may be a cell corresponding to the access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

The core network device can be connected to multiple access network devices to control the access network devices, and can distribute data received from the network side (for example, the Internet) to the access network devices.

Among them, the functions and specific implementation methods of the terminal devices, access network devices and core network devices listed above are only exemplary illustrations, and this application is not limited to them.

The terminal device or network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU) and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute the program.

In addition, various aspects or features of the embodiments of the present application can be implemented as methods, devices or products using standard programming and/or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact disks (Compact Disc, CD), digital versatile disks (Digital Versatile Disc, DVD), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

It should be noted that multiple applications can be run at the application layer. In this case, the application that executes the communication method of the embodiment of the present application and the application used to control the receiving device to complete the action corresponding to the received data may be different applications.

In order to enrich the functions of mobile cellular networks, 3GPP (Third Generation Partnership Project) has added support for V2X communication, which mainly provides services for the transmission of safety application messages in the Internet of Vehicles. With the development of the next generation 5G mobile network, future 5G V2X communication can support more Internet of Vehicles application scenarios, including vehicle teaming, sensor expansion, remote driving and enhanced autonomous driving, etc.

FIG1 is a diagram of the architecture of a 5G V2X communication system applicable to an embodiment of the present application. As shown in FIG1 , within the 5G core network circle are 5G core network elements, and different network elements are connected using service-oriented interfaces. UEs communicate directly using the PC5 interface, and UEs communicate with base stations using the Uu interface. FIG2 is a diagram of the architecture of the wireless access side. As shown in FIG2 , the interface between the access network element or device and the access and mobility management function (AMF), and the AMF and the access network element or device communicate through the N2 interface, and the access network elements or devices communicate through the Xn interface. The UE switches to the access network element or device under the control of the same AMF for Xn switching (there is the possibility of not replacing the AMF), and the UE switches to the access network element or device under the control of different AMFs for N2 switching (there is the possibility of replacing the AMF).

Among them, the access and mobility management function is one of the core network functions of the 5G core network. It is logically interconnected with the gNodeB through the NG interface and is mainly used to implement the access management function.

Before conducting V2X sidelink communication, the terminal device can configure sidelink radio bearers (SLRB) corresponding to the service characteristic parameters. Among them, the service characteristic parameters may include quality of service (QoS). In the LTE system, the QoS of UE data packets is guaranteed by PPPP (ProSe Per Packet Priority, short-range communication data packet priority) and PPPR (ProSe Per Packet Reliability, short-range communication data packet reliability). For each data packet, PPPP and PPPR are determined by the application layer. Both PPPP and PPPR can be integers from 1 to 8. The higher the number, the lower the priority and reliability requirements. When the application layer submits the data packet to the underlying transmission, the PPPP and PPPR of the data packet are set. And the mapping of data packets to SLRB is completed by the terminal, and the specific mapping rules are determined by the terminal itself.

QoS refers to a network's ability to use various basic technologies to provide better service capabilities for specified network communications. It is a network security mechanism and a technology used to solve problems such as network delays and congestion. The guarantee of QoS is very important for networks with limited capacity.

The data flow-based QoS model is used to measure link unicast, multicast and broadcast. For UEs in the radio resource control (RRC) connected state, for a new PC5 QoS data flow, the UE can report the QoS information of the data flow through RRC dedicated signaling. The network device can provide SLRB configuration and configure the correspondence between the data flow and SLRB through RRC dedicated signaling based on the QoS information reported by the UE. For UEs in the RRC idle state, the network device can provide SLRB configuration and configure the mapping of PC5 QoS and SLRB through the V2X dedicated system information block (SIB). For UEs out of coverage, SLRB configuration and the mapping of PC5 QoS and SLRB are pre-configured.

In the 5G system, the QoS of terminal data packets is based on a QoS flow mechanism with a guaranteed bit rate (GBR) or a non-guaranteed bit rate (non-GBR), and the SDAP (Service Data Adaptation Protocol) layer is introduced to complete the mapping of QoS flows to RBs. PC5 QoS flows are identified by QoS flow identification (PFI), and PC5 QoS flows can be mapped to SLRBs in the access stratum (AS). One or more PC5 QoS flows can be mapped to the same SLRB, but a PC5 QoS flow can only be mapped to one SLRB. The QoS characteristics of data packets on the same PC5 QoS flow are the same, and the mapping of PC5 QoS and PC5 QoS flows is completed by the terminal device.

In 3GPP R14 and later R15 standards, V2X communication based on the PC5 communication interface only uses broadcast communication to send V2X messages. The specific communication process is as follows:

The application layer of the V2X UE sends the broadcast message data packet along with its QoS requirements, the priority (ProSe Per-Packet Priority, PPPP) and reliability (ProSe Per-Packet Reliability, PPPR) of the data packet through the V2X layer to the access layer (Access Stratum, AS). The V2X UE sends the PPPP and PPPR information to the base station along with the PC5 communication resource application, and the base station allocates a resource pool for the V2X UE based on the PPPP and PPPR information. The concept of resource pool here is: a collection of time domain or frequency wireless resources that the UE can use.

At present, 3GPP has formulated communication processes for three PC5 communication modes: unicast, groupcast (or multicast) and broadcast. Taking unicast communication as an example, Figure 3 is a schematic flow chart of unicast communication applicable to the embodiment of the present application. As shown in Figure 3, the specific steps are as follows:

S301, the terminal device requests service authorization and provisioning from the base station and the 5G core network.

Among them, the terminal device can use PC5 QoS rules and PC5 QoS profiles for service authorization and provision, and provide the PC5 QoS profile for each PC5 QoS flow for the terminal device.

S302: The terminal device sends the data to be sent and its corresponding QoS requirements from the application layer to the V2X layer.

Among them, the application layer of the terminal device can send the data packets to be sent and their corresponding QoS requirements to the V2X layer.

S303: The terminal device maps the QoS requirements of the application layer to specific QoS parameters.

Among them, the selection of QoS parameters depends on the requirements of the V2X application of the application layer for V2X communication, including: latency, packet loss rate, bandwidth and distance (Range). Among them, unlike traditional cellular communication (communication between mobile phones and base stations), QoS parameters, in addition to the standardized PQI (PC5 5G QoS Identifier) and other parameters such as rate, also add distance parameters. This distance refers to the minimum communication distance that can ensure that the receiving node meets other QoS requirements (that is, other QoS parameter indicators except Range parameters). The V2X layer allocates these data packets to the corresponding PC5 QoS flows according to the pre-configured QoS rules. Each PC5 QoS flow is identified by PFI (PC5 QoS Flow Identifier).

S304, the terminal device sends the data packet and its corresponding PFI and QoS parameters corresponding to the PFI to the AS layer.

Among them, the V2X layer can send the data packet and its corresponding PFI and the QoS parameters corresponding to the PFI to the AS layer.

S305, the terminal device applies for PC5 communication resources from the base station.

Among them, when the AS layer receives the data packet to be sent by the upper layer and its corresponding QoS parameters, the terminal device can apply for wireless resources from the base station, and at the same time, it can carry QoS configuration information (including: PFI, PQI corresponding to the QoS flow and other QoS parameters). The base station configures SLRB (Sidelink Radio Bearer) for the terminal device according to the QoS parameters and sends the configuration information to the terminal device.

FIG4 is a schematic flow chart of a cell switching performed by a terminal device applicable to the present embodiment. As shown in FIG4 , the specific steps are as follows:

S401, the terminal device sends a measurement report to the source base station.

Among them, the terminal device periodically sends measurement reports (including information such as the quality and strength of the wireless resource channels used by the terminal device) to the source base station during the communication process. The source base station can determine whether to initiate the switching process of the terminal device based on the measurement reports sent by the terminal device.

S402: The source base station sends a handover request to the target base station.

Among them, the selection of the target base station can be based on the location of the terminal device, or selecting the base station with the strongest detected signal strength in the measurement report reported by the terminal device, or selecting a base station with a lower load for load balancing between base stations, etc. The specific target base station selection is not limited here.

S403: The target base station sends a switching feedback to the source base station.

After receiving the feedback request, the target base station may feed back a switching request to the source base station.

S404, the terminal device sends an RRC reconnection indication to the target base station.

The source base station may also send relevant information of the additional resource pool to the terminal device.

S405, the terminal device performs a switching operation with the target base station.

Among them, after receiving the RRC reconnection indication, the terminal device can perform a switching operation from the source base station to the target base station.

S406, the terminal device sends RRC connection completion indication information to the target base station.

The RRC connection completion indication information is used to indicate that the terminal device and the target base station have completed the RRC connection. S407, the target base station sends a new resource pool to the terminal device.

Among them, when the terminal device completes the switching operation from the source base station to the target base station, the target base station can allocate a communication resource pool of the PC5 interface for use within the coverage area of the target base station to the terminal device, and send the new resource pool to the terminal device.

In the above switching process, there are two main resource pool allocation steps:

1. Optionally, the source base station sends an additional resource pool to the terminal device along with the handover instruction for use during the handover process;

2. After the handover is completed, the target base station sends the communication resource pool of the PC5 interface for the cell to the terminal device.

In addition, when the source base station sends a handover request to the target base station, the following information may be carried: X2 signaling message of the terminal device at the source base station (X2 is the interface between 4G base stations, corresponding to the Xn interface of 5G), S1 signaling message (S1 is the interface between the 4G base station and the mobile management entity or service gateway, corresponding to the NG interface of 5G), target base station identification, security key information, RRC message, E-RAB information (E-UTRAN Radio Access Bearer, wireless access bearer, including network layer and transport layer address information and QoS configuration information) and other information. It can be found that this information only contains the relevant information of the communication between the UE and the base station, that is, the information of the Uu (interface between the terminal device and UTRAN) interface (such as E-RAB is the wireless bearer information of the Uu port), and there is no relevant bearer information of PC5.

In summary, when the target base station sends a new resource configuration to the terminal device, it cannot obtain the PC5 QoS requirement information (i.e., PC5 QoS Profile, PC5 QoS configuration) of the service used by the terminal device. Therefore, when the target base station allocates PC5 communication resources to the terminal device, the allocated resources may not meet the communication needs of the terminal device.

On the other hand, due to the characteristics of vehicle mobility, cell switching may occur frequently during vehicle driving.

In view of the fact that, unlike the communication method of the Uu interface, the V2X communication based on PC5 uses side link resources, that is, through reasonable resource allocation, multiple base stations coordinate resources, and multiple cells can use the side link resources of the same frequency band. This can avoid the problem of frequent resource switching due to vehicle mobility, and also reduce the communication signaling overhead of the side link (because when the sending node switches the side link resource, it can send a side link signaling message to notify the opposite receiving node). Therefore, in the switching process of PC5, this application designs a method to achieve the effect of optimizing the side link resources.

It should be understood that in the embodiments of the present application, in order to distinguish without loss of generality, the first base station represents the source base station, the second base station represents the target base station, and the second terminal device represents the peer terminal device.

Fig. 5 is a schematic flow chart of a wireless communication method 500 provided in an embodiment of the present application. The method 500 may include the following steps.

S501: A first base station sends first information to a second base station.

The first information may be used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station.

Specifically, before the process of switching from the first base station to the second base station can be understood as the first terminal has not started the switching between base stations, for example, in conjunction with FIG. 4 , before step 405 .

Optionally, the first information includes PC5 QoS information and at least one of the second PC5 resource information.

Among them, the PC5 QoS information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station. In addition to the standardized PQI and other parameters such as rate, the PC5 QoS information also adds a distance parameter, which refers to the minimum communication distance that can ensure that the receiving node meets other QoS requirements (i.e., other QoS parameter indicators except the Range parameter). The second PC5 resource information is used to characterize the second PC5 resource. For example, the second PC5 resource can be SLRB configuration information and the corresponding SLRB identifier, wherein the SLRB configuration can include RLC (Radio link control) layer configuration (retransmission mechanism, etc.), Media access control (Media access control, MAC) layer configuration (communication frequency band mapping, wireless resource scheduling information, etc.), physical layer configuration (information such as the wireless channel frequency band used), and the SLRB configuration information can include logical channel identification information, MAC layer scheduling data to the physical layer frequency band identification information, etc., and this application does not limit this.

The second PC5 resource may include at least one PC5 resource for the first terminal to perform PC5 interface communication before switching from the source base station to the target base station. The second PC5 resource may be allocated by the first base station to the first terminal. The second PC5 resource may be a resource pool, which may include one or more PC5 resources.

The PC5 resource can be used to carry data of the PC5 interface. Specifically, the PC5 resource can be a communication frequency band of the physical layer, which is not restricted. The communication frequency band can be a combination of multiple communication frequency bands (ie, a resource pool), or a specified communication frequency band, which is not restricted.

It should be noted that the first base station can configure the second PC5 resource (i.e., resource pool) for the first terminal by static configuration or dynamic configuration. Further, when the first terminal transmits data of a certain service, the first terminal can select a communication frequency band from the second PC5 resource to carry the data of the service according to the QoS requirements (parameters) corresponding to the service.

In a possible implementation manner of step S501, the first base station may send a first request message to the second base station, where the first request message is used to request to switch the first terminal from the first base station to the second base station.

The first request message may include first information.

Optionally, the first base station can send the second PC5 resource to the first terminal. The second PC5 resource obtained by the first terminal from the first base station includes 8 different communication frequency bands. It can judge whether the frequency band is occupied by listening to the occupancy rate of the 8 frequency bands in the wireless information (the time ratio of the receiving power of a certain frequency band greater than a certain threshold per unit time), or judge whether the frequency band can meet the QoS requirement by detecting the channel quality of the frequency band (for example, there may be a corresponding receiving power threshold for the QoS requirement of a certain communication distance, and different communication distances may correspond to different receiving power thresholds). In addition, one of the 8 communication frequency bands can be selected for communication according to a certain criterion (not limited in this application).

It should be understood that when the second PC5 resource includes only one PC5 resource for the first terminal to perform PC5 interface communication before switching from the source base station to the target base station, then the resource is the PC5 resource for the first terminal to perform PC5 interface communication before switching from the source base station to the target base station; or, when the second PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication before switching from the source base station to the target base station, then one PC5 resource is selected from the second PC5 resource as the PC5 resource for the first terminal to perform PC5 interface communication before switching from the source base station to the target base station, for example, the PC5 resource with the best quality or the highest priority in the second PC5 resource is selected, and this application is not limited here.

For example, the PC5 resource information of the first terminal may be included in a transparent RRC container of the Uu interface switching, which may also include: the ID of the second base station, the communication interface capability information of the first terminal, the QoS flow and QoS parameter configuration information of the Uu interface, etc.

Optionally, the first base station acquires the first information by receiving the first information sent by the first terminal. Specifically, the first base station may send indication information to the first terminal to instruct the first terminal to report the first information.

In another possible implementation, when the first terminal performs a handover between base stations through the core network, the first base station may send a second request message to the access and mobility management node. The second request message may include the first information, and the second request message may be used to request that the first terminal be handed over from the first base station to the second base station.

S502: The second base station sends first PC5 resource information to the first base station according to the first information.

After receiving the first information, the second base station may determine the first PC5 resource information according to the first information, and then send the first PC5 resource information to the first base station.

Specifically, the second base station may determine the first PC5 resource information according to the PC5 QoS information or the second PC5 resource information included in the first information. For example, when the first information includes the PC5 QoS information and the second PC5 resource information, first, the second base station determines the third PC5 resource information according to the PC5 QoS information, the third PC5 resource information is used to characterize the third PC5 resource, and the third PC5 resource includes at least one PC5 resource that satisfies the PC5 QoS information. Secondly, the second base station may allocate the first PC5 resource to the first terminal through the second PC5 resource and the third PC5 resource, and the first PC5 resource may be the intersection of the second PC5 resource information and the third PC5 resource information, or the third PC5 resource information and part of the second PC5 resource information, which is not limited in this application; or, when the first information only includes the second PC5 resource information, the second base station may allocate the first PC5 resource to the first terminal according to the second PC5 resource information, and the first PC5 resource is included in the second PC5 resource; or, when the first information only includes the PC5 QoS information, the second base station may allocate the first PC5 resource to the first terminal according to the PC5 QoS information.

The first PC5 resource information is used to characterize the first PC5 resource, and the first PC5 resource is used for the first terminal to perform PC5 interface communication during the process of switching from the first base station to the second base station. The process of switching from the first base station to the second base station by the first terminal can be started from the reconfiguration of the RRC connection by the first terminal and ended with the completion of the RRC connection with the second base station. For example, in conjunction with FIG. 4 , during steps 405 to 406.

It should be understood that the first PC5 resource information may be SLRB configuration information and the corresponding SLRB identifier. Specifically, the SLRB configuration may include radio link control layer configuration (e.g., retransmission mechanism, logical channel configuration, etc.), MAC layer configuration (e.g., communication frequency band mapping, wireless resource scheduling information, etc.), physical layer configuration (information such as the wireless channel frequency band used), and the SLRB configuration information may include logical channel identification information, frequency band identification information of MAC layer scheduling data to the physical layer, etc., and this application does not limit this.

It should be noted that when there is a PC5 QoS requirement, the resources included in the third PC5 resource meet the QoS requirement. For example, when the QoS requirement includes a guaranteed flow bit rate (GFBR), the third PC5 resource can at least guarantee the transmission rate corresponding to the GFBR value; when the QoS requirement includes a transmission distance, the third PC5 resource can guarantee that other QoS parameters within the transmission distance value are met. For example, when the QoS parameter is PQI=1 and the transmission distance (Range)=500 meters, the QoS requirement is that the data transmission of 500 meters can guarantee a packet delay budget of 20 milliseconds and a packet error rate of ^10-4 .

In one possible implementation, the second base station may send a first request response message to the first base station, where the first request response message includes the first PC5 resource information.

It should be noted that when the first terminal switches between base stations through the core network, the second base station receives a second request message from the access and mobility management node, and the second request message includes the first information. Based on the first information, a second request response message is sent to the access and mobility management node, and the second request response message includes the first PC5 resource information.

Through the above scheme, the second base station can obtain the PC5 resources of the first terminal before switching base stations, and the second base station determines the first PC5 resources, that is, the PC5 resources used by the first terminal for communication during the switching base station process, so that the second base station can allocate PC5 resources to the first terminal in advance for communication.

S503: The first base station sends first PC5 resource information to the first terminal.

After receiving the first PC5 resource information sent by the second base station, the first base station may send the first PC5 resource information to the first terminal.

Furthermore, after receiving the first PC5 resource information, the first terminal can select a PC5 resource from the first PC5 resources represented by the first PC5 resource information as the target PC5 resource, and then perform PC5 interface communication through the target PC5 resource during the process of the first terminal switching from the first base station to the second base station. In addition, the first terminal can also send the first PC5 resource information to the second terminal, so that the first terminal and the second terminal communicate through the first PC5 resource during the process of the first terminal switching from the first base station to the second base station.

It should be noted that the first PC5 resource may include at least one PC5 resource used for the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station.

Exemplarily, when the first PC5 resource includes only one PC5 resource for the first terminal to perform PC5 interface communication during the process of switching from the first base station to the second base station, the first terminal uses the resource for communication; or, when the first PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication during the process of switching from the first base station to the second base station, the first terminal can select one PC5 resource from the first PC5 resource for the first terminal to perform PC5 interface communication during the process of switching from the first base station to the second base station. Specifically, the PC5 resource can be selected based on the quality or priority of each PC5 resource in the first PC5 resource, which is not limited in this application.

It should be understood that when the first terminal is about to transmit data of a certain service, the first terminal can select a PC5 resource from the first PC5 resource to carry the data of the service according to the QoS requirements (parameters) corresponding to the data. For example, assuming that the first PC5 resource includes 8 different communication frequency bands, the first terminal can judge whether the frequency band is occupied by listening to the occupancy rate of the 8 frequency bands in the wireless information, or judge whether the frequency band can meet the QoS requirements by detecting the channel quality of the frequency band. In addition, one of the 8 communication frequency bands can be selected for communication according to a certain criterion (not limited in this application).

It should also be understood that when the first terminal performs a handover between base stations through the core network, the first base station receives a second request response message from the access and mobility management node, and the second request response message includes the first PC5 resource information.

Optionally, the second base station may receive PC5 QoS information from the first terminal, the PC5 QoS information is used for the first terminal to perform PC5 interface communication before the process of switching from the first base station to the second base station, and the second base station sends fourth PC5 resource information to the first terminal according to the PC5 QoS information, the fourth PC5 resource information is used to characterize the fourth PC5 resource, and the fourth PC5 resource information is used for the first terminal to perform PC5 communication after the process of switching from the first base station to the second base station. For example, in conjunction with FIG. 4 , after step 406.

The fourth PC5 resource may include at least one PC5 resource for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station. Optionally, the fourth PC5 resource includes the first PC5 resource. After receiving the fourth PC5 resource information, the first terminal may select a PC5 resource information for communication based on factors such as the quality and priority of the PC5 resource in the fourth PC5 resource. The specific selection method is not limited in this application.

Through the above solution, the second base station obtains the PC5 QoS information of the first terminal, and the second base station determines whether the first terminal can continue to use the SLRB configuration of the first base station in the cell covered by it, and sends the SLRB configuration that can continue to be used and the first PC5 resource allocated by the second base station to the first terminal, that is, the fourth PC5 resource information, to the first terminal. As a result, after completing the handover, the first terminal can continue to use part or all of the original SLRB configuration, thereby reducing the excessive resource overhead of signaling interaction or notification with the second terminal caused by changing the PC5 communication resources.

Fig. 6 is a schematic flow chart of a wireless communication method 600 provided in an embodiment of the present application. The method 600 may include the following steps.

S601: A first base station sends indication information to a first terminal.

The indication information is used to instruct the first terminal to report the first information. For the description of the first information, reference may be made to the relevant description of the first information in S501, and for the sake of brevity, this application will not elaborate on it here.

S602: The first terminal sends first information to the first base station.

S603: The first terminal sends measurement information to the first base station.

Optionally, the first terminal may report the measurement information to the first base station. Specifically, the first terminal may periodically send the measurement information to the first base station during the communication process.

The measurement information may include information such as the quality and strength of the wireless resource channel used by the first terminal.

Among them, the first base station can select the second base station for the first terminal according to the measurement information reported by the first terminal. This application does not limit the selection conditions of the specific second base station, and then the first terminal performs a switching process from the first base station to the second base station.

It should be understood that when the first terminal does not switch between base stations through the core network, steps S604 to S606 are executed and steps S607 to S611 are not executed; or, when the first terminal switches between base stations through the core network, steps S607 to S611 are executed and S604 to S606 are not executed.

S604: The first base station sends first information to the second base station.

After receiving the first information, the first base station may send the first information to the second base station. Optionally, the first base station may determine, based on the measurement information sent by the first terminal, that the first terminal has a need to perform cell switching, and send the first information to the second base station.

In one possible implementation, the first base station may send a first request message to the second base station, where the first request message is used to request to switch the first terminal from the first base station to the second base station, and the first request message includes the above-mentioned first information.

S605: The second base station allocates the first PC5 resource.

The second base station may allocate the first PC5 resource to the first terminal according to the first information. For the description of the first PC5 resource and the first PC5 resource information, reference may be made to the relevant description in S502 above. For the sake of brevity, this application will not elaborate on it here.

S606: The second base station sends the first PC5 resource information to the first base station.

S607: The first base station sends first information to the access and mobility management node.

After receiving the first information, the first base station may send the first information to the access and mobility management node. Optionally, the first base station determines that the first terminal can perform cell switching based on the measurement information sent by the first terminal, and sends the first information to the access and mobility management node.

In one possible implementation, the first base station may send a second request message to the access and mobility management node, where the second request message is used to request handover of the first terminal from the first base station to the second base station, and the second request message includes the above-mentioned first information.

S608: The access and mobility management node sends first information to the second base station.

S609: The second base station allocates the first PC5 resource.

The second base station may allocate the first PC5 resource to the first terminal according to the first information. For the description of the first PC5 resource and the first PC5 resource information, reference may be made to the relevant description in S502 above. For the sake of brevity, this application will not elaborate on it here.

S610: The second base station sends first PC5 resource information to the access and mobility management node according to the first information.

The second base station may send a second request response message to the access and mobility management node, where the second request response message includes the first PC5 resource information.

S611: The access and mobility management node sends first PC5 resource information to the first base station.

S612: The first base station sends first PC5 resource information to the first terminal.

S613, the first terminal device determines the resource information of the first target PC5.

The first target PC5 resource information is used to represent the first target PC5 resource. After receiving the first PC5 resource information, the first terminal can select a PC5 resource from the first PC5 resource information as the first target PC5 resource for the first terminal device to perform PC5 interface communication during the process of switching from the first base station to the second base station. For the specific method of selecting the first target PC5 resource, reference can be made to the relevant description of selecting a PC5 resource from the first PC5 resource in S503 above. For the sake of brevity, this application will not elaborate on it here.

S614: The first terminal sends PC5 QoS information to the second base station.

Among them, the PC5 QoS information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station. In addition to the standardized PQI and other parameters such as rate, the PC5 QoS information also adds a distance parameter, which refers to the minimum communication distance that can ensure that the receiving node meets other QoS requirements (that is, other QoS parameter indicators except the Range parameter). Optionally, the first terminal and the second base station can perform RRC connection and complete time synchronization and other operations. In addition, after completing the RRC connection, the first terminal can send an RRC connection completion indication message to the second base station.

In a possible implementation manner, the first terminal may send an RRC connection reconfiguration message to the second base station, where the RRC connection reconfiguration message includes PC5 QoS information.

S615: The first terminal sends resource information of the first target PC5 to the second terminal.

Among them, by sending the first target PC5 resource information to the second terminal through the first terminal, the first terminal and the second terminal can communicate through the first target PC5 resource during the process of the first terminal switching from the first base station to the second base station.

Based on the above scheme, during the process of cell switching of the first terminal, the first base station sends the PC5 interface information of the first terminal (including QoS information, SLRB configuration, communication method, etc.) to the second base station, so that the second base station can configure the PC5 communication resources for the destination cell for the first terminal in advance during the switching of the first terminal, so that the PC5 resources allocated by the second base station to the first terminal after the switching can meet the PC5 communication requirements between terminal devices.

S616: The second base station sends fourth PC5 resource information to the first terminal according to the PC5 QoS information.

The fourth PC5 resource information is used to characterize the fourth PC5 resource, and the fourth PC5 resource information is used for the first terminal to perform PC5 interface communication after the process of switching from the first base station to the second base station, and the fourth PC5 resource may include at least one PC5 resource for the first terminal to perform PC5 interface communication after the process of switching from the first base station to the second base station. Optionally, the fourth PC5 resource includes the first PC5 resource. The process of the first terminal switching from the first base station to the second base station is after the first terminal has established an RRC connection with the second base station. For example, in conjunction with FIG. 4, after step 406.

S617, the first terminal device determines the resource information of the second target PC5.

Among them, the second target PC5 resource information is used to characterize the second target resource. The first terminal can select a PC5 resource from the fourth PC5 resource as the second target PC5 resource. The second target PC5 resource is used for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station.

Exemplarily, when the fourth PC5 resource includes only one PC5 resource for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station, the PC5 resource is selected as the second target PC5 resource for communication; or, when the fourth PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station, the first terminal can select one PC5 resource from the fourth PC5 resource as the second target PC5 resource for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station. Specifically, the second target PC5 resource can be selected based on the quality or priority of each PC5 resource in the fourth PC5 resource, and this application is not limited here.

It should be understood that when the first terminal is about to transmit data of a certain service, the first terminal can select a PC5 resource from the fourth PC5 resource to carry the data of the service according to the QoS requirements (parameters) corresponding to the data. For example, assuming that the fourth PC5 resource includes 8 different communication frequency bands, the first terminal can judge whether the frequency band is occupied by listening to the occupancy rate of the 8 frequency bands in the wireless information, or judge whether the frequency band can meet the QoS requirements by detecting the channel quality of the frequency band. In addition, one of the 8 communication frequency bands can be selected for communication according to a certain criterion (not limited in this application).

S618: The first terminal sends resource information of the second target PC5 to the second terminal.

By sending the second target PC5 resource information to the second terminal through the first terminal, the first terminal and the second terminal can communicate using the second target PC5 resource after the first terminal switches from the first base station to the second base station.

S619, storing the fourth PC5 resource information.

Optionally, the second base station may store the fourth PC5 resource information, so that the first terminal may directly use the PC5 resource information of the first terminal during the next inter-base station handover.

Based on the above scheme, the second base station obtains the PC5 interface information of the first terminal including the SLRB configuration of the first terminal, and the second base station determines whether the first terminal can continue to use the SLRB configuration of the first base station in the cell covered by it, and sends the SLRB configuration that can continue to be used to the first terminal together with the PC5 interface communication resources allocated by the second base station to the first terminal. As a result, after the first terminal completes the handover, it can continue to use the original SLRB configuration, thereby reducing the resource overhead of signaling interaction or notification with the second terminal due to the change of PC5 communication resources.

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

It can be understood that in the above-mentioned method embodiments, the methods and operations implemented by the terminal device can also be implemented by components that can be used for the terminal device (such as chips or circuits), and the methods and operations implemented by the network device can also be implemented by components that can be used for the network device (such as chips or circuits).

The method provided in the embodiment of the present application is described in detail above in conjunction with Figures 5 and 6. The communication device provided in the embodiment of the present application is described in detail below in conjunction with Figures 7 to 10. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, the content not described in detail can be referred to the method embodiment above, and for the sake of brevity, it will not be repeated here.

The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the interaction between various network elements. It can be understood that each network element, such as a transmitting end device or a receiving end device, includes a hardware structure and/or software module corresponding to the execution of each function in order to realize the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

The embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

FIG7 is a schematic block diagram of a communication device provided in an embodiment of the present application. The communication device 700 includes a receiving unit 710, a sending unit 720, and a processing unit 730. The receiving unit 710 can implement a communication function of receiving, the sending unit 720 can implement a communication function of sending, and the processing unit can implement a communication function of life and death processing. The receiving unit 710 and the sending unit 720 can also be referred to as a communication interface or a communication unit.

Optionally, the communication device 700 may further include a storage unit, which may be used to store instructions and/or data, and the processing unit 730 may read the instructions and/or data in the storage unit so that the communication device implements the aforementioned method embodiment.

It should be understood that the processing unit 730 of the communication device 700 can be implemented by at least one processor or processor-related circuits. The receiving unit 710 and the sending unit 720 can be implemented by a transceiver or a transceiver-related circuit. The receiving unit 710 and the sending unit 720 can also be referred to as a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

The communication device 700 can be used to execute the actions performed by the terminal device in the above method embodiment. In this case, the communication device 700 can be a terminal device or a component that can be configured in the terminal device. The receiving unit 710 is used to execute the reception-related operations on the terminal device side in the above method embodiment. The sending unit 720 is used to execute the sending-related operations on the terminal device side in the above method embodiment. The processing unit 730 is used to execute the processing-related operations on the terminal device side in the above method embodiment.

Alternatively, the communication device 700 can be used to execute the actions performed by the network device in the above method embodiment. In this case, the communication device 700 can be a network device or a component that can be configured on the network device, the receiving unit 710 is used to execute the receiving-related operations on the network device side in the above method embodiment, and the sending unit 720 is used to execute the sending-related operations on the network device side in the above method embodiment.

As a design, the communication device 700 is used to execute the action performed by the first terminal in the embodiment shown in FIG. 5 above, and the receiving unit 710 is used for: S503.

As an example, the communication device 700 is used to execute the actions performed by the first terminal in the embodiment shown in Figure 6 above, and the receiving unit 710 is used for: S601, S610, S613; the sending unit 720 is used for: S602, S603, S611, S612, S614; the processing unit 730 is used for: S613, S617.

As another example, the communication device 700 is used to execute the action executed by the second terminal in the embodiment shown in FIG. 6 above, and the receiving unit 710 is used to: S612, S614.

The communication device 700 can implement the steps or processes executed by the first terminal or the second terminal in the method 500 and the method 600 according to the embodiment of the present application, and the communication device 700 may include a unit for executing the method executed by the first terminal or the second terminal in the method 500 in FIG. 5 and the method 600 in FIG. 6. In addition, each unit in the communication device 700 and the above-mentioned other operations and/or functions are respectively for implementing the corresponding processes of the method 500 in FIG. 5 and the method 600 in FIG. 6.

When the communication device 700 is used to execute the method 500 in FIG. 5 , the receiving unit 710 may be used to execute step 503 in the method 500 .

When the communication device 700 is used as a first terminal to execute the method 600 in Figure 6, the receiving unit 710 can be used to execute steps 601, 610, and 613 in the method 600, the sending unit 720 can be used to execute steps 602, 603, 611, 612, and 614 in the method 600, and the processing unit 730 can be used to execute steps 612 and 614 in the method 600.

When the communication device 700 is used as a second terminal to execute the method 600 in FIG. 6 , the receiving unit 710 may be used to execute steps 612 and 614 in the method 600 .

It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

As another design, the communication device 700 is used to execute the actions performed by the first base station in the embodiment shown in FIG. 5 above, and the receiving unit 710 is used for: S502; the sending unit 720 is used for: S501, S503.

As an example, the communication device 700 is used to execute the action executed by the second base station in the embodiment shown in FIG. 5 above, and the receiving unit 710 is used to: S501; the sending unit 720 is used to: S502.

As another example, the communication device 700 is used to perform the actions performed by the first base station in the embodiment shown in Figure 6 above, and the receiving unit 710 is used for: S602, S603, S605, S609; the sending unit 720 is used for: S601, S604, S606, S610.

As another example, the communication device 700 is used to execute the actions performed by the second base station in the embodiment shown in Figure 6 above, and the receiving unit 710 is used for: S604, S607, S611; the sending unit 720 is used for: S605, S608, S613; the processing unit 730 is used for: S605, S609.

The communication device 700 can implement the steps or processes performed by the first base station or the second base station in the method 500 and the method 600 according to the embodiment of the present application, and the communication device 700 may include a unit for executing the method performed by the first base station or the second base station in the method 500 in Figure 5 and the method 600 in Figure 6. In addition, each unit in the communication device 700 and the above-mentioned other operations and/or functions are respectively for implementing the corresponding processes of the method 500 in Figure 5 and the method 600 in Figure 6.

As shown in Fig. 8, the embodiment of the present application further provides a communication device 800. The communication device 800 includes a processor 810, the processor 810 is coupled to a memory 820, the memory 820 is used to store computer programs or instructions and/or data, and the processor 810 is used to execute the computer programs or instructions and/or data stored in the memory 820, so that the method in the above method embodiment is executed.

Optionally, the communication device 800 includes one or more processors 810.

Optionally, as shown in FIG. 8 , the communication device 800 may further include a memory 820 .

Optionally, the communication device 800 may include one or more memories 820 .

Optionally, the memory 820 may be integrated with the processor 810 or provided separately.

Optionally, as shown in Fig. 8, the communication device 800 may further include a transceiver 830, and the transceiver 830 is used for receiving and/or sending signals. For example, the processor 810 is used to control the transceiver 830 to receive and/or send signals.

As a solution, the communication device 800 is used to implement the operations performed by the first terminal or the second terminal in the above method embodiment.

For example, the processor 810 is used to implement the processing-related operations performed by the first terminal or the second terminal in the above method embodiment, and the transceiver 830 is used to implement the sending and receiving-related operations performed by the first terminal or the second terminal in the above method embodiment.

As another solution, the communication device 800 is used to implement the operations performed by the first base station or the second base station in the above method embodiment.

For example, the processor 810 is used to implement the processing-related operations performed by the first base station or the second base station in the above method embodiment, and the transceiver 830 is used to implement the transceiver-related operations performed by the first base station or the second base station in the above method embodiment.

The embodiment of the present application further provides a communication device 900, which can be a terminal device or a chip. The communication device 900 can be used to execute the operations executed by the first terminal and the second terminal in the above method embodiment.

When the communication device 900 is a terminal device, FIG9 shows a simplified schematic diagram of the structure of the terminal device. As shown in FIG9 , the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute software programs, process the data of the software programs, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input-output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input-output devices.

When data is sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in FIG9. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and the embodiments of the present application do not limit this.

In the embodiment of the present application, the antenna and the radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device.

As shown in Fig. 9, the terminal device includes a transceiver unit 910 and a processing unit 920. The transceiver unit 910 may also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit 920 may also be referred to as a processor, a processing board, a processing module, a processing device, etc.

Optionally, the device used to implement the receiving function in the transceiver unit 910 can be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 910 can be regarded as a sending unit, that is, the transceiver unit 910 includes a receiving unit and a sending unit. The transceiver unit may also be sometimes referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may also be sometimes referred to as a receiver, a receiver, or a receiving circuit. The sending unit may also be sometimes referred to as a transmitter, a transmitter, or a transmitting circuit.

It should be understood that FIG9 is merely an example and not a limitation, and the terminal device including the transceiver unit and the processing unit may not rely on the structure shown in FIG9 .

When the communication device 900 is a chip, the chip includes a transceiver unit and a processing unit, wherein the transceiver unit may be an input/output circuit or a communication interface; and the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

The embodiment of the present application further provides a communication device 1000, which can be a network device or a chip. The communication device 1000 can be used to execute the operations executed by the network device in the above method embodiment.

When the communication device 1000 is a network device, for example, a base station. FIG. 10 shows a simplified schematic diagram of the base station structure. The base station includes a portion 1010 and a portion 1020. The portion 1010 is mainly used for receiving and transmitting radio frequency signals and for converting radio frequency signals into baseband signals; the portion 1020 is mainly used for baseband processing, controlling the base station, etc. The portion 1010 can generally be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. The portion 1020 is generally the control center of the base station, which can generally be referred to as a processing unit, and is used to control the base station to perform the processing operations on the network device side in the above method embodiment.

The transceiver unit of part 1010 may also be referred to as a transceiver or a transceiver, etc., and includes an antenna and a radio frequency circuit, wherein the radio frequency circuit is mainly used for radio frequency processing. Optionally, the device used to implement the receiving function in part 1010 may be regarded as a receiving unit, and the device used to implement the sending function may be regarded as a sending unit, that is, part 1010 includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

Part 1020 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control of the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, or multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver unit of part 1010 is used to execute the transceiver-related steps performed by the first base station and the second base station in the embodiment shown in Figure 5; part 1020 is used to execute the processing-related steps performed by the first base station and the second base station in the embodiment shown in Figure 6.

For example, in another implementation, the transceiver unit of part 1010 is used to execute the transceiver-related steps performed by the first base station and the second base station in the embodiment shown in Figure 6; part 1020 is used to execute the processing-related steps performed by the first base station and the second base station in the embodiment shown in Figure 6.

It should be understood that FIG. 10 is only an example and not a limitation, and the network device including the transceiver unit and the processing unit may not rely on the structure shown in FIG. 10 .

When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit, wherein the transceiver unit may be an input/output circuit or a communication interface; and the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by a terminal device or a method executed by a network device in the above method embodiment are stored.

For example, when the computer program is executed by a computer, the computer can implement the method executed by the terminal device or the method executed by the network device in the above method embodiment.

An embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the method executed by a terminal device or a method executed by a network device in the above method embodiment.

An embodiment of the present application also provides a communication system, which includes the network device and the terminal device in the above embodiment.

Those skilled in the art can clearly understand that, for the sake of convenience and brevity of description, the explanation of the relevant contents and beneficial effects in any of the communication devices provided above can refer to the corresponding method embodiments provided above, and will not be repeated here.

In an embodiment of the present application, a terminal device or a network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

The embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided in the embodiments of the present application, as long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute a program.

Various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein may encompass a computer program accessible from any computer-readable device, carrier, or media.

The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. Available media (or computer-readable media) may include, but are not limited to: magnetic media or magnetic storage devices (e.g., floppy disks, hard disks (such as mobile hard disks), magnetic tapes), optical media (e.g., optical disks, compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.), or semiconductor media (e.g., solid state disks (SSDs), etc.), USB flash drives, read-only memories (ROMs), random access memories (RAMs), and other media that can store program codes.

The various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM may include the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement the solution provided by the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof.

When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer program instructions on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instruction can be stored in a computer-readable storage medium, or transmitted from a computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction can be transmitted from a website site, a computer, a server or a data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. About computer-readable storage medium, it can be described with reference to the above.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims and the specification.

Claims (15)

1. A wireless communication method, comprising: The second base station receives first information, where the first information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station; The second base station sends first PC5 resource information according to the first information, where the first PC5 resource information is used to represent a first PC5 resource, and the first PC5 resource is used for the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station; The second base station receives PC5 QoS information from the first terminal, where the PC5 QoS information is used for the first terminal to perform PC5 interface communication before a process of switching from the first base station to the second base station; The second base station sends fourth PC5 resource information to the first terminal according to the PC5 QoS information, where the fourth PC5 resource information is used to characterize a fourth PC5 resource and is used by the first terminal to perform PC5 interface communication after switching from the first base station to the second base station; The fourth PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station, and the fourth PC5 resource includes the first PC5 resource. 2. The method according to claim 1, wherein the first information comprises at least one of the following: PC5 QoS information, and second PC5 resource information; The second PC5 resource information is used to represent the second PC5 resource, and the second PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station. 3. The method according to claim 1 or 2, characterized in that the first PC5 resource includes at least one PC5 resource used by the first terminal to perform PC5 interface communication during a process of switching from the first base station to the second base station. 4. The method according to claim 2, wherein the second base station sends the first PC5 resource information according to the first information, comprising: Allocating, by the second base station, the first PC5 resource to the first terminal according to the first information; The second base station sends the first PC5 resource information. 5. The method according to claim 4, wherein the first information includes the PC5 QoS information and the second PC5 resource information, and the second base station allocates the first PC5 resource to the first terminal according to the first information, comprising: The second base station determines third PC5 resource information according to the PC5 QoS information, where the third PC5 resource information is used to characterize a third PC5 resource; The second base station allocates the first PC5 resource to the first terminal according to the second PC5 resource information and the third PC5 resource, where the first PC5 resource is included in the second PC5 resource and the third PC5 resource. 6. The method according to claim 4, wherein the first information includes the second PC5 resource information, and the second base station allocates the first PC5 resource to the first terminal according to the first information, comprising: The second base station allocates the first PC5 resource to the first terminal according to the second PC5 resource information, where the first PC5 resource is included in the second PC5 resource. 7. The method according to claim 1 or 2, wherein the second base station receives the first information, comprising: The second base station receives first request information from the first base station, where the first request information includes the first information, and the first request information is used to request to switch the first terminal from the first base station to the second base station; The second base station sends first PC5 resource information according to the first information, including: The second base station sends a first request response message to the first base station according to the first information, where the first request response message includes the first PC5 resource information. 8. The method according to claim 1 or 2, wherein the second base station receives the first information, comprising: The second base station receives a second request message from the access and mobility management node, where the second request message includes the first information, and the second request message is used to request to switch the first terminal from the first base station to the second base station; The second base station sends first PC5 resource information according to the first information, including: The second base station sends a second request response message to the access and mobility management node according to the first information, where the second request response message includes the first PC5 resource information. 9. A wireless communication method, comprising: The first terminal receives first PC5 resource information from the source base station, where the first PC5 resource information is used to represent a first PC5 resource, and the first PC5 resource is used by the first terminal to perform PC5 interface communication during a handover from the first base station to the second base station; The first terminal performs PC5 interface communication in a process of switching from the first base station to the second base station according to the first PC5 resource information; The first terminal sends PC5 QoS information to the second base station, where the PC5 QoS information is used for the first terminal to perform PC5 interface communication before switching from the first base station to the second base station; The first terminal receives fourth PC5 resource information from the second base station, where the fourth PC5 resource information is used to characterize a fourth PC5 resource, and the fourth PC5 resource information is used by the first terminal to perform PC5 interface communication after switching from the first base station to the second base station; The fourth PC5 resource includes at least one PC5 resource used for the first terminal to perform PC5 interface communication after switching from the first base station to the second base station, and the fourth PC5 resource includes the first PC5 resource. 10. The method according to claim 9, characterized in that when the first PC5 resource includes at least two PC5 resources used for the first terminal to perform PC5 interface communication during the process of switching from the first base station to the second base station; The first terminal performs PC5 interface communication in a process of switching from the first base station to the second base station according to the first PC5 resource information, including: The first terminal selects a PC5 resource from the first PC5 resources; The first terminal uses the selected PC5 resource to perform PC5 interface communication during the process of switching from the first base station to the second base station. 11. The method according to claim 9 or 10, characterized in that the method further comprises: The first terminal sends first information to the first base station, where the first information is used for the first terminal to perform PC5 interface communication before switching from the first base station to a second base station. 12. The method according to claim 11, characterized in that the method further comprises: The first terminal receives indication information from the first base station, where the indication information is used to instruct reporting of the first information. 13. The method according to claim 10, characterized in that the method further comprises: The first terminal sends target resource information to the second terminal, where the target resource information is used to represent the selected PC5 resource. 14. A device for wireless communication, comprising: Memory, for storing computer instructions; A processor, configured to execute computer instructions stored in the memory, so that the apparatus for wireless communication performs the method according to any one of claims 1 to 8 or the method according to any one of claims 9 to 13. 15. A computer-readable storage medium, characterized in that a computer program is stored thereon, and when the computer program is executed by a device for wireless communication, the device for wireless communication executes the method as claimed in any one of claims 1 to 8 or the method as claimed in any one of claims 9 to 13.