CN114698041A

CN114698041A - Wireless communication method and device

Info

Publication number: CN114698041A
Application number: CN202011635528.8A
Authority: CN
Inventors: 邢玮俊; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01
Also published as: WO2022143103A1

Abstract

The embodiment of the application provides a wireless communication method, which comprises the following steps: the first base station sends first information to the second base station, wherein the first information is used for the first terminal to carry out PC5 interface communication before the process of 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 is used for representing first PC5 resources, and the first PC5 resources are used for the first terminal to carry out PC5 interface communication 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 as to avoid the situation that the PC5 resource allocated by the second base station is not appropriate.

Description

Wireless communication method and device

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for wireless communication.

Background

In order to enrich the functions of the mobile network, the mobile network adds support for V2X communication. With the development of next generation mobile networks, future V2X communication can support more car networking application scenarios, including vehicle fleet, sensor extension, remote driving, and autonomous driving enhancement, etc. V2X communication may adopt two communication methods: a V2X communication mode of a Uu interface and a V2X communication mode based on a PC5 interface. Among them, V2X communication based on the PC5 interface uses communication resources of the PC5 interface, which may also be referred to as sidelink resources. The sidelink resources are allocated by the base station.

Currently, when a base station allocates sidelink resources for a V2X UE, the base station cannot know QoS requirement information of the traffic of the V2X UE, and therefore, it may happen that the allocated resources cannot meet the communication requirement of the V2X UE. In addition, due to the moving characteristics of the vehicle, cell switching may frequently occur during the driving of the vehicle, and multiple base stations are required to perform resource coordination to allocate a sidelink resource to the V2X UE. Multiple cells may use sidelink resources of the same frequency band. Therefore, the problem of frequent resource switching of the vehicle due to mobility can be avoided, and the communication signaling overhead of the side link is reduced. Therefore, in the switching process of the PC5 interface, a method is designed to realize side link resource optimization.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and a device thereof, so that a second base station (a target base station) can configure a PC5 communication resource for a target cell for a terminal device in advance in the process of switching the base station of the terminal device, and the problem that the PC5 resource allocated by the terminal device in the switching target base station possibly cannot meet the PC5 communication requirement among the terminal devices because the target base station cannot obtain the PC5 interface information of the terminal device is avoided.

In a first aspect, the present application provides a method of wireless communication, the method comprising: the first base station sends first information to the second base station, wherein the first information is used for the first terminal to carry out PC5 interface communication before the process of 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 is used for representing first PC5 resources, and the first PC5 resources are used for the first terminal to carry out PC5 interface communication 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.

Through the technical scheme, the first base station sends the PC5 interface information (including QoS information, SLRB configuration, physical layer channel resource information, communication mode and the like) of the first terminal to the second base station, so that the second base station can configure the PC5 communication resource for the target cell for the first terminal in advance in the switching process of the first terminal, and the problem that the PC5 resource allocated by the second base station possibly cannot meet the PC5 communication requirement among terminal equipment after switching is avoided.

With reference to the first aspect, in certain implementations of the first aspect, the first PC5 resources include at least one PC5 resource for PC5 interface communication by the first terminal during handover 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 base station handover, the resource is selected for communication; when the first PC5 resources include at least two PC5 resources used for the first terminal to perform PC5 interface communication during the base station handover process, one PC5 resource is determined to perform communication according to the quality, priority and other factors of each PC5 resource in the first PC5 resources. The specific determination method is not limited herein.

With reference to the first aspect, in certain implementations of the first aspect, the first information includes at least one of: PC5QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize second PC5 resources, and the second PC5 resources include at least one PC5 resource for PC5 interface communication of the first terminal before the process of handover from the first base station to the second base station.

With reference to the first aspect, in some implementations of the first aspect, the sending, by the first base station, first information includes: the first base station sending a first request message to the second base station, the first request message including the first information, the first request message for requesting to switch the first terminal from the first base station to the second base station; the first base station receives resource information of a first PC5, and the resource information comprises: the first base station receives a first request response message from the second base station, the first request response message including the first PC5 resource information.

With reference to the first aspect, in some implementations of the first aspect, the sending, by the first base station, first information includes: the first base station sending a second request message to an access and mobility management node, the second request message including the first information, the second request message for requesting handover of the first terminal from the first base station to the second base station; the first base station receives resource information of a first PC5, including: the first base station receives the second request response message from the access and mobility management node, the second request response message including the first PC5 resource information.

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

With reference to the first aspect, in some implementations of the first aspect, the first base station receives the first information from the first terminal.

With reference to the first aspect, in some implementation manners of the first aspect, the first base station sends indication information to the first terminal, where the indication information is used to indicate that the first information is reported.

In a second aspect, a method of wireless communication is provided, the method comprising: the second base station receives first information, the first information is used for the first terminal to carry out PC5 interface communication before the process of 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, the first PC5 resource information is used for representing first PC5 resources, and the first PC5 resources are used for the first terminal to carry out PC5 interface communication in the process of switching from the first base station to the second base station.

Through the technical scheme, the second base station receives the PC5 interface information (including QoS information, SLRB configuration, physical layer channel resource information, communication mode and the like) of the first terminal, so that the second base station can configure the PC5 communication resource for the target cell for the first terminal in advance in the switching process of the first terminal, and the problem that the PC5 resource allocated by the second base station possibly cannot meet the PC5 communication requirement among terminal devices after switching is avoided.

With reference to the second aspect, in certain implementations of the second aspect, the first information includes at least one of: PC5QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize second PC5 resources, and the second PC5 resources include at least one PC5 resource for PC5 interface communication of the first terminal before the process of handover from the first base station to the second base station.

With reference to the second aspect, in certain implementations of the second aspect, the first PC5 resources include at least one PC5 resource for PC5 interface communications by the first terminal during handover from the first base station to the second base station.

With reference to the second aspect, in some implementations of the second aspect, the sending, by the second base station, the first PC5 resource information according to the first information includes: the second base station allocates the first PC5 resource to the first terminal according to the first information; the second base station transmits the first PC5 resource information.

Through the scheme, the second base station allocates the first PC5 resource information to the first terminal under the condition that the first information of the first terminal is known, so that the problem that the PC5 resource information configured for the first terminal by the second base station is not appropriate can be avoided.

With reference to the second aspect, in some implementations of the second aspect, the first information includes the PC5QoS information and the second PC5 resource information, and the second base station allocates the first PC5 resources to the first terminal according to the first information, including: the second base station determines third PC5 resource information according to the PC5QoS information of the first terminal, wherein the third PC5 resource information is used for representing third PC5 resources; 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, the first PC5 resource being included in the second PC5 resource and the third PC5 resource.

It should be understood that the third PC5 resource information is PC5 resource information generated by the second base station according to the first information, and the first PC5 resource may be an intersection part of the second PC5 resource information and the third PC5 resource information, or may be the third PC5 resource information and a part of the second PC5 resource information, which is not limited herein.

With reference to the second aspect, in some 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 according to the first information, including: the second base station allocates the first PC5 resource to the first terminal according to the second PC5 resource information, the first PC5 resource being included in the second PC5 resource.

With reference to the second aspect, in some implementations of the second aspect, the receiving, by the second base station, the first information includes: the second base station receiving the first request message from the first base station, the first request message including the first information, the first request message for requesting handover of the first terminal from the first base station to the second base station; the second base station sends the resource information of the first PC5 according to the first information, and the resource information comprises: the second base station transmits a first request response message to the first base station according to the first information, the first request response message including the first PC5 resource information.

With reference to the second aspect, in some implementations of the second aspect, the receiving, by the second base station, the first information includes: the second base station receiving a second request message from an access and mobility management node, the second request message including the first information, the second request message for requesting handover of the first terminal from the first base station to the second base station; the second base station sends the resource information of the first PC5 according to the first information, and the resource information comprises: the second base station transmits a second request response message to the access and mobility management node according to the first information, the second request response message including the first PC5 resource information.

With reference to the second aspect, in certain implementations of the second aspect, the second base station receives the PC5QoS information from the first terminal, the PC5QoS information being used for PC5 interface communication by the first terminal prior to a handover procedure from the first base station to the second base station; the second base station transmits fourth PC5 resource information to the first terminal according to the PC5QoS information, the fourth PC5 resource information being used for characterizing fourth PC5 resources, the fourth PC5 resource information being used for PC5 interface communication by the first terminal after a handover procedure from the first base station to the second base station.

With reference to the second aspect, in certain implementations of the second aspect, the fourth PC5 resources include at least one PC5 resource for PC5 interface communication by the first terminal following a handover procedure from the first base station to the second base station.

With reference to the second aspect, in certain implementations of the second aspect, the fourth PC5 resource comprises the first PC5 resource.

In a third aspect, a method of wireless communication is provided, the method comprising: a first terminal receives first PC5 resource information from a first base station, wherein the first PC5 resource information is used for representing first PC5 resources, and the first PC5 resources are used for conducting PC5 interface communication during the process of switching from the first base station to a second base station; the first terminal performs PC5 interface communication during handover from the first base station to the second base station according to the first PC5 resource information.

Through the technical scheme, the first terminal receives the first PC5 resource information sent by the first base station, the PC5 resource information is a PC5 communication resource which is configured for the first terminal by the second base station according to the PC5 interface information (including QoS information, SLRB configuration, physical layer channel resource information, communication mode and the like) of the first terminal and is used for a target cell, and the problem that the PC5 resource allocated by the second base station possibly cannot meet the PC5 communication requirement between terminal devices after switching is avoided.

With reference to the third aspect, in some implementations of the third aspect, when the first PC5 resources include at least two PC5 resources used for PC5 interface communication by the first terminal in a handover procedure from the first base station to the second base station, the performing, by the first terminal, PC5 interface communication in a handover procedure from the first base station to the second base station according to the first PC5 resource information includes: the first terminal selects a PC5 resource from the first PC5 resources; the first terminal performs PC5 interface communication during handover from the first base station to the second base station using the selected one of the PC5 resources.

With reference to the third aspect, in some implementations of the third aspect, the first terminal sends first information to the first base station, the first information being used for PC5 interface communication by the first terminal before a handover procedure from the first base station to the second base station.

With reference to the third aspect, in some implementations of the third aspect, the first terminal receives indication information from the first base station, where the indication information is used to indicate that the first information is reported.

With reference to the third aspect, in some implementations of the third aspect, the first terminal sends target resource information to the second terminal, the target resource information characterizing the selected one of the PC5 resources.

With reference to the third aspect, in some implementations of the third aspect, the first terminal sends PC5QoS information to the second base station, the PC5QoS information being used for PC5 interface communication by the first terminal prior to a handover procedure from the first base station to the second base station; the first terminal receives fourth PC5 resource information from the second base station, the fourth PC5 resource information being used to characterize fourth PC5 resources, the fourth PC5 resource information being used for PC5 interface communications by the first terminal after a handover procedure from the first base station to the second base station.

With reference to the third aspect, in certain implementations of the third aspect, the fourth PC5 resource includes at least one PC5 resource for PC5 interface communication by the first terminal after a handover procedure from the first base station to the second base station.

Specifically, when the fourth PC5 resource includes only one PC5 resource for PC5 interface communication after the first terminal completes handover 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 handover of the base station, one PC5 resource is determined to perform 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 herein.

With reference to the third aspect, in certain implementations of the third aspect, the fourth PC5 resource includes the first PC5 resource.

In a fourth aspect, an apparatus for wireless communication is provided, the apparatus comprising:

a sending module, configured 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 a process of switching from the first base station to the second base station; a receiving module, configured to receive first PC5 resource information, where the first PC5 resource information is used to characterize first PC5 resources, and the first PC5 resources are used for PC5 interface communication of the first terminal in a process of switching from the first base station to the second base station; the sending module is further configured to send the resource information of the first PC5 to the first terminal.

Based on the beneficial effects of the foregoing schemes, reference may be made to the corresponding description of the first aspect, and for brevity, this application is not described herein again.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first PC5 resources include at least one PC5 resource for PC5 interface communications by the first terminal during handover from the first base station to the second base station.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first information includes at least one of: PC5QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize second PC5 resources, and the second PC5 resources include at least one PC5 resource for PC5 interface communication of the first terminal before the process of handover from the first base station to the second base station.

With reference to the fourth aspect, in some implementations of the fourth aspect, the sending module is specifically configured to: sending a first request message to the second base station, the first request message including the first information, the first request message for requesting handover of the first terminal from the first base station to the second base station; receiving a first request response message from the second base station, the first request response message including the first PC5 resource information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the sending module is further specifically configured to: sending a second request message to an access and mobility management node, the second request message including the first information, the second request message for requesting handover of the first terminal from the first base station to the second base station; receiving the second request response message from the access and mobility management node, the second request response message including the first PC5 resource information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving module is further specifically configured to: the first information is received from the first terminal.

With reference to the fourth aspect, in some implementations of the fourth aspect, the sending module is further specifically configured to: and sending indication information to the first terminal, wherein the indication information is used for indicating to report the first information.

In a fifth aspect, an apparatus for wireless communication is provided, the apparatus comprising: a receiving module, configured to receive first information, where the first 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; a sending module, configured to send first PC5 resource information according to the first information, where the first PC5 resource information is used to characterize first PC5 resources, and the first PC5 resources are used for the first terminal to perform PC5 interface communication during handover from the first base station to the second base station.

Based on the beneficial effects of the foregoing schemes, reference may be made to the corresponding description of the second aspect, and for brevity, this application is not described herein again.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first information includes at least one of: PC5QoS information, and second PC5 resource information; wherein the second PC5 resource information is used to characterize second PC5 resources, and the second PC5 resources include at least one PC5 resource for PC5 interface communication of the first terminal before the process of handover from the first base station to the second base station.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first PC5 resources include at least one PC5 resource for PC5 interface communications by the first terminal during handover from the first base station to the second base station.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the apparatus further includes: a processing module, configured to allocate the resource of the first PC5 to the first terminal according to the first information; the sending module is further configured to send the resource information of the first PC 5.

With reference to the fifth aspect, in some implementations of the fifth aspect, the processing module is further configured to determine third PC5 resource information based on the PC5QoS information, the third PC5 resource information being used to characterize third PC5 resources; allocating the first PC5 resources to the first terminal according to the second PC5 resource information and the third PC5 resource, the first PC5 resources being included in the second PC5 resource and the third PC5 resource.

With reference to the fifth aspect, in some implementations of the fifth aspect, the processing module is further configured to allocate 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.

With reference to the fifth aspect, in some implementations of the fifth aspect, the receiving module is further configured to: receiving the first request message from the first base station, the first request message including the first information, the first request message for requesting handover of the first terminal from the first base station to the second base station; the sending module is further configured to send a first request response message to the first base station according to the first information, where the first request response message includes the resource information of the first PC 5.

With reference to the fifth aspect, in some implementations of the fifth aspect, the receiving module is further configured to: receiving a second request message from an access and mobility management node, the second request message including the first information, the second request message for requesting handover of the first terminal from the first base station to the second base station; the sending module is further configured to send a first request response message to the first base station according to the first information, where the first request response message includes the resource information of the first PC 5.

With reference to the fifth aspect, in some implementations of the fifth aspect, the receiving module is further configured to: receiving the PC5QoS information from the first terminal, the PC5QoS information being for PC5 interface communication by the first terminal prior to the process of handing over from the first base station to the second base station; the sending module is further configured to send fourth PC5 resource information to the first terminal according to the PC5QoS information, where the fourth PC5 resource information is used to characterize fourth PC5 resources, and the fourth PC5 resource information is used for PC5 interface communication of the first terminal after a handover procedure from the first base station to the second base station.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the fourth PC5 resources include at least one PC5 resource for PC5 interface communication by the first terminal following a handover procedure from the first base station to the second base station.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the fourth PC5 resource comprises the first PC5 resource.

In a sixth aspect, an apparatus for wireless communication is provided, the apparatus comprising:

a receiving module, configured to receive first PC5 resource information from a first base station, where the first PC5 resource information is used to characterize first PC5 resources, and the first PC5 resources are used for PC5 interface communication of the first terminal in a process of handover from the first base station to a second base station.

Based on the beneficial effects of the foregoing schemes, reference may be made to the corresponding description of the third aspect, and for brevity, this application is not described herein again.

With reference to the sixth aspect, in certain implementations of the sixth aspect, when the first PC5 resources include at least two PC5 resources for PC5 interface communication by the first terminal during handover from the first base station to the second base station, the apparatus further includes: a processing module for selecting a PC5 resource from the first PC5 resources; using the selected one of the PC5 resources, PC5 interface communications are conducted during handover from the first base station to the second base station.

With reference to the sixth aspect, in some implementations of the sixth aspect, the sending module is specifically configured to: first information is sent to the first base station, the first information being used for the first terminal to conduct PC5 interface communication before the process of switching from the first base station to the second base station.

With reference to the sixth aspect, in some implementations of the sixth aspect, the receiving module is further specifically configured to: and receiving indication information from the first base station, wherein the indication information is used for indicating to report the first information.

With reference to the sixth aspect, in some implementations of the sixth aspect, the sending module is further specifically configured to: sending target resource information to the second terminal, the target resource information characterizing the selected one of the PC5 resources

With reference to the sixth aspect, in some implementations of the sixth aspect, the sending module is further specifically configured to send PC5QoS information to the second base station, where the PC5QoS information is used for PC5 interface communication of the first terminal before a process of switching from the first base station to the second base station; the receiving module is further specifically configured to receive fourth PC5 resource information from the second base station, where the fourth PC5 resource information is used to characterize fourth PC5 resources, and the fourth PC5 resource information is used for the first terminal to perform PC5 interface communication after a process of handover from the first base station to the second base station.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the fourth PC5 resources include at least one PC5 resource for PC5 interface communication by the first terminal after a handover procedure from the first base station to the second base station.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the fourth PC5 resource comprises the first PC5 resource.

In a seventh aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is configured to execute instructions in the memory to implement the communication method in any possible implementation manner of the first to third aspects and the first to third aspects. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface for inputting and/or outputting information. The information includes at least one of instructions 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 system of chips. When the communication device is a chip or a system of chips, the communication interface may be an input/output interface, which may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip or the system of chips, and the like. 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 system of chips configured in the terminal equipment.

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

In an eighth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is configured to execute instructions in the memory to implement the communication method in any possible implementation manner of the first to third aspects and the first to third aspects. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface for inputting and/or outputting information. The information includes at least one of instructions 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 system of chips. When the communication device is a chip or a system of chips, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit, etc. on the chip or the system of chips. 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 system of chips configured in the network device.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

A ninth aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a communication apparatus, causes the communication apparatus to implement the communication method of the first to third aspects and any possible implementation manner of the first to third aspects.

A tenth aspect provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a communication apparatus, causes the communication apparatus to implement the communication method of the first to third aspects and any possible implementation manner of the first to third aspects.

In an eleventh aspect, there is provided a computer program product containing instructions which, when executed by a computer, cause a communication apparatus to implement the communication method provided in the first to third aspects.

In a twelfth aspect, there is provided a computer program product containing instructions that, when executed by a computer, cause a communication apparatus to implement the communication method provided in the first to third aspects.

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

Drawings

Fig. 1 shows an architecture diagram of a 5G V2X communication system suitable for use in embodiments of the present application.

Fig. 2 shows an architecture diagram of a wireless access side suitable for use in embodiments of the present application.

Fig. 3 shows a schematic flow chart of a unicast communication suitable for the embodiments of the present application.

Fig. 4 shows a schematic flowchart of a cell handover performed by a terminal device suitable for this embodiment.

Fig. 5 shows a schematic flow chart of a method 500 for wireless communication provided by an embodiment of the present application.

Fig. 6 shows a schematic flow chart of a method 600 for wireless communication according to 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.

Fig. 8 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 Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The New Radio (NR) of the Fifth Generation (5G) Mobile Communication technology is a global 5G standard designed based on a New air interface of Orthogonal Frequency Division Multiplexing (OFDM), which is also a very important cellular Mobile technology base of the next Generation, and the services of the 5G technology are very diverse and can be oriented to Enhanced Mobile Broadband (eMBB) services, Ultra-reliable Low-Latency Communication (URLLC) services, and mass Machine Communication (mtc) services, wherein the mtc services may be Industrial Wireless Sensor Network (sn) services, Video monitoring (Video) services, and wearable services.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, or a New Radio Network (NR), etc.

Generally, the conventional Communication system supports a limited number of connections and is easy To implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, Device-To-Device (D2D) Communication, Machine-To-Machine (M2M) Communication, Machine Type Communication (MTC), Vehicle networking (Vehicle To evolution, V2X) Communication, for example, Vehicle To Vehicle (V2V) Communication, Vehicle To Infrastructure (V2I) Communication, Vehicle To Pedestrian (V2P) Communication, lane networking (V2N) Communication.

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

A terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may be a Station (ST) in a WLAN, and may be 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 capability, 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 radio, a Wireless modem card, a Set Top Box (STB), a Customer Premises Equipment (CPE) and/or other devices for communicating over a Wireless system, as well as a next generation communication system, such as a terminal device in a 5G Network or a future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) terminal equipment in the network, etc.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application function, and can be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system, the IoT is an important component of future information technology development, and the main technical feature of the IoT is to connect an object with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects.

The network device may include an access network device or a core network device.

The Access network device may be an Access network device or other devices used for communicating with a mobile device, where the Access network device may be an Access Point (AP) in a WLAN, a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, or a gbb in a New Radio system (NR) system, an evolved Node B (eNB, eNodeB) in LTE, or a relay Station or an Access Point, or a Roadside Unit (RSU), or an Access network device in a vehicle-mounted device, a wearable device, and a future 5G network, or an Access network device in a future evolved PLMN network.

In addition, in this embodiment of the present application, the access network device provides a service for a cell, and the terminal device communicates with the access network device through a transmission resource (for example, a time-frequency resource, a frequency resource, or a spectrum resource) used by the cell, where 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 (Small cell), and the Small cell here may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

The core network device may be connected with a plurality of access network devices for controlling the access network devices, and may distribute data received from a network side (e.g., the internet) to the access network devices.

The functions and specific implementations of the terminal device, the access network device and the core network device listed above are merely exemplary illustrations, and the present application is not limited thereto.

The terminal device or the network device may include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU) and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), 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 comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. In addition, the embodiment of the present application does not particularly limit a specific structure of the execution main body of the method, for example, the execution main body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling a program and executing the program in the terminal device or the network device.

Moreover, various aspects or features of embodiments of the 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 is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash Memory devices (e.g., Erasable Programmable Read-Only Memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

It should be noted that, in the application layer, a plurality of applications may run, and in this case, the application executing the communication method according to the embodiment of the present application and the application controlling the receiving device to complete the action corresponding to the received data may be different applications.

To enrich the functionality of mobile cellular networks, 3GPP (Third Generation Partnership Project) has added support for V2X communication, primarily to provide services for security-like application messaging in the internet of vehicles. With the development of the next generation of 5G mobile networks, future 5G V2X communication can support more car networking application scenarios, including vehicle fleet, sensor extension, remote driving and automatic driving enhancement, etc.

Fig. 1 is a diagram of a 5G V2X communication system architecture suitable for use in embodiments of the present application. As shown in fig. 1, within the 5G core network ring, are 5G core network elements, and different network elements are connected by using a service interface. The UE adopts a PC5 interface for direct communication, and the UE and the base station adopt a Uu interface for communication. Fig. 2 is a diagram of a wireless access side shelf. As shown in fig. 2, interfaces of the Access network element or device and an Access and mobility management function (AMF) and the AMF and the Access network element or device communicate with each other through an N2 interface, the Access network element or device communicates with each other through an Xn interface, the Access network element or device under the control of the same AMF is switched to Xn handover (there is a possibility that the AMF is not replaced) by the UE, and the Access network element or device under the control of different AMFs is switched to N2 handover (there is a possibility that the AMF is replaced) by the UE.

The access and mobility management function is one of core network functions of a 5G core network, and is logically interconnected with the gNodeB through an NG interface, and is mainly used for realizing the access management function.

Before performing the V2X Sidelink communication, the terminal device may configure a Sidelink Radio Bearers (SLRB) corresponding to the service characteristic parameters. The Service characteristic parameter may include Quality of Service (QoS), among others. In the LTE system, QoS of a UE Packet is guaranteed by PPPP (ProSe Per Packet Priority) and PPPR (ProSe Per Packet Reliability). For each data packet, the PPPP and PPPR are determined by the application layer, the PPPP and PPPR may each be an integer from 1 to 8, the higher the number, the lower the priority and reliability requirements, and the PPPP and PPPR of the data packet are set when the application layer delivers the data packet to the underlying layer for transmission. And the mapping of the data packet to the SLRB is finished by the terminal, and the specific mapping rule is determined by the terminal.

QoS may refer to a network that can provide better service capability for a given network communication by using various basic technologies, and is a security mechanism of the network, which is a technology for solving the problems of network delay and congestion, and the guarantee of QoS is very important for a network with limited capacity.

The QoS model based on data flow is used for link-aware unicast, multicast and broadcast. For a UE in Radio Resource Control (RRC) connected state, for a new PC5QoS data flow, the UE may report QoS information of the data flow through RRC dedicated signaling, and the network device may provide, based on the QoS information reported by the UE, SLRB configuration through RRC dedicated signaling and configure a corresponding relationship between the data flow and the SLRB. For the UE in the RRC idle state, the network device may provide SLRB configuration through a V2X dedicated System message Block (SIB) and configure mapping of PC5QoS and SLRB. For out-of-coverage UEs, the SLRB configuration and mapping of PC5QoS to SLRB is pre-configured.

In the 5G system, the QoS of the terminal packet is based on a QoS flow mechanism with a Guaranteed Bit Rate (GBR) or a non-guaranteed bit rate (non-GBR), and an SDAP (Service Data Adaptation Protocol) layer is introduced for completing the mapping of the QoS flow to the RB. The PC5QoS flow is identified by a QoS flow Identification number (PFI, PC5QoS flow Identification), and the PC5QoS flow can be mapped to the SLRB of the Access Stratum (AS). One or more PC5QoS flows may map to the same SLRB, but one PC5QoS flow may map to only one SLRB. The QoS characteristics of the packets on the same PC5QoS flow are the same, and the mapping of PC5QoS to PC5QoS flows is done by the end devices.

In the 3GPP R14 and later R15 standards, V2X communication based on a PC5 communication interface transmits a V2X message only in a broadcast communication manner, and a specific communication flow is as follows:

the application layer of V2X UE sends the broadcast message Packet to the Access layer (AS) through the V2X layer according to its QoS requirement, the Priority (PPPP) and Reliability (PPPR) of the Packet. 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 according to the PPPP and PPPR information. The concept of resource pool here is: the UE may use a set of time domain or frequency radio resources.

Currently, 3GPP has already established communication flows for three PC5 communication modes, namely unicast communication, multicast (or referred to as multicast) and broadcast respectively, taking unicast communication as an example, fig. 3 is a schematic flow chart of unicast communication suitable for the embodiment of the present application. As shown in fig. 3, the specific steps are as follows:

s301, the terminal equipment requests service authorization and supply to the base station and the 5G core network.

The terminal device can use the PC5QoS rule and the PC5QoS profile for service authorization and provisioning, and the terminal device is provided with the PC5QoS profile of each PC5QoS flow.

S302, the terminal device sends the data to be sent and the QoS requirement corresponding to the data to be sent from the application layer to the V2X layer.

The application layer of the terminal device may send the data packet to be sent and the QoS requirement corresponding to the data packet to the V2X layer.

S303, the terminal device maps the QoS requirement of the application layer to a specific QoS parameter.

The selection of the QoS parameters depends on the requirements of the V2X application at the application layer for V2X communication, and specifically includes: delay, packet loss rate, bandwidth and distance (Range). Unlike conventional cellular communications (communications between handsets and base stations), the QoS parameter is added with a distance parameter, which is a minimum communication distance that can guarantee that the receiving node meets other QoS requirements (i.e., other QoS parameter indexes besides Range parameter), in addition to the standardized PQI (PC 55G QoS Identifier ) and other parameters such as rate. The V2X layer distributes these packets into corresponding PC5QoS flows according to preconfigured QoS rules, each PC5QoS Flow being identified by a PFI (PC 5QoS Flow Identifier, PC5 quality of service Flow Identifier).

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

The V2X layer may send the packet and its corresponding PFI together with the QoS parameter corresponding to the PFI to the AS layer.

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

After the AS layer receives the data packet to be sent by the upper layer and the QoS parameter corresponding thereto, the terminal device may apply for the radio resource to the base station, and may carry QoS configuration information (including PFI, PQI corresponding to the QoS flow, and other QoS parameters). The base station performs SLRB (Sidelink Radio Bearer) configuration for the terminal device according to the QoS parameter, and sends the configuration information to the terminal device.

Fig. 4 is a schematic flowchart of a cell handover performed by the terminal device according to this embodiment. As shown in fig. 4, the specific steps are as follows:

s401, the terminal equipment sends a measurement report to the source base station.

The terminal device sends a measurement report (including information such as quality and strength of a radio resource channel used by the terminal device) to the source base station periodically in a communication process, and the source base station can determine whether a handover process of the terminal device can be initiated according to the measurement report sent by the terminal device.

S402, the source base station sends a switching request to the target base station.

The target base station may be selected according to the location of the terminal device, or a base station with the strongest detected signal strength is selected from measurement reports reported by the terminal device, or a base station with a lower load is selected for load balancing among base stations, and the selection of the specific target base station is not limited herein.

S403, the target base station sends switching feedback to the source base station.

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

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

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

S405, the terminal equipment and the target base station carry out switching operation.

After receiving the RRC reconnection indication, the terminal device may perform a handover operation from the source base station to the target base station.

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

The RRC connection completion indication information is used for indicating that the RRC connection between the terminal equipment and the target base station is completed. S407, the target base station sends the new resource pool to the terminal equipment.

After the terminal device completes the handover operation from the source base station to the target base station, the target base station may allocate a communication resource pool of the PC5 interface for the terminal device to use in the coverage area of the target base station, and send the new resource pool to the terminal device.

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

1. optionally, the source base station sends an additional resource pool to the terminal device along with the handover command for use in 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: the terminal device includes information such as an X2 signaling message (X2 is an interface between 4G base stations and corresponds to an Xn interface of 5G) of a source base station, an S1 signaling message (S1 is an interface between a 4G base station and a mobility management entity or a serving gateway and corresponds to an NG interface of 5G), a target base station identifier, security key information, an RRC message, E-RAB information (E-UTRAN Radio Access Bearer, including network layer and transport layer address information and QoS configuration information). It can be seen that only the information related to the communication between the UE and the base station, i.e. the information of the Uu (interface between the terminal equipment and the UTRAN) interface (e.g. the radio bearer information of the Uu interface for the E-RAB), is included in the information, and there is no related bearer information of the PC 5.

In summary, when the target base station sends the new resource allocation to the terminal device, it cannot know the PC5QoS requirement information of the service used by the terminal device (i.e. PC5QoS Profile, PC5QoS allocation). Therefore, when the target base station allocates the communication resource of the PC5 to the terminal device, a situation may occur in which the allocated resource cannot satisfy the communication demand of the terminal device.

On the other hand, due to the nature of vehicle movement, cell switching may occur frequently during vehicle travel.

In view of the fact that, unlike the Uu interface communication method, the PC 5-based V2X communication uses sidelink resources, that is, by performing resource coordination by a plurality of base stations through reasonable resource allocation, a plurality of cells can use sidelink resources of the same frequency band. Therefore, the problem of frequent resource switching of the vehicle due to mobility can be avoided, and the communication signaling overhead of the side link is also reduced (because the side link signaling message can be sent to inform the opposite receiving node when the sending node switches the side link resource). Therefore, the method is designed to achieve the effect of optimizing side link resources in the switching process of the PC 5.

It should be understood that, in the embodiments of the present application, for the sake of distinction and without loss of generality, the first base station is used to represent a source base station, the second base station is used to represent a target base station, and the second terminal device is used to represent a peer terminal device.

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

S501, the first base station sends first information to the second base station.

Wherein the first information may be used for the PC5 interface communication by the first terminal prior to the process of handing over from the first base station to the second base station.

Specifically, the process of the first base station switching to the second base station may be preceded by a process that the first terminal has not started to perform the inter-base station handover, for example, in connection with fig. 4, before step 405.

Optionally, the first information includes at least one of PC5QoS information, and second PC5 resource information.

Where the PC5QoS information is used for PC5 interface communication by the first terminal prior to the process of handover from the first base station to the second base station, the PC5QoS information adds a distance parameter, which is the minimum communication distance that can guarantee the receiving node to meet other QoS requirements (i.e., other QoS parameter indicators besides Range parameters), in addition to the standardized PQI and other parameters such as rate. The resource information of the second PC5 is used to represent the resource of the second PC5, for example, the resource of the second PC5 may be SLRB configuration information and a corresponding SLRB identifier, where the SLRB configuration may include RLC (Radio link control ) layer configuration (retransmission mechanism, etc.), Media Access Control (MAC) layer configuration (communication band mapping, Radio resource scheduling information, etc.), physical layer configuration (used Radio channel band, etc.), and the SLRB configuration information may include logical channel identifier information, frequency band identifier information of MAC layer scheduling data to the physical layer, etc., which is not limited herein.

Wherein the second PC5 resources may include at least one PC5 resource for PC5 interface communications of the first terminal prior to a handover procedure from the source base station to the target base station. The second PC5 resources may be allocated by the first base station for the first terminal. The second PC5 resource may be a resource pool that may include one or more PC5 resources.

The PC5 resource can be used for carrying data of the PC5 interface. Specifically, the PC5 resource may be a communication band of a physical layer, without limitation. The communication frequency band may be a combination of a plurality of communication frequency bands (i.e., a resource pool), or may be a specific communication frequency band, which is not limited.

It should be noted that the first base station may configure the second PC5 resource (i.e., resource pool) for the first terminal through a static configuration or a dynamic configuration. Further, when the first terminal transmits data of a certain service, the first terminal may select a communication frequency band from the second PC5 resource for carrying the data of the service according to a QoS requirement (parameter) 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 handover the first terminal from the first base station to the second base station.

Wherein the first request message may include the first information.

Alternatively, the first base station may send the second PC5 resource to the first terminal, the second PC5 resource acquired by the first base station by the first terminal includes 8 different communication bands, and the first terminal may determine whether a frequency band is occupied according to an occupancy rate (a time ratio that a received power of a certain frequency band is greater than a certain threshold in a unit time) of the 8 frequency bands monitored in the wireless information, or determine whether the frequency band can meet a QoS requirement according to a detection of a channel quality of the frequency band (for example, a QoS requirement for a certain communication distance may have a corresponding received power threshold, and different communication distances may correspond to different received power thresholds). And, 1 of the 8 communication bands can be selected for communication according to a certain criterion (the application is not limited herein).

It should be appreciated that when the second PC5 resource includes only one PC5 resource for PC5 interface communications of the first terminal prior to the process of handing over from the source base station to the target base station, then that resource is the PC5 resource for PC5 interface communications of the first terminal prior to the process of handing over from the source base station to the target base station; or, when the second PC5 resource includes at least two PC5 resources used for the first terminal to perform PC5 interface communication before the process of handing over from the source base station to the target base station, then one PC5 resource is selected from the second PC5 resources as the PC5 resource for the first terminal to perform PC5 interface communication before the process of handing over from the source base station to the target base station, for example, the PC5 resource with the best quality or the highest priority is selected from the second PC5 resources, which is not limited herein.

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

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 indicate the first terminal to report the first information.

In another possible implementation manner, when the first terminal performs handover between base stations through the core network, the first base station may send the 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 handover of the first terminal from the first base station to the second base station.

And S502, the second base station sends the 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 resource information of the first PC5 according to the first information, and then send the resource information of the first PC5 to the first base station.

Specifically, the second base station may determine the first PC5 resource information according to the PC5QoS information or the second PC5 resource information included in the first information. For example, when the first information includes PC5QoS information and second PC5 resource information, first, the second base station determines third PC5 resource information according to the PC5QoS information, the third PC5 resource information is used for characterizing a third PC5 resource, the third PC5 resource includes at least one PC5 resource satisfying the PC5QoS information, second, the second base station may allocate a first PC5 resource to the first terminal through the second PC5 resource and the third PC5 resource, the first PC5 resource may be an intersection portion of the second PC5 resource information and the third PC5 resource information, or may be the third PC5 resource information and a portion of the second PC5 resource information, which is not limited herein; alternatively, when the first information includes only 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, the first PC5 resource being included in the second PC5 resource; alternatively, when the first information includes only the PC5QoS information, the second base station may allocate the first PC5 resources to the first terminal according to the PC5QoS information.

The resource information of the first PC5 is used to represent resources of a first PC5, the resources of the first PC5 are used for the first terminal to perform PC5 interface communication in the process of switching from the first base station to the second base station, and the process of switching from the first base station to the second base station for the first terminal may use the reconfiguration from the RRC connection of the first terminal as a starting point and the completion of the RRC connection with the second base station as an ending point. For example, in connection with fig. 4, in the process of steps 405 to 406.

It should be understood that the first PC5 resource information may be SLRB configuration information and a corresponding SLRB identity. 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 band mapping, radio resource scheduling information, etc.), physical layer configuration (information such as used radio channel band), and the SLRB configuration information may include logical channel identifier information, frequency band identifier information of MAC layer scheduling data to physical layer, etc., which is not limited herein.

Note that, when there is a QoS requirement of the PC5, the third PC5 resource includes a resource that satisfies the QoS requirement. For example, when the QoS requirement includes a Guaranteed Flow Bit Rate (GFBR), the third PC5 resource may guarantee to support at least a transmission rate corresponding to the GFBR value; when the QoS requirement includes a transmission distance, the third PC5 resource can ensure that other QoS parameters within the transmission distance value are satisfied, for example, when the QoS parameter is PQI ═ 1, and the transmission distance (Range) ═ 500 m, the QoS requirement is that the data transmission of 500 m can ensure a packet delay budget of 20 ms, 10 ms, and the data transmission of 500 m^-4The packet error rate of.

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

It should be noted that, when the first terminal performs handover between base stations through the core network, 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 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 resource information of the first PC 5.

Through the scheme, the second base station can acquire the PC5 resource of the first terminal before the base station is switched, and the second base station determines the first PC5 resource, namely the PC5 resource of the first terminal for communication in the process of switching the base station, so that the second base station can allocate the PC5 resource for the first terminal in advance for communication.

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

Wherein the first base station may transmit the first PC5 resource information to the first terminal after receiving the first PC5 resource information transmitted by the second base station.

Further, after receiving the first PC5 resource information, the first terminal may select one PC5 resource from the first PC5 resources represented by the first PC5 resource information as a target PC5 resource, and further perform PC5 interface communication in a process of handing over the first terminal from the first base station to the second base station through the target PC5 resource. In addition, the first terminal may also transmit the first PC5 resource information to the second terminal, so that the first terminal and the second terminal communicate through the first PC5 resource in 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 for the first terminal to perform PC5 interface communication during handover from the first base station to the second base station.

Illustratively, when the first PC5 resource includes only one PC5 resource for the first terminal to communicate on the PC5 interface during handover from the first base station to the second base station, then the first terminal communicates using the resource; alternatively, when the first PC5 resources include at least two PC5 resources for the first terminal to perform PC5 interface communication during handover from the first base station to the second base station, then the first terminal may select one PC5 resource from the first PC5 resources for the first terminal to perform PC5 interface communication during handover from the first base station to the second base station. Specifically, the PC5 resource may be selected according to the quality or priority of each PC5 resource in the first PC5 resource, which is not limited herein.

It should be understood that when the first terminal is about to transmit data of a certain service, the first terminal may select one PC5 resource from the first PC5 resources for carrying the data of the service according to a QoS requirement (parameter) corresponding to the data. For example, assuming that the first PC5 resource includes 8 different communication bands, the first terminal may determine whether the band is occupied according to the occupancy of the 8 bands in the wireless information, or determine whether the band can satisfy the QoS requirement according to the channel quality of the band. And, 1 of the 8 communication bands can be selected for communication according to a certain criterion (the application is not limited herein).

It will also be appreciated that when the first terminal performs an inter-base station handover through the core network, the first base station receives a second request response message from the access and mobility management node, the second request response message including the first PC5 resource information.

Alternatively, the second base station may receive PC5QoS information from the first terminal, the PC5QoS information being used for PC5 interface communication by the first terminal before a handover procedure from the first base station to the second base station, the second base station transmitting fourth PC5 resource information to the first terminal according to the PC5QoS information, the fourth PC5 resource information being used for characterizing a fourth PC5 resource, the fourth PC5 resource information being used for PC5 communication by the first terminal after the handover procedure from the first base station to the second base station. For example, in connection with FIG. 4, after step 406.

Wherein the fourth PC5 resources may include at least one PC5 resource for the first terminal to conduct PC5 interface communications after the process of handing over from the first base station to the second base station. Optionally, the fourth PC5 resource comprises a first PC5 resource. After receiving the fourth PC5 resource information, the first terminal may select one piece of PC5 resource information for communication through factors such as quality and priority of PC5 resources in the fourth PC5 resource, and the specific selection manner is not limited herein.

Through the scheme, the second base station acquires the PC5QoS information of the first terminal, the second base station judges whether the first terminal can continue to use the SLRB configuration of the first base station in the cell covered by the first terminal, and the SLRB configuration which can be continuously used and the first PC5 resource allocated to the first terminal by the second base station, namely the fourth PC5 resource information are sent to the first terminal. Therefore, the first terminal can continuously use part or all of the original SLRB configuration after completing the switching, thereby reducing excessive resource overhead caused by changing the communication resource of the PC5 and carrying out signaling interaction or notification with the second terminal.

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

S601, the first base station sends indication information to the first terminal.

The indication information is used for indicating the first terminal to report the first information. For the description of the first information, reference may be made to the description related to the first information in S501, and for brevity, the description of the present application is not repeated herein.

S602, the first terminal sends the 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 transmit measurement information to the first base station during communication.

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

The first base station may select the second base station for the first terminal according to the measurement information reported by the first terminal, where the selection condition of the second base station is not specifically limited, and the first terminal performs a handover process from the first base station to the second base station.

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

S604, the first base station sends the first information to the second base station.

The first base station may send the first information to the second base station after receiving the first information. Optionally, the first base station may determine that the first terminal has a requirement for cell handover according to the measurement information sent by the first terminal, and send the first information to the second base station.

In one possible implementation manner, the first base station may send a first request message to the second base station, where the first request message is used to request a handover of the first terminal from the first base station to the second base station, and the first request message includes the 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, where for the description of the first PC5 resource and the first PC5 resource information, reference may be made to the related description in S502 above, and for brevity, this application is not described herein again.

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

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

Optionally, the first base station determines that the first terminal can perform cell handover according to the measurement information sent by the first terminal, and sends the first information to the access and mobility management node.

In one manner of possible implementation, the first base station may send a second request message to the access and mobility management node, the second request message requesting handover of the first terminal from the first base station to the second base station, the second request message including the first information.

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

S609, the second base station allocates the first PC5 resource.

And S610, the second base station sends the resource information of the first PC5 to the access and mobility management node according to the first information.

Wherein the second base station may transmit a second request response message to the access and mobility management node, the second request response message including the first PC5 resource information.

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

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

S613, the first terminal apparatus determines the first target PC5 resource information.

The first target PC5 resource information is used to characterize the first target PC5 resource, and after receiving the first PC5 resource information, the first terminal may select one PC5 resource from the first PC5 resource information as the first target PC5 resource, which is used for the first terminal device to perform PC5 interface communication during the handover from the first base station to the second base station. For a specific method for selecting the first target PC5 resource, reference may be made to the above description of selecting one PC5 resource from the first PC5 resources in S503, and for brevity, this application is not described herein again.

S614, the first terminal sends the PC5QoS information to the second base station.

Where the PC5QoS information is used for the first terminal to perform PC5 interface communication before the process of handover from the first base station to the second base station, the PC5QoS information adds a distance parameter, which refers to a minimum communication distance that can guarantee the receiving node to meet other QoS requirements (i.e., other QoS parameter indexes besides the Range parameter), in addition to the standardized PQI and other parameters such as rate. Optionally, the first terminal and the second base station may perform RRC connection, complete time synchronization, and the like. And, after the RRC connection is completed, the first terminal may transmit RRC connection completion indication information to the second base station.

In one possible implementation, the first terminal may send an RRC connection reconfiguration message to the second base station, the RRC connection reconfiguration message including the PC5QoS information.

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

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

Based on the above scheme, in the process of cell handover of the first terminal, the first base station sends PC5 interface information (including QoS information, SLRB configuration, communication mode, etc.) of the first terminal to the second base station, so that the second base station can configure PC5 communication resources for the target cell for the first terminal in advance in the handover process of the first terminal, and thus the PC5 resources allocated by the second base station after handover of the first terminal can meet the PC5 communication requirements among terminal devices.

S616, the second base station sends the fourth PC5 resource information to the first terminal according to the PC5QoS information.

Wherein the fourth PC5 resource information is used to characterize fourth PC5 resources, the fourth PC5 resource information is used for PC5 interface communication of the first terminal after the process of handover from the first base station to the second base station, and the fourth PC5 resources may include at least one PC5 resource used for PC5 interface communication of the first terminal after the process of handover from the first base station to the second base station. Optionally, the fourth PC5 resource comprises a first PC5 resource. After the process of switching from the first base station to the second base station, the first terminal is after the RRC connection between the first terminal and the second base station is established. For example, in connection with FIG. 4, after step 406.

S617, the first terminal device determines the resource information of the second target PC 5.

The second target PC5 resource information is used to characterize a second target resource, the first terminal may select one PC5 resource from the fourth PC5 resource as a second target PC5 resource, and the second target PC5 resource is used for the first terminal to perform PC5 interface communication after the process of handover 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 the process of switching from the first base station to the second base station, the PC5 resource is selected as the second target PC5 resource for communication; alternatively, when the fourth PC5 resource includes at least two PC5 resources for the first terminal to perform PC5 interface communication after the process of handing over from the first base station to the second base station, the first terminal may select one PC5 resource from the fourth PC5 resources as the second target PC5 resource for the first terminal to perform PC5 interface communication after the process of handing over from the first base station to the second base station, and specifically, may select the second target PC5 resource according to the quality or priority of each PC5 resource in the fourth PC5 resource, which is not limited herein.

It should be understood that when the first terminal is about to transmit data of a certain service, the first terminal may select one PC5 resource from the fourth PC5 resources for carrying the data of the service according to a QoS requirement (parameter) corresponding to the data. For example, assuming that the fourth PC5 resource includes 8 different communication bands, the first terminal may determine whether the band is occupied according to the occupancy rate of listening to the 8 bands in the wireless information, or determine whether the band can satisfy the QoS requirement according to the channel quality of detecting the band. And, 1 of the 8 communication bands can be selected for communication according to a certain criterion (the application is not limited herein).

S618, the first terminal sends the second target PC5 resource information to the second terminal.

Wherein the first terminal and the second terminal may be caused to communicate using the second target PC5 resource after a handover procedure of the first terminal from the first base station to the second base station by the first terminal transmitting the second target PC5 resource information to the second terminal.

S619, the fourth PC5 resource information is stored.

Alternatively, the second base station may store the fourth PC5 resource information, so that the first terminal can directly use the PC5 resource information of the first terminal in the next inter-base station handover process.

Based on the above scheme, the second base station acquires the PC5 interface information of the first terminal including the SLRB configuration of the first terminal, determines whether the first terminal can continue to use the SLRB configuration of the first base station in the cell covered by the second base station, and transmits the PC5 interface communication resource allocated to the first terminal by the second base station, along with the SLRB configuration that can continue to be used, to the first terminal. Therefore, the first terminal can continuously use the original SLRB configuration after completing the switching, thereby reducing the resource overhead of signaling interaction or notification with the second terminal due to the change of the PC5 communication resource.

The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic and are intended to fall within the scope of the present application.

It is to be understood that, in the above-described method embodiments, the method and the operation implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) available for the terminal device, and the method and the operation implemented by the network device may also be implemented by a component (e.g., a chip or a circuit) available for the network device.

The method provided by the embodiment of the present application is described in detail above with reference to fig. 5 and 6. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to fig. 7 to 10. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that each network element, for example, the transmitting end device or the receiving end device, includes a corresponding hardware structure and/or software modules for performing each function in order to implement the above functions. Those of skill in the art would appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the functional modules may be divided according to the above method example for the transmitting end device or the receiving end device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and another division manner may be available in actual implementation. The following description will be given taking the example of dividing each functional module corresponding to each function.

Fig. 7 is a schematic block diagram of a communication device provided in an embodiment of the present application. The communication device 700 comprises a receiving unit 710, a transmitting unit 720 and a processing unit 730. The receiving unit 710 may implement a communication function of receiving, the transmitting unit 720 may implement a communication function of transmitting, and the processing unit may implement a communication function of live-dead-line processing. The receiving unit 710 and the transmitting unit 720 may also be referred to as communication interfaces or communication units.

Optionally, the communication apparatus 700 may further include a storage unit, which may be configured to store instructions and/or data, and the processing unit 730 may read the instructions and/or data in the storage unit, so as to enable the communication apparatus to implement the foregoing method embodiments.

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

The communication apparatus 700 may be configured to perform the actions performed by the terminal device in the foregoing method embodiments, in this case, the communication apparatus 700 may be a terminal device or a component configurable in the terminal device, the receiving unit 710 is configured to perform the operations related to receiving at the terminal device side in the foregoing method embodiments, the sending unit 720 is configured to perform the operations related to sending at the terminal device side in the foregoing method embodiments, and the processing unit 730 is configured to perform the operations related to processing at the terminal device side in the foregoing method embodiments.

Alternatively, the communication apparatus 700 may be configured to perform the actions performed by the network device in the foregoing method embodiments, in this case, the communication apparatus 700 may be a network device or a component configurable in the network device, the receiving unit 710 is configured to perform the receiving related operations on the network device side in the foregoing method embodiments, and the sending unit 720 is configured to perform the sending related operations on the network device side in the foregoing method embodiments.

As a design, the communication apparatus 700 is configured to perform the actions performed by the first terminal in the embodiment shown in fig. 5, and the receiving unit 710 is configured to: and S503.

As an example, the communication apparatus 700 is configured to perform the actions performed by the first terminal in the embodiment shown in fig. 6, and the receiving unit 710 is configured to: s601, S610, S613; the sending unit 720 is configured to: s602, S603, S611, S612 and S614; the processing unit 730 is configured to: s613, S617.

As yet another example, the communication apparatus 700 is configured to perform the actions performed by the second terminal in the embodiment shown in fig. 6, and the receiving unit 710 is configured to: and S612 and S614.

The communication device 700 may implement the steps or flows corresponding to those performed by the first terminal or the second terminal in the

methods

500 and 600 according to the embodiments of the present application, and the communication device 700 may include means for performing the methods performed by the first terminal or the second terminal in the

methods

500 and 600 in fig. 5 and 6. Also, the units and other operations and/or functions described above in the communication apparatus 700 are respectively for implementing the corresponding flows of the method 500 in fig. 5 and the method 600 in fig. 6.

Wherein, when the communication apparatus 700 is configured to execute the method 500 in fig. 5, the receiving unit 710 is configured to execute step 503 in the method 500.

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

When the communication apparatus 700 is used as a second terminal for performing the method 600 in fig. 6, the receiving unit 710 may be used for performing the steps 612, 614 in the method 600.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

In another design, the communication apparatus 700 is configured to perform the actions performed by the first base station in the embodiment shown in fig. 5, and the receiving unit 710 is configured to: s502; the sending unit 720 is configured to: s501 and S503.

As an example, the communication apparatus 700 is configured to perform the actions performed by the second base station in the embodiment shown in fig. 5, and the receiving unit 710 is configured to: s501; the sending unit 720 is configured to: and S502.

As yet another example, the communication apparatus 700 is configured to perform the actions performed by the first base station in the embodiment shown in fig. 6, and the receiving unit 710 is configured to: s602, S603, S605 and S609; the sending unit 720 is configured to: s601, S604, S606, S610.

As yet another example, the communication apparatus 700 is configured to perform the actions performed by the second base station in the embodiment shown in fig. 6, and the receiving unit 710 is configured to: s604, S607, S611; the sending unit 720 is configured to: s605, S608, S613; the processing unit 730 is configured to: s605 and S609.

The communication device 700 may implement steps or flows corresponding to those 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 units for performing the methods performed by the first base station or the second base station in the method 500 in fig. 5 and the method 600 in fig. 6. Also, the units and other operations and/or functions described above in the communication apparatus 700 are respectively for implementing the corresponding flows of the method 500 in fig. 5 and the method 600 in fig. 6.

As shown in fig. 8, an embodiment of the present application further provides a communication apparatus 800. The communication device 800 comprises a processor 810, the processor 810 being coupled to a memory 820, the memory 820 being adapted to store computer programs or instructions and/or data, the processor 810 being adapted to execute the computer programs or instructions and/or data stored by the memory 820 such that the method in the above method embodiments is performed.

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

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

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

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

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 transmitting signals. For example, processor 810 may be configured to control transceiver 830 to receive and/or transmit signals.

As an approach, the communication apparatus 800 is configured to implement the operations performed by the first terminal or the second terminal in the above method embodiments.

For example, the processor 810 is configured to implement the processing-related operations performed by the first terminal or the second terminal in the above method embodiments, and the transceiver 830 is configured to implement the transceiving-related operations performed by the first terminal or the second terminal in the above method embodiments.

Alternatively, the communication apparatus 800 is configured to implement the operations performed by the first base station or the second base station in the above method embodiments.

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

The embodiment of the present application further provides a communication apparatus 900, where the communication apparatus 900 may be a terminal device or a chip. The communication apparatus 900 may be used to perform the operations performed by the first terminal and the second terminal in the above method embodiments.

When the communication apparatus 900 is a terminal device, fig. 9 shows a simplified structural diagram of the terminal device. As shown in fig. 9, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is primarily used for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds 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 outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 9, and one or more processors and one or more memories may be present in an actual end device product. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device.

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

Alternatively, a device for implementing a receiving function in the transceiving unit 910 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 910 may be regarded as a transmitting unit, that is, the transceiving unit 910 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, or receiving circuit, etc. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

It should be understood that fig. 9 is only an example and not a limitation, and the terminal device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 9.

When the communication device 900 is a chip, the chip includes a transceiver unit and a processing unit. The transceiving unit can be an input/output circuit or a communication interface; 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 apparatus 1000, where the communication apparatus 1000 may be a network device or a chip. The communication apparatus 1000 may be used to perform the operations performed by the network device in the above method embodiments.

When the communication apparatus 1000 is a network device, it is, for example, a base station. Fig. 10 shows a simplified base station structure. The base station includes

portions

1010 and 1020. The 1010 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 1020 part is mainly used for baseband processing, base station control, and the like. Portion 1010 may be generally referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc. Part 1020 is generally a control center of the base station, and may be generally referred to as a processing unit, configured to control the base station to perform the processing operation on the network device side in the foregoing method embodiment.

The transceiver unit of part 1010, which may also be referred to as a transceiver or a transceiver, includes an antenna and a radio frequency circuit, where the radio frequency circuit is mainly used for radio frequency processing. Alternatively, a device for implementing a receiving function in the part 1010 may be regarded as a receiving unit, and a device for implementing a transmitting function may be regarded as a transmitting unit, that is, the part 1010 includes a receiving unit and a transmitting unit. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like, and a transmitting unit may be referred to as a transmitter, a transmitting circuit, or the like.

Section 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 a plurality of single boards exist, the single boards can be interconnected to enhance the processing capability. As an optional implementation, multiple boards may also share one or more processors, or multiple boards share one or more memories, or multiple boards simultaneously share one or more processors.

For example, in one implementation, the transceiver unit of part 1010 is configured to perform steps related to transceiving performed by a first base station and a second base station in the embodiment shown in fig. 5; section 1020 is used to perform steps associated with processing performed by the first base station and the second base station in the embodiment shown in fig. 6.

For example, in yet another implementation, the transceiver unit of part 1010 is configured to perform steps related to transceiving performed by the first base station and the second base station in the embodiment shown in fig. 6; section 1020 is used to perform steps associated with processing performed by the first base station and the second base station in the embodiment shown in fig. 6.

It should be understood that fig. 10 is only an example and not a limitation, and the network device including the transceiving unit and the processing unit may not depend 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. The receiving and sending unit can be an input and output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.

Embodiments of the present application also provide a computer-readable storage medium, on which computer instructions for implementing the method performed by the terminal device or the method performed by the network device in the foregoing method embodiments are stored.

For example, the computer program, when executed by a computer, causes the computer to implement the method performed by the terminal device or the method performed by the network device in the above-described method embodiments.

Embodiments of the present application also provide a computer program product containing instructions, where the instructions, when executed by a computer, cause the computer to implement the method performed by the terminal device or the method performed by the network device in the foregoing method embodiments.

An embodiment of the present application further provides a communication system, where the communication system includes the network device and the terminal device in the foregoing embodiments.

It is clear to those skilled in the art that for convenience and brevity of description, any of the explanations and advantages provided above for relevant contents of any of the communication apparatuses may refer to the corresponding method embodiments provided above, and no further description is provided herein.

In the embodiment of the present application, the terminal device or the 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 may include hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a 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 (processes), 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 may include applications such as a browser, an address book, word processing software, and instant messaging software.

The embodiment of the present application does not particularly limit a specific structure of an execution subject of the method provided by the embodiment of the present application, as long as communication can be performed by the method provided by the embodiment of the present application by running a program in which codes of the method provided by the embodiment of the present application are recorded. For example, an execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling a program and executing the program in the terminal device or the network device.

Various aspects or features of the disclosure 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 is intended to encompass a computer program accessible from any computer-readable device, carrier, or media.

The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. Available media (or computer-readable media) may include, for example but not limited to: magnetic or magnetic storage devices (e.g., floppy disks, hard disks (e.g., removable hard disks), magnetic tapes), optical media (e.g., compact disks, CD's, Digital Versatile Disks (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memories (EPROM), cards, sticks, or key drives, etc.), or semiconductor media (e.g., Solid State Disks (SSD), usb disks, read-only memories (ROMs), Random Access Memories (RAMs), etc.) that may store program code.

Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to: wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) 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), and may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM). For example, RAM can be used as external cache memory. 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 SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct bus RAM (DR RAM).

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

It should also be noted that the memory described herein is intended to comprise, without being 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 apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. Furthermore, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement the scheme provided by the application.

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

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof.

When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. For example, the computer may be a personal computer, a server, or a network appliance, among others. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. With regard to the computer-readable storage medium, reference may be made to the above description.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims and the specification.

Claims

1. A method of wireless communication, comprising:

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 a first terminal to conduct PC5 interface communication before the process of 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 is used for representing first PC5 resources, and the first PC5 resources are used for the first terminal to carry out PC5 interface communication in the process of switching from the first base station to the second base station;

and the first base station sends the first PC5 resource information to the first terminal.

2. The method of claim 1, wherein the first PC5 resources comprise at least one PC5 resource for PC5 interface communications by the first terminal during handover from the first base station to the second base station.

3. The method according to claim 1 or 2, wherein the first information comprises at least one of the following information: PC5 quality of service, QoS, information, and second PC5 resource information;

wherein the second PC5 resource information is used to characterize second PC5 resources, and the second PC5 resources include at least one PC5 resource for PC5 interface communication of the first terminal before the process of switching from the first base station to the second base station.

4. The method according to any of claims 1 to 3, wherein the first base station transmits first information comprising:

the first base station sending a first request message to the second base station, the first request message including the first information, the first request message being used for requesting to switch the first terminal from the first base station to the second base station;

the first base station receives resource information of a first PC5, and the resource information comprises:

the first base station receives a first request response message from the second base station, the first request response message including the first PC5 resource information.

5. The method according to any of claims 1 to 3, wherein the first base station transmits first information comprising:

the first base station sending a second request message to an access and mobility management node, the second request message including the first information, the second request message for requesting handover of the first terminal from the first base station to the second base station;

the first base station receives the second request response message from the access and mobility management node, the second request response message including the first PC5 resource information.

6. The method according to any one of claims 1 to 5, further comprising:

the first base station receives the first information from the first terminal.

7. The method of claim 6, further comprising:

and the first base station sends indication information to the first terminal, wherein the indication information is used for indicating to report the first information.

8. A method of wireless communication, comprising:

the second base station receives first information, wherein the first information is used for the first terminal to carry out PC5 interface communication before the process of switching from the first base station to the second base station;

and the second base station sends first PC5 resource information according to the first information, wherein the first PC5 resource information is used for representing first PC5 resources, and the first PC5 resources are used for the first terminal to carry out PC5 interface communication in the process of switching from the first base station to the second base station.

9. The method of claim 8, wherein the first information comprises at least one of: PC5QoS information, and second PC5 resource information;

wherein the second PC5 resource information is used for characterizing second PC5 resources, and the second PC5 resources include at least one PC5 resource used for PC5 interface communication of the first terminal before the process of switching from the first base station to the second base station.

10. The method of claim 8 or 9, wherein the first PC5 resources comprise at least one PC5 resource for PC5 interface communication by the first terminal during handover from the first base station to the second base station.

11. The method according to any of claims 8 to 10, wherein the second base station sends first PC5 resource information according to the first information, comprising:

the second base station allocates the first PC5 resource to the first terminal according to the first information;

and the second base station sends the resource information of the first PC 5.

12. The method of claim 11, wherein the first information comprises the PC5QoS information and the second PC5 resource information, and wherein the second base station allocates the first PC5 resources for the first terminal according to the first information, comprising:

the second base station determines third PC5 resource information according to the PC5QoS information, wherein the third PC5 resource information is used for representing third PC5 resources;

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, and the first PC5 resource includes the second PC5 resource and the third PC5 resource.

13. The method of claim 11, wherein the first information comprises the second PC5 resource information, and wherein 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, and the first PC5 resource is included in the second PC5 resource.

14. The method according to any of claims 8 to 13, wherein the second base station receives first information comprising:

the second base station receiving the first request message from the first base station, the first request message including the first information, the first request message for requesting handover of the first terminal from the first base station to the second base station;

the second base station sends the resource information of the first PC5 according to the first information, and the resource information comprises the following steps:

and the second base station sends a first request response message to the first base station according to the first information, wherein the first request response message comprises the resource information of the first PC 5.

15. The method according to any of claims 8 to 13, wherein the second base station receives first information comprising:

the second base station receiving a second request message from an access and mobility management node, the second request message including the first information, the second request message for requesting handover of the first terminal from the first base station to the second base station;

and the second base station sends a second request response message to the access and mobility management node according to the first information, wherein the second request response message comprises the resource information of the first PC 5.

16. The method according to any one of claims 8 to 15, further comprising:

the second base station receiving the PC5QoS information from the first terminal, the PC5QoS information being for PC5 interface communication by the first terminal prior to a handover procedure 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 PC5QoS information, wherein the fourth PC5 resource information is used for representing fourth PC5 resources, and the fourth PC5 resource information is used for PC5 interface communication of the first terminal after the process of switching from the first base station to the second base station.

17. The method of claim 16, wherein the fourth PC5 resource comprises at least one PC5 resource for PC5 interface communications by the first terminal after the handover from the first base station to the second base station.

18. The method of claim 17, wherein the fourth PC5 resource comprises the first PC5 resource.

19. A method of wireless communication, comprising:

a first terminal receives first PC5 resource information from a source base station, 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 a second base station;

the first terminal performs PC5 interface communication in the process of switching from the first base station to the second base station according to the first PC5 resource information.

20. The method of claim 19, wherein when the first PC5 resources include at least two PC5 resources for the first terminal to communicate over the PC5 interface during handover from the first base station to the second base station;

the first terminal performs PC5 interface communication during the process of switching from the first base station to the second base station according to the first PC5 resource information, and comprises the following steps:

the first terminal selects one PC5 resource among the first PC5 resources;

the first terminal performs PC5 interface communication in the process of switching from the first base station to the second base station using the selected one PC5 resource.

21. The method according to claim 19 or 20, further comprising:

the first terminal sends first information to the first base station, wherein the first information is used for the first terminal to carry out PC5 interface communication before the process of switching from the first base station to the second base station.

22. The method of claim 21, further comprising:

and the first terminal receives indication information from the first base station, wherein the indication information is used for indicating to report the first information.

23. The method of any one of claims 20 to 22, further comprising:

and the first terminal sends target resource information to the second terminal, wherein the target resource information is used for representing the selected PC5 resource.

24. The method according to any one of claims 19 to 23, further comprising:

the first terminal sending PC5QoS information to the second base station, the PC5QoS information being used for PC5 interface communication before the process of the first terminal switching from the first base station to the second base station;

the first terminal receives fourth PC5 resource information from the second base station, the fourth PC5 resource information is used for characterizing fourth PC5 resources, and the fourth PC5 resource information is used for PC5 interface communication after the process of switching from the first base station to the second base station.

25. The method of claim 24, wherein the fourth PC5 resource comprises at least one PC5 resource for PC5 interface communications by the first terminal after the handover from the first base station to the second base station.

26. The method of claim 25, wherein the fourth PC5 resource comprises the first PC5 resource.

27. An apparatus for wireless communication, comprising:

a memory for storing computer instructions;

a processor for executing computer instructions stored in the memory to cause the apparatus for wireless communication to perform the method of any of claims 1 to 7 or the method of any of claims 8 to 18 or the method of any of claims 19 to 26.

28. A computer-readable storage medium, having stored thereon a computer program which, when executed by an apparatus for wireless communication, causes the apparatus for wireless communication to perform the method of any of claims 1-7 or the method of any of claims 8-18 or the method of any of claims 19-26.