WO2020001317A1

WO2020001317A1 - V2x communication method, device, and system

Info

Publication number: WO2020001317A1
Application number: PCT/CN2019/091653
Authority: WO
Inventors: 彭文杰; 王君; 戴明增
Original assignee: 华为技术有限公司
Priority date: 2018-06-27
Filing date: 2019-06-18
Publication date: 2020-01-02
Also published as: CN110650454A; CN110650454B

Abstract

Embodiments of the present application provide a V2X communication method, comprising: a first network device sends a request message to a second network device and receives a response message from the second network device, the request message being used for requesting the second network device to configure a V2X resource for a terminal, and the response message comprising V2X resource configuration information, wherein the V2X resource configuration information is used for indicating the V2X resource configured for the terminal; and the first network device sends the V2X resource configuration information to the terminal. In this way, the terminal may receive the V2X resource configuration information, thereby obtaining V2X resources of more cells other than a cell of the first network device, and issues a V2X service by using the V2X resources, thereby increasing the data throughput rate of V2X.

Description

V2X communication method, device and system

This application claims priority from Chinese patent applications filed on June 27, 2018 with the State Intellectual Property Office of China, with the application number 201810706021.3, and the application name "V2X communication method, device and system", the entire contents of which are incorporated herein by reference Applying.

Technical field

The present application relates to the field of communication technologies, and in particular, to a V2X communication method, device, and system.

Background technique

With the development of wireless communication technology, it has been applied in more and more extensive fields. For example, in the field of vehicle communications, vehicle-to-everything (V2X) technology is committed to achieving low latency and high reliability between high-speed devices, between high-speed devices and low-speed devices, or between high-speed devices and stationary devices. Sexual communication. Among them, X may represent a vehicle, a pedestrian, a road facility, or a network, etc. That is, V2X may include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, and vehicle. -Pedestrian-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication, etc.

V2X (vehicle to X) technology is a key technology for future intelligent transportation systems. It enables vehicles to communicate with the outside world to obtain a series of traffic information such as real-time road conditions, road information, and pedestrian information, thereby improving driving safety and reducing congestion. , Improve transportation efficiency, provide on-board entertainment information, etc.

It can be seen that the demand for data throughput of V2X communication is relatively high, and how to enable V2X communication to obtain greater data throughput has become increasingly important.

Summary of the invention

In view of this, the embodiments of the present application provide a V2X communication method, device and system, so as to improve the data throughput rate of V2X.

V2X in this application may be replaced with a side link (SL) or V2X SL.

In a first aspect, a V2X communication method is provided, which is executed by a first network device. The method includes: the first network device sends a request message to the second network device, and receives a response message sent by the second network device. The request message is used to request the second network device to configure V2X resources for the terminal, and the response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate the V2X resources configured for the terminal. The first network device sends the V2X resource configuration information to the terminal.

Accordingly, a V2X communication method is provided, which is executed by a second network device. The method includes: the second network device receives a request message from the first network device, the request message is used to request the second network device to configure a V2X resource for the terminal. The second network device configures a V2X resource for the terminal according to the request message, and sends a response message to the first network device. The response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate the V2X resource configured for the terminal.

Through the above method, the terminal can receive the V2X resource configuration information, thereby obtaining V2X resources of more cells than the cell of the first network device, and using the V2X resources to initiate V2X services, thereby improving the V2X data throughput rate.

The above V2X resources can also be referred to as V2X SL resources or SL resources, which are resources used for terminal-to-terminal communication through the PC5 interface.

In one implementation, the above request message includes V2X information of the terminal. Optionally, the V2X information of the terminal includes one or more of the following information: V2X request indication, V2X authorization information, V2X aggregate maximum bit rate AMBR, V2X capability information, V2X maximum transmit power, and V2X service type information.

The V2X request indication is used to instruct the second network device to allocate V2X resources to the terminal, or used to instruct the second network device to request V2X resource configuration, or used to notify the second network device that the terminal has a V2X service requirement.

V2X authorization information is used to indicate the type of terminal to which the terminal is authorized. The V2X authorization information may be obtained by the first network device from the core network device. When the first network device and the second network device have different radio access technologies (RATs), the first network device and the second network device (or different RAT technologies) may share the same V2X authorization information, or the first network The device and the second network device (or different RAT technologies) use separate V2X authorization information. When different RAT technologies use separate V2X authorization information, the first network device obtains different authorization information from the core network device, which are respectively used for different RAT technologies. At this time, the above method further includes: the first network device obtains the first authorization information and the second authorization information from the core network device, wherein the first authorization information is used for the first network device or for a RAT of the first network device, and the second The authorization information is used for the second network device or the RAT for the second network device; the first network device carries the second authorization information in the request message, that is, the V2X authorization information in the request message is sent to the second network device.

Similar to V2X authorization information, V2X AMBR is obtained by the first network device from the core network device. When the RATs of the first network device and the second network device are different. The first network device and the second network device (or different RAT technologies) may share the same V2X AMBR, or the first network device and the second network device (or different RAT technologies) use separate V2X AMBRs. When different RAT technologies use separate V2X AMBRs, the first network device obtains different AMBRs from the core network device and uses them for different RAT technologies. At this time, the above method further includes: the first network device obtains the first AMBR and the second AMBR from the core network device, where the first AMBR is used for the first network device or for the RAT of the first network device, and the second AMBR is used for The second network device or the RAT used for the second network device; the first network device carries the second AMBR in the request message, that is, the V2X AMBR in the request message is sent to the second network device.

The V2X capability information includes all or part of the capability information reported by the terminal to the first network device.

The V2X maximum transmission power is used to indicate the maximum transmission power allowed for the terminal when using the V2X resources configured by the second network device for V2X communication. When the RATs of the first network device and the second network device are different, the first network device and the second network device may share the maximum transmission power or use independent maximum transmission power. When the first network device and the second network device share the maximum transmission power, the above method further includes: the first network device obtains the maximum transmission power from the terminal, and divides the maximum transmission power for the first network device (or the first network device). A first maximum transmission power of the network device (RAT) and a second maximum transmission power for the second network device (or the RAT of the second network device), the first network device carrying the second maximum transmission power in the request message, That is, it is sent to the second network device as the V2X maximum transmission power in the request message. When the first network device and the second network device use independent maximum transmission power, the above method further includes: the first network device obtains a first maximum transmission for the first network device (or the RAT of the first network device) from the terminal. Power and the second maximum transmission power for the second network device (or the RAT of the second network device), and the second maximum transmission power is carried in the request message, that is, the V2X maximum transmission power in the request message is sent to The second network device.

The V2X service type information may include a V2X service type indication or a V2X quality of service (QoS) parameter, which is used to indicate a V2X service type or QoS requirement. The service types include: 1. IP or non-IP; 2. V2V, V2I, V2N or V2P; 3. Supplier service identifier (PSID) or intelligent transportation system application identifier (ITS-AID). V2X QoS parameters include single packet priority (PPPP) or single packet reliability (PPPR) or QoS flow identification (QFI) or 5G QoS indication (5QI) or priority level, or any combination thereof.

Optionally, the above method further includes: the first network device may further send V2X service type information transferred to the second network device to the terminal. The V2X service type information includes a V2X service type indication or a V2X QoS parameter. The V2X service type information may be carried in the same configuration message as the V2X resource configuration information.

In one implementation, the above V2X resource configuration information includes a side-link wireless network temporary identification (SL-RNTI) and V2X resources. Optionally, the V2X resource configuration information further includes one or more of the following information: V2X synchronization configuration, synchronization reference type configuration, area configuration information, V2X inter-frequency information, SL transmission priority configuration parameters, SL priority, Modulation and coding strategy (MCS), and transmit power.

In one implementation, the above request message is a secondary node (SN) addition request message, and the above response message is an SN addition request confirmation message. That is, in the process of adding a SN to a dual connection (DC), the configuration of V2X resources by the SN is implemented. In the existing DC technology, the configuration of the DC is triggered only when the bearer is to be offloaded to the SN. In this application, for V2X services, since the bearer does not necessarily need to be generated, this principle may not be applicable, that is, the SN addition request process may be triggered in order to support V2X services. Alternatively, a new process can be introduced, similar to the SN adding request process. At this time, the above request message is a new request message, for example, it can be called a V2X / SL request message, etc. In this way, it can be backward compatible without affecting the existing DC mechanism.

In addition, in the existing DC technology, if the terminal uses the air interface resources of the SN, it needs to perform random access with the SN. In this application, if the terminal has no other services besides the V2X service, the SN is only added to support the V2X service, and the synchronization source does not select the SN. At this time, the terminal may not synchronize with the SN, that is, not to the SN Initiate random access.

It can be seen that the configuration of V2X resources by the SN can be completed during the initial configuration of the DC, and then the terminal can use the V2X resources configured by the SN to perform V2X communication, and obtain V2X of more cells than the cell of the master node (MN) Resources to improve V2X data throughput. In this way, while the initial configuration of the DC is completed, V2X resources on the SN are obtained, signaling is saved, and communication efficiency is improved.

In another implementation, the above request message is an SN modification request message, and the above response message is an SN modification request confirmation message. That is, in the dual connection (DC) SN modification process, the configuration of V2X resources by the SN is realized.

In the prior art, the SN modification request message is used to request to modify the configuration of the SN, for example, to request that certain bearers be established on the SN, or to modify the SCG bearer, the SCG part of the split bearer, or to request the addition or release of an SCG cell. Wait. In this embodiment, the SN may be requested to update the V2X resource configuration for the terminal. For example, when the terminal updates the frequency information of interest, the MN may inform the SN of the updated frequency information and let the SN change the configuration, that is, the SN is reconfigured for the terminal. V2X resources. For another example, when the MN decides to change the V2X service or V2X QoS assigned to the SN, it informs the SN of the changed V2X service or V2X QoS and lets the SN change the configuration, that is, the SN reconfigures the V2X resources for the terminal.

In one implementation, the first network device can interact with other network devices to support V2X, so when selecting the second network device, the first network device can select a network device capable of supporting the V2X function as the second network. Equipment, thereby reducing the possibility that the second network device selected by the first network device for the terminal cannot provide corresponding services when the terminal has a demand for V2X services. At this time, the above method further includes: the first network device receives V2X support information from the second network device; and when the first network device determines that the second network device supports the V2X service according to the V2X support information, sending the second network device to the second network device Request message.

Optionally, the V2X support information may include: V2X capability information, which is used to indicate whether the second network device supports V2X services; or, a V2X service type, which is used to indicate the V2X service type supported by the second network device; or, V2X service quality The QoS parameter is used to indicate the V2X QoS supported by the second network device; or the frequency of providing the V2X service is used to indicate the frequency used by the second network device for the V2X service.

When V2X capability information is used, the first network device can know whether other network devices support V2X services, so when the terminal has V2X service requirements, it selects a network device that supports V2X services as the second network device. For example, in the DC scenario, select Network devices that support V2X services act as SNs. When using the V2X service type, the first network device can know not only whether other network devices support V2X services, but also the type of V2X services supported by other network devices, so as to select a second network device that matches the V2X service type of the terminal. . When the V2X QoS parameter is adopted, the first network device can not only know whether other network devices support V2X services, but also know the V2X QoS level supported by other network devices, so as to select a second network device that matches the terminal V2X QoS level. When using a frequency that provides V2X services, the first network device can not only know whether other network devices support V2X services, but also know the frequencies supported by the second network device. For example, the frequency of the cell under the network device is, for example, 1.8G, but it supports inter-frequency V2X, that is, it supports the allocation of V2X resources of other frequencies to the terminal, such as 5.9G. The first network device can receive the frequency that the terminal is interested in from the terminal, and when selecting the SN, it can judge whether the SN supports the frequency that the terminal is interested in.

In one implementation, the first network device can inform the terminal of its ability to support the configuration of more cell V2X resources for the terminal. This can help the terminal to consider the impact of V2X when selecting a cell to camp on, and when supporting V2X services, You can preferentially choose a cell that has this function. At this time, the above method further includes: the first network device sends notification information to the terminal, and the notification information is used to indicate that the first network device supports a capability of configuring more V2X resources of the cell for the terminal.

Optionally, when the RATs of the first network device and the second network device are different, the notification information is used to indicate the ability of the first network device to support the configuration of a V2X resource of a different system cell for the terminal, that is, to indicate that the first network device supports Ability to configure different systems of V2X services for terminals.

In one implementation, the terminal can report to the network device whether the terminal supports V2X capability information. The capability information can further be the terminal's support capability for NR V2X. The capability information can be reported to the RAN side or to the core. Network side. The capability information may be, for example, a V2X service type. In this way, the network device can configure NR V2X measurement for the terminal or V2XDC for the terminal when it knows that the terminal supports NR V2X or supports DC for V2X. At this time, the above method further includes: the first network device receives V2X capability information from the terminal.

In addition, a V2X communication device is also provided, and when it is used for the first network device, it includes a unit or means for performing each step performed by the first network device in any one of the implementations of the first aspect above; When it is used for the second network device, it includes units or means for performing each step performed by the second network device in any one of the implementations of the first aspect above.

In addition, a V2X communication device is provided, which includes a processor and a memory. The memory is used to store the program, and the processor calls the program in the memory. When it is used in the first network device, it is used to execute any one of the first aspects above. A method performed by a first network device in an implementation; when used in a second network device, used to perform a method performed by a second network device in any one of the implementations of the first aspect above.

In addition, a V2X communication device is provided, which includes a processor and an interface circuit. The interface circuit is used to communicate with other devices. When it is used in a first network device, the processor is used to perform any of the foregoing first aspects. A method implemented by a first network device in an implementation; when it is used in a second network device, the processor is configured to execute the method performed by the second network device in any one of the implementations of the first aspect above.

In addition, a V2X communication device is provided, which is connected to the memory and is used to read and execute the program stored in the memory. When it is used in the first network device, it is used to implement any one of the implementations of the first aspect above. The method executed by the first network device; when used in the second network device, used to implement the method executed by the second network device in any one of the first aspects above.

In addition, a program is provided for implementing the method executed by the first network device in any one of the implementations of the above first aspect when executed by a processor, or used to implement any of the above first aspects. The method executed by the second network device in the implementation.

In addition, a program product, such as a computer-readable storage medium, is provided, including the above program.

In a second aspect, a V2X communication method is provided, which is executed by a first network device and includes: the first network device sends V2X measurement configuration information to a terminal, where the V2X measurement configuration information includes a cell identifier of a second network device, and a second network device The V2X resource information and the V2X measurement event of the cell; the first network device receives the measurement result that the terminal performs measurement and reports according to the V2X measurement configuration information.

Correspondingly, a V2X communication method is provided and executed by a terminal. The method includes: the terminal receives V2X measurement configuration information from a first network device, performs measurement according to the measurement configuration information, and reports a measurement result. The V2X measurement configuration information includes a cell identifier of the second network device, V2X resource information of a cell of the second network device, and a V2X measurement event.

During the measurement process, the terminal determines the cell to be measured according to the cell identifier, obtains the V2X resource location according to the V2X resource information, and measures the V2X resource. When the measurement result meets the requirements of the V2X measurement event, the terminal reports the measurement result.

It can be seen that the network device configures V2X measurement for the terminal to obtain the measurement result of the V2X service quality of the other cell by the terminal, so as to select a suitable cell to provide the terminal with V2X service according to the measurement result, so that the selected cell can satisfy the terminal's service for V2X services. Quality requirements. This method can be combined with the method provided in the first aspect above to further improve the V2X service quality of the terminal on the second network device, thereby improving the V2X data throughput rate.

Optionally, the measurement result is, for example, a channel busy rate (CBR).

Optionally, the measurement result is carried in a measurement report, and the measurement report further includes an identifier of the first cell, where the first cell is a cell whose measurement result satisfies a measurement event.

Optionally, the measurement report may further include a measurement event identifier, which is used to indicate a measurement event satisfied by the measurement result, or is used to indicate a measurement event that triggers the measurement result to be reported.

Optionally, the measurement report may further include a V2X resource reporting identifier, which is used to indicate the V2X resource corresponding to the measurement result. At this time, the V2X measurement configuration information may also include a resource reporting identifier. The resource reporting identifier is used to identify the V2X resource, that is, the terminal may carry the resource reporting identifier when reporting the measurement result, and is used to identify the V2X resource corresponding to the reported measurement result.

In one implementation, the first network device may obtain the cell information of the second network device from the network management device, such as a cell identifier and V2X resource information of the cell, and generate V2X measurement configuration information accordingly.

In another implementation, the first network device may obtain cell information from the second network device, such as a cell identifier and V2X resource information of the cell, and generate V2X measurement configuration information accordingly. At this time, the above method may include: the first network device acquires the cell identifier and the V2X resource information of the cell from the second network device; and the first network device generates the V2X measurement configuration information according to the obtained cell identifier and the V2X resource information of the cell.

The above V2X measurement events include one or more of the following events:

The channel busy rate (CBR) of the V2X resources in the neighboring cell is less than the threshold value or less than or equal to the first threshold value;

The CBR of the V2X resource of the serving cell of the first network device is greater than or equal to the second threshold, and the CBR of the V2X resources of the neighboring cell is less than or equal to the third threshold;

The CBR of the V2X resource of the serving cell of the second network device is greater than or equal to the fourth threshold, and the CBR of the V2X resources of the neighboring cell is less than or equal to the fifth threshold;

The CBR of the V2X resource of the serving cell of the second network device is greater than or equal to a sixth threshold.

In addition, a V2X communication device is provided, which includes units or means for performing each step performed by the first network device in any one of the implementations of the second aspect above.

In addition, a V2X communication device is provided, which includes a processor and a memory. The memory is used to store the program, and the processor calls the program in the memory to execute the method performed by the first network device in any one of the implementations of the second aspect above. .

In addition, a V2X communication device is provided, which includes a processor and an interface circuit, where the interface circuit is configured to communicate with other devices, and the processor is configured to execute the first network device in any of the implementations of the second aspect above. method.

In addition, a V2X communication device is provided, which is connected to the memory and is used to read and execute the program stored in the memory, and is used to implement the method executed by the first network device in any one of the implementations of the second aspect above.

In addition, a program is provided, which when executed by a processor, is used to implement the method executed by the first network device in any one of the implementations of the second aspect above.

In addition, a V2X communication device is provided, which includes units or means for performing each step performed by the terminal in any one of the implementations of the second aspect above.

In addition, a V2X communication device is provided, which includes a processor and a memory. The memory is used to store the program, and the processor calls the program in the memory to execute the method executed by the terminal in any one of the implementations of the second aspect above.

In addition, a V2X communication device is provided, which includes a processor and an interface circuit, where the interface circuit is configured to communicate with other devices, and the processor is configured to execute the method executed by the terminal in any one of the implementations of the second aspect above.

In addition, a V2X communication device is also provided, which is connected to the memory and is used to read and execute the program stored in the memory, and is used to implement the method executed by the terminal in any one of the implementations of the second aspect above.

In addition, a program is provided for implementing the method for terminal execution in any one of the implementations of the second aspect above when executed by a processor.

In the first aspect, the first network device and the second network device may both configure V2X resources for the terminal. Among them, when the V2X resources provided by the first network device to the terminal are insufficient to meet the terminal's business needs, or to meet the throughput requirements, more network devices can be triggered, for example, the second network device configures V2X for the terminal. Resources. In addition, when a terminal has a certain V2X service requirement and the first network device of the V2X service cannot support it, other network devices that can support the service, such as a second network device, can be triggered to configure V2X resources for the terminal. After both the first network device and the second network device have configured V2X resources for the terminal, the terminal can obtain the V2X resources of the first network device and the V2X resources of the second network device. At this time, which network device configuration can be used for service transmission V2X resources are designed to improve the efficiency and throughput of V2X communications. In addition, the matching between the service and the RAT can be improved, which is more conducive to the improvement of communication quality.

Based on this, in a third aspect, a V2X communication method is provided for a communication system in which a first network device and a second network device jointly provide a terminal with a V2X service. The method includes: the terminal determining a target network device, the target network device being The first network device and / or the second network device; the terminal uses V2X resources configured by the target network device to perform V2X communication with other terminals.

The RATs of the first network device and the second network device are different.

In one implementation, the terminal presets a correspondence relationship between a service type and a RAT. At this time, the terminal determining the target network device includes: the terminal determines the target RAT corresponding to the service type according to the service type of the data; and determines the first network device or the second network device whose RAT is the target RAT as the target network device. Alternatively, the terminal presets a correspondence relationship between a quality of service (QoS) parameter and a RAT. At this time, the terminal determines a target network device, including: the terminal determines a target RAT corresponding to the QoS parameter according to the data QoS parameter; The first network device or the second network device is determined as the target network device.

In another implementation, the terminal presets a correspondence relationship between a service type and a network device or a correspondence relationship between a QoS parameter and a network device. At this time, the terminal determining the target network device includes: according to the service type or QoS parameter of the data, the terminal determines that the network device corresponding to the service type or QoS parameter is the target network device.

In another implementation, the network side issues a policy, so that the terminal decides which network device's V2X resources to use according to the policy issued by the network side. At this time, the above method further includes: the terminal receives a policy from the network side, and determines a target network device according to the policy.

Optionally, the policy includes a correspondence between a service type and a RAT or a correspondence between a QoS parameter and a RAT. At this time, the terminal determines the target network device according to the policy, including: the terminal determines the service type of the data or the QoS parameter of the data The target RAT corresponding to the service type or QoS parameter; the first network device or the second network device whose RAT is the target RAT is determined as the target network device.

Optionally, the policy includes a correspondence between a service type and a network device or a correspondence between a QoS parameter and a network device. At this time, the terminal determines the target network device according to the policy, including the terminal's service type based on data or QoS parameters based on data. , Determine the network device corresponding to the service type or QoS parameter as the target network device.

Optionally, the policy includes a threshold value of a QoS parameter. At this time, the terminal determining the target network device according to the policy includes: the terminal determines the target RAT of the data according to the QoS parameter of the data, where the target RAT is the RAT of the first network device when the QoS parameter of the data is greater than a threshold value; When the QoS parameter of the data is less than the threshold, the target RAT is the RAT of the second network device; when the QoS parameter of the data is equal to the threshold, the target RAT is the RAT of the first network device or the second network device. Alternatively, when the QoS parameter of the data is greater than the threshold, the target RAT is the RAT of the second network device; when the QoS parameter of the data is less than the threshold, the target RAT is the RAT of the first network device; when the QoS parameter of the data is equal to When the threshold is set, the target RAT is the RAT of the first network device or the second network device.

Alternatively, the terminal determining the target network device according to the policy includes: the terminal determines the target network device according to the QoS parameters of the data, where the target network device is the first network device when the QoS parameter of the data is greater than a threshold value; when the QoS parameter of the data When it is less than the threshold value, the target network device is the second network device; when the QoS parameter of the data is equal to the threshold value, the target network device is the first network device or the second network device. Alternatively, when the QoS parameter of the data is greater than the threshold, the target network device is the second network device; when the QoS parameter of the data is less than the threshold, the target network device is the first network device; when the QoS parameter of the data is equal to the threshold Value, the target network device is the first network device or the second network device.

Optionally, the policy includes a preset value or a preset range of the QoS parameters.

For example, the strategy includes a first preset value and a second preset value. At this time, the terminal determining the target network device according to the policy includes: the terminal determines the target RAT of the data according to the QoS parameters of the data; and determines that the network device whose RAT is the target RAT is the target network device. Wherein, when the QoS parameter of the data is the first preset value, the target RAT is the RAT of the first network device; when the QoS parameter of the data is the second preset value, the target RAT is the RAT of the second network device. Alternatively, when the QoS parameter of the data is the first preset value, the target RAT is the RAT of the second network device; when the QoS parameter of the data is the second preset value, the target RAT is the RAT of the first network device. Alternatively, the terminal determining the target network device according to the policy includes: the terminal determining the target network device according to the QoS parameters of the data. Wherein, when the QoS parameter of the data is the first preset value, the target network device is the first network device; when the QoS parameter of the data is the second preset value, the target network device is the second network device. Alternatively, when the QoS parameter of the data is the first preset value, the target network device is the second network device; when the QoS parameter of the data is the second preset value, the target network device is the first network device.

As another example, the strategy includes a first preset range and a second preset range. At this time, the terminal determining the target network device according to the policy includes: the terminal determines the target RAT of the data according to the QoS parameters of the data; and determines that the network device whose RAT is the target RAT is the target network device. Wherein, when the QoS parameters of the data are within the first preset range, the target RAT is the RAT of the first network device; when the QoS parameters of the data are within the second preset range, the target RAT is the RAT of the second network device. Alternatively, when the QoS parameters of the data are within the first preset range, the target RAT is the RAT of the second network device; when the QoS parameters of the data are within the second preset range, the target RAT is the RAT of the first network device. Alternatively, the terminal determining the target network device according to the policy includes: the terminal determining the target network device according to the QoS parameters of the data. Wherein, when the QoS parameter of the data is within the first preset range, the target network device is the first network device; when the QoS parameter of the data is within the second preset range, the target network device is the second network device. Alternatively, when the QoS parameters of the data are within the first preset range, the target network device is a second network device; when the QoS parameters of the data are within the second preset range, the target network device is the first network device.

As another example, when the policy includes a preset value or a preset range, the terminal determines the target network device according to the policy, including: the terminal determines the target RAT of the data according to the QoS parameters of the data; and determines the RAT as the network device of the target RAT Is the target network device. Or, the terminal determines the target network device according to the QoS parameters of the data. Wherein, when the QoS parameter of the data is the preset value or is within the preset range, the target RAT is the RAT of the first network device; or the target network device is the first network device. When the QoS parameter of the data is not the preset value or is not within the preset range, the target RAT is the RAT of the second network device; or the target network device is the second network device. Vice versa, when the QoS parameter of the data is the preset value or is within the preset range, the target RAT is the RAT of the second network device; or the target network device is the second network device. When the QoS parameter of the data is not the preset value or is not within the preset range, the target RAT is the RAT of the first network device; or the target network device is the first network device.

Optionally, the above policy may be generated after interaction between the first network device and the second network device, and further configured to the terminal. For example, the first network device sends a service type or QoS parameter to the second network device for requesting a V2X service type or QoS supported by the second network device. The service type or QoS parameter sent by the first network device to the second network device may be one (or one) or multiple (or multiple), and the second network device may accept all or only a part of it. The second network device notifies the first network device of the accepted service type or QoS parameter, and the first network device generates a policy according to the service type or QoS parameter accepted by the second network device. For example, determining the second network device as the service type of the target network device, the threshold value of the QoS parameter, or the preset value or preset range of the QoS parameter is generated according to the service type or QoS parameter received by the second network device.

Optionally, the above policy may be activated when a predetermined condition is met, and if the predetermined condition is not satisfied, the service is rolled back to the first network device. For example, the first network device configures a CBR threshold value for the terminal, and the CBR threshold value may include a first CBR threshold value of a cell of the first network device and a second CBR threshold value of a cell of the second network device. When the CBR result measured by the terminal meets the threshold, for example, the CBR of the cell of the first network device is greater than or equal to the first CBR threshold, and the CBR of the cell of the second network device is less than or equal to the second CBR threshold , Enable the above strategy, otherwise, return the service to the first network device.

The above QoS parameters are, for example, PPPP, PPPR, QFI, 5QI, or a priority level.

In another implementation, the first network device decides the target network device and notifies the terminal. At this time, the above method further includes: the terminal receives instruction information from the first network device, the instruction information is used to indicate the target network device; the terminal determines the target The network device includes: determining a target network device according to the instruction information.

Optionally, the indication information is V2X resource information allocated for the target network device.

In addition, a V2X communication device is provided, which includes units or means for performing each step performed by the terminal in any one of the implementations of the third aspect above.

In addition, a V2X communication device is provided, which includes a processor and a memory. The memory is used to store the program, and the processor calls the program in the memory to execute the method executed by the terminal in any one of the implementations of the third aspect above.

In addition, a V2X communication device is provided, which includes a processor and an interface circuit, where the interface circuit is configured to communicate with other devices, and the processor is configured to execute the method executed by the terminal in any one of the foregoing third aspects.

In addition, a V2X communication device is also provided, which is connected to the memory and is used to read and execute the program stored in the memory, and is used to implement the method executed by the terminal in any one of the implementations of the third aspect above.

In addition, a program is provided for implementing a method for terminal execution in any one of the above implementations when executed by a processor.

Correspondingly, a V2X communication method is also provided for a communication system in which a first network device and a second network device jointly provide a terminal with a V2X service. The method includes: the first network device generates policy or instruction information, and the first network The device sends the policy or instruction information to the terminal, where the policy is used to determine the target network device, and the instruction information is used to indicate the target network device.

The description of policies and instructions is the same as described above.

The above method for determining the target network device can be understood as a semi-static method. The following describes a method for dynamically determining the target network device. In this mode, the first network device selects the target network device for resource scheduling at the request of the terminal for V2X resource authorization. The method includes: a first network device receives a first request from a terminal, the first request is used to request V2X resource authorization; the first network device determines a target network device, wherein the target network device is a network device that provides V2X resource authorization, and is The first network device or the second network device, or the first network device and the second network device. When the target network device includes a first network device, the first network device sends a V2X resource authorization to the terminal. When the target network device includes a second network device, the first network device sends a second request to the second network device to request the second network device to perform V2X resource authorization for the terminal.

Optionally, the first network device sends instruction information to the terminal, where the instruction information is used to indicate the target network device. When the target network device includes a second network device, the second network device may send the V2X resource authorization to the terminal through the first network device, or may directly send the V2X resource authorization to the terminal.

Optionally, the indication information includes a V2X resource authorization generated by the second network device.

In addition, a V2X communication device is provided, which includes units or means for performing each step performed by the first network device in any one of the implementations of the third aspect above.

In addition, a V2X communication device is provided, which includes a processor and a memory. The memory is used to store the program, and the processor calls the program in the memory to execute the method performed by the first network device in any one of the implementations of the third aspect above. .

In addition, a V2X communication device is provided, which includes a processor and an interface circuit, where the interface circuit is configured to communicate with other devices, and the processor is configured to execute the first network device in any of the implementations of the third aspect above. method.

In addition, a V2X communication device is also provided, which is connected to the memory and is used to read and execute the program stored in the memory, and is used to implement the method executed by the first network device in any one of the implementations of the third aspect above.

In addition, a program is provided for implementing the method executed by the first network device in any one of the implementations of the third aspect above when the program is executed by the processor.

According to a fourth aspect, a V2X communication method is provided, which is executed by a first network device. The method includes: a first network device receives instruction information from a core network device, the instruction information is used to indicate a bearer for a V3 interface; and the first network device determines a bearer for a V3 interface according to the instruction information, and determines The bearer is established to the first network device or the second network device.

When it is determined that the bearer is to be established to the second network device, the first network device sends a request message to the second network device, where the request message is used to request that the bearer for the V3 interface be established to the second network device.

Correspondingly, a V2X communication method is provided, which is executed by a second network device. The method includes: the second network device receives a request message from the first network device, the request message is used to request the establishment of a bearer for the V3 interface to the first Two network devices; the second network device establishes a bearer for the V3 interface according to the request message, and uses the bearer to communicate with the terminal.

Optionally, the above indication information is carried in a bearer establishment request message, that is, the first network device receives a bearer establishment request message from a core network device, and the bearer establishment request message includes the indication information. The indication information is used to indicate a bearer used for a V3 interface or a bearer used for a V2X.

Further, the second network device may also send a response message of the request message to the first network device.

Optionally, the response message carries a bearer identifier for identifying a bearer established for the V3 interface by the second network device.

Optionally, the above request message carries a bearer identifier requested by the first network device to establish by the second network device, and the second network device carries an indication cell in the response message, where the indication cell is used to instruct the first network device to request establishment The bearer establishment succeeds or fails. Or the second network device carries a bearer identifier in the response message, which is used to identify the bearer established for the V3 interface by the second network device.

Optionally, the response message may carry the configuration information of the bearer for the V3 interface. At this time, the first network device may also send the configuration information to the terminal. For example, the RRC connection reconfiguration message may be sent to the terminal.

In addition, a V2X communication device is also provided, and when it is used for the first network device, it includes units or means for performing each step performed by the first network device in any one of the implementations of the fourth aspect above; When it is used for the second network device, it includes units or means for performing each step performed by the second network device in any one of the implementations of the fourth aspect above.

In addition, a V2X communication device is provided, which includes a processor and a memory. The memory is used to store the program, and the processor calls the program in the memory. When it is used in the first network device, it is used to execute any of the fourth aspects above. A method performed by a first network device in an implementation; when used in a second network device, for performing a method performed by a second network device in any one of the implementations of the fourth aspect above.

In addition, a V2X communication device is provided, which includes a processor and an interface circuit. The interface circuit is used to communicate with other devices. When it is used in a first network device, the processor is configured to perform any of the foregoing fourth aspects. A method implemented by a first network device in implementation; when it is used in a second network device, the processor is configured to execute the method performed by the second network device in any one of the implementations of the fourth aspect above.

In addition, a V2X communication device is provided, which is connected to the memory and is used to read and execute the program stored in the memory. When it is used in the first network device, it is used to implement any one of the implementations of the fourth aspect above. The method executed by the first network device; when used in the second network device, used to implement the method executed by the second network device in any one of the implementations of the fourth aspect above.

In addition, a program is provided for implementing the method executed by the first network device in any one of the implementations of the fourth aspect when executed by a processor, or used to implement any one of the fourth aspects above. The method executed by the second network device in the implementation.

In the above solution, the core network indicates the bearer corresponding to the V3 interface to the network device, so that the network device can establish the bearer to a suitable device as needed. For example, for a terminal that only supports NR V2X but does not support LTE V2X, the bearer can be established. To NR network equipment, this can make the terminal's V2X communication quality better guaranteed.

The solutions in the above aspects can be combined with each other, thereby further improving the quality of terminal V2X communication.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a V2X scenario provided by an embodiment of the present application;

2 is a schematic diagram of a V2X communication scenario under a PC5 interface communication mechanism according to an embodiment of the present application;

3 is a schematic diagram of a V2X communication scenario under a Uu interface communication mechanism according to an embodiment of the present application;

4 is a schematic diagram of a V2X communication method according to an embodiment of the present application;

5 is a schematic diagram of a DC scenario provided by an embodiment of the present application;

FIG. 6 (a) is a schematic diagram of an LTE-NR dual connection scenario according to an embodiment of the present application; FIG.

FIG. 6 (b) is a schematic diagram of another LTE-NR dual connection scenario according to an embodiment of the present application; FIG.

FIG. 6 (c) is a schematic diagram of another LTE-NR dual connection scenario according to an embodiment of the present application; FIG.

7 is a schematic diagram of a V2X communication method according to an embodiment of the present application;

8 is a schematic diagram of another V2X communication method according to an embodiment of the present application;

9 is a schematic diagram of another V2X communication method according to an embodiment of the present application;

10 is a schematic diagram of still another V2X communication method according to an embodiment of the present application;

11 is a schematic diagram of still another V2X communication method according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a network architecture according to an embodiment of the present application; FIG.

13 is a schematic diagram of a V2X communication method according to an embodiment of the present application;

14 is a schematic diagram of another network architecture according to an embodiment of the present application;

15 is a schematic diagram of a V2X communication device according to an embodiment of the present application;

16 is a schematic diagram of another V2X communication device according to an embodiment of the present application;

17 is a schematic diagram of still another V2X communication device according to an embodiment of the present application;

18 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of a terminal according to an embodiment of the present application.

detailed description

The following describes some terms in this application:

1) Terminal, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice / data connectivity to users , For example, handheld devices with wireless connectivity, in-vehicle devices, etc. At present, some examples of terminals are: mobile phones, tablet computers, laptops, handheld computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, and augmented reality (augmented reality) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and the like.

2) The network device is a device in a wireless network, for example, a radio access network (RAN) node that connects a terminal to the wireless network. At present, some examples of RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), and node B (Node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home NodeB, or home NodeB, HNB), baseband unit , BBU), or wireless fidelity (WiFi) access point (AP). In a network structure, the network device may be a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

3) "Multiple" means two or more, and other quantifiers are similar. "And / or" describes the association relationship of related objects, and indicates that there can be three kinds of relationships, for example, A and / or B can mean: there are three cases where A exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the related objects are an "or" relationship.

Please refer to FIG. 1, which is a schematic diagram of a V2X scenario provided by an embodiment of the present application. As shown in Figure 1, V2X is a technology that enables vehicles to communicate with the outside world. X can represent vehicles, pedestrians, road facilities, or networks. That is, V2X can include vehicle-to-vehicle (V2V) communication, Vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication.

In V2V communication, the terminals for mutual communication can be located on two vehicles, which can be handheld devices or vehicle-mounted devices of users on the vehicle. In V2I communication, the terminals communicating with each other can be located on the vehicle and road facilities. For example, one terminal can be a handheld device or a vehicle-mounted device of the user on the vehicle, and the other terminal can be a roadside unit (RSU). It can be understood as a facility entity supporting V2X applications, and can perform information interaction with other terminals supporting V2X communication. In V2P communication, the terminals communicating with each other can be located on the vehicle and on the pedestrian. In V2N communication, the terminals communicating with each other can be located on the vehicle and the server. In short, the form of the terminal is not limited in this application, and the forms of the terminals communicating with each other may be the same or different.

Currently, V2X communication can be implemented through two communication mechanisms (also known as communication modes). One is a communication mechanism based on the PC5 interface, and the other is a communication mechanism based on the Uu interface. Please refer to FIG. 2 and FIG. 3, which respectively illustrate scenario scenarios under a communication mechanism of a PC5 interface and a Uu interface. The PC5 interface refers to an interface for direct communication between the terminal and the terminal. As shown in FIG. 2, the terminals communicate directly through the PC5 interface at this time. This communication system can also be called V2X sidelink (SL) communication system. At this time, the terminal can communicate with other terminals within the cell coverage area or outside the cell coverage area. The network device configures V2X resources for the terminal (or, in other words, the network device performs V2X resource authorization for the terminal); the terminal uses the resources (or authorization) configured by the network device to perform V2X SL communication through the PC5 interface. The Uu interface refers to a communication interface between a terminal and a network device. As shown in FIG. 3, the terminals communicate through the network at this time, that is, the network device forwards information from one terminal to other terminals. For example, the V2X data of the terminal (sending end) is sent to the RAN device through the Uu port, and the V2X data is further sent to the target terminal (receiving end) through the RAN device. At this time, the terminal uses the resources configured for the terminal by the network device to communicate with the network device within the coverage of the cell. In the V2I scenario, the RSU can be located on a network device, or it can communicate with the terminal through the network device independently of the network device. In the V2N scenario, the server can be located on the RAN side, the CN side, or the external network, and communicate with the terminal through the RAN and CN.

Currently, when a terminal accesses a cell, a network device configures V2X resources for the terminal. Since the carrier resources corresponding to the cell can also be used for non-V2X communication, the V2X resources configured by the network device for the terminal are usually only a part of the carrier resources corresponding to the cell. If you need to add more resources for V2X communication, it will affect the quality of non-V2X communication. However, the business needs for V2X communication are also increasing. Therefore, the embodiment of the present application provides a V2X communication method. The terminal configures V2X resources on more carrier resources, so that each carrier does not reduce its own resources for non-V2X communication. In the case of V2X communication, increase the resources for V2X communication, thereby improving the data throughput rate of V2X, at the same time, reduce the impact on the quality of non-V2X communication, thereby improving the user experience of V2X users, without affecting the existing wireless network non-V2X The user experience of the user.

Please refer to FIG. 4, which is a schematic diagram of a V2X communication method according to an embodiment of the present application. As shown in Figure 4, the method includes the following steps:

S410: The first network device sends a request message to the second network device, where the request message is used to request the second network device to configure a V2X resource for the terminal.

Correspondingly, the second network device receives a request message from the first network device, and learns, according to the request message, that the first network device requests the second network device to configure a V2X resource for the terminal. The second network device may determine whether to configure a V2X resource for the terminal according to its own situation. For example, it can be based on whether it supports V2X services, or can be based on whether the remaining situation of its own resources is suitable to provide V2X resources. When the second network device determines to configure a V2X resource for the terminal, it can perform the following operations:

S420: The second network device configures V2X resources for the terminal according to the request message;

S430: The second network device sends a response message to the first network device, where the response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate a V2X resource configured for the terminal.

When the second network device determines that the V2X resource is not configured for the terminal, it may also send a response message, which includes information indicating that the V2X resource configuration fails or is rejected. Alternatively, when the second network device determines that the terminal is not configured with V2X resources, it may not send a response message. The first network device may start a timer after sending a request message to the second network device, and do not receive it before the timer expires. When the response message is received, the default is that the second network device has not configured a V2X resource to the terminal.

When the second network device determines to configure a V2X resource for the terminal, the first network device receives a response message and notifies the terminal of the configured resource, that is, the first network device can perform the following operations:

S440: The first network device sends V2X resource configuration information to the terminal.

In this way, the terminal can receive the V2X resource configuration information, thereby obtaining V2X resources of more cells than the cell of the first network device, and using the V2X resources to initiate V2X services, thereby improving the V2X data throughput rate.

The V2X resources in this application may also be referred to as V2X sidelink resources or SL resources, which are resources used for communication between the terminal and the terminal through the PC5 interface.

The above request message may include V2X information of the terminal. After receiving the request message, the second network device may allocate V2X resources to the terminal according to the V2X information of the terminal, and then generate V2X resource configuration information. The V2X information of the further terminal may include at least one of the following information:

V2X request indication, the V2X request indication is used to instruct the second network device to allocate V2X resources (or V2X SL resources, or SL resources) to the terminal or to instruct the second network device to request a V2X resource configuration (or V2X SL resource configuration, Or SL resource configuration, or SL configuration). In other words, the V2X request instruction is used to notify the second network device that the terminal has a V2X service requirement, so that the second network device learns that the terminal has a V2X service requirement according to the V2X request instruction, thereby allocating V2X resources to the terminal. The name of the cell is not used to limit its scope. As long as the cell indicates or informs the second network device that the second network device is required to allocate V2X resources to the terminal, it can be used as the V2X request indication. The V2X request indication may be, for example, a 1-bit cell. When the value is "1" or "0", the second network device is instructed or notified that the second network device is required to allocate V2X resources to the terminal.

V2X authorization information. The V2X authorization information is used to indicate the type of terminal that the terminal is authorized to, such as whether the terminal is authorized as a vehicle terminal (or vehicle UE), or VUE for short; or whether the terminal is authorized as a handheld terminal (or pedalrian UE), referred to as PUE. The V2X authorization information is obtained by the first network device from the core network device. When the first network device and the second network device use two communication systems, or in other words, the radio access technology (RAT) of the first network device and the second network device are different. The first network device and the second network device (or different RAT technologies) can share the same V2X authorization information, or the first network device and the second network device (or different RAT technologies) use separate (that is, different ) V2X authorization information. When different RAT technologies use separate V2X authorization information, the first network device obtains different authorization information from the core network device, which are respectively used for different RAT technologies. Taking the LTE-NR joint networking as an example, it is assumed that the RAT technology of the first network device is LTE, and the RAT technology of the second network device is NR. Then LTE and NR can share the same authorization information, or LTE and NR can use separate authorization information. The first network device receives first authorization information and second authorization information from the core network, where the first authorization information is used for LTE and the second authorization information is used for NR. The first network device sends the authorization information for the NR to the second network device as the V2X authorization information in the above request message. After the second network device obtains the V2X authorization information, it can know the type of the terminal authorized, so as to configure a V2X resource for the terminal according to the type of the terminal authorized. The V2X resource configuration of different types of terminals can be different; they can be the same; or they can be partly the same, where the same part can be configured as a common and different parts can be configured as a dedicated.

V2X aggregation maximum bit rate (AMBR) (also known as SLAMBR or V2X SLAMBR) defines the maximum bit rate that the network needs to support when the terminal is performing V2X communication. The network device refers to this parameter when configuring resources for the terminal, so that the V2X data transmission of the terminal does not exceed this upper limit. For example, the modulation and coding strategy (modulation and coding scheme, MCS) configured by the network device for the terminal is relatively high, so the allocated V2X resources cannot be too much, otherwise it is easy to exceed the AMBR. The V2X AMBR is obtained by the first network device from the core network device. When the first network device and the second network device use two communication standards, or when the RATs of the first network device and the second network device are different. The first network device and the second network device (or different RAT technologies) may share the same V2X AMBR, or the first network device and the second network device (or different RAT technologies) use separate V2X AMBRs. When different RAT technologies use separate V2X AMBRs, the first network device obtains different AMBRs from the core network device and uses them for different RAT technologies. Taking the LTE-NR joint networking as an example, it is assumed that the RAT technology of the first network device is LTE, and the RAT technology of the second network device is NR. Then LTE and NR can share the same V2X AMBR, or LTE and NR can have separate V2X AMBR. The first network device receives a first AMBR and a second AMBR from a core network, where the first AMBR is used for LTE and the second AMBR is used for NR. The first network device sends the AMBR for NR to the second network device as the V2X AMBR in the above request message. After the second network device obtains the V2X AMBR, configure a V2X resource for the terminal according to the V2X AMBR.

The V2X capability information is reported by the terminal to the first network device. The terminal reports the first V2X capability information to the first network device. The first V2X capability information may include, for example, one or more of the following information: V2X band combination supported by the terminal, bandwidth class, and support for base station scheduling , Or support high power. Support for base station scheduling can be indicated by a cell. When the cell appears in the first V2X capability information, the terminal supports base station scheduling; when it does not, it does not. Or it can also indicate whether the terminal supports base station scheduling through different values of the cell. For example, when the value is "1", the terminal supports base station scheduling; otherwise, it does not support it. The instructions for supporting high power are similar and will not be repeated here. After receiving the first V2X capability information, the first network device may send part or all of the first V2X capability information to the V2X capability information in the request message when the second network device is required to configure V2X resources for the terminal. A second network device, and the second network device determines that a V2X resource is to be configured for the terminal according to the received V2X capability information.

V2X maximum transmission power (also called SL maximum transmission power or V2X SL maximum transmission power) is used to instruct the terminal to use the V2X resources configured by the second network device to perform the maximum transmission power allowed for V2X communication. When the first network device and the second network device use two communication standards, or when the RATs of the first network device and the second network device are different. The first network device and the second network device (or different RAT technologies) may use respective maximum transmission powers, that is, the first maximum transmission power and the second maximum transmission power. At this time, the maximum transmission power reported by the terminal includes The first maximum transmission power of the first network device (or the RAT of the first network device) and the second maximum transmission power for the second network device (or the RAT of the second network device). The first network device sends the second maximum transmission power as the above V2X maximum transmission power in the request message to the second network device. Alternatively, the first network device and the second network device (or different RAT technologies) may share the maximum transmission power. At this time, the first network device may perform power allocation on the maximum transmission power reported by the terminal, and divide the maximum transmission power ( It can be understood as the total power) is divided into two parts, and the part allocated to the second network device is notified to the second network device. At this time, the maximum transmission power of the V2X in the request message is the part allocated to the second network device. That is, the first network device receives the maximum transmission power from the terminal, and divides the maximum transmission power into the first maximum transmission power for the first network device (or the RAT of the first network device) and the first maximum transmission power for the second network device (or the second network device). The second maximum transmission power of the network device (RAT), and the first network device sends the second maximum transmission power as the above V2X maximum transmission power in the request message to the second network device. Taking the LTE-NR joint networking as an example, it is assumed that the RAT technology of the first network device is LTE, and the RAT technology of the second network device is NR. Then LTE and NR can share the maximum transmit power, or LTE and NR can have separate maximum transmit powers. The first network device receives a first maximum transmission power and a second maximum transmission power from the terminal, where the first maximum transmission power is used for LTE and the second maximum transmission power is used for NR. The first network device sends the maximum transmission power for NR to the second network device as the V2X maximum transmission power in the above request message. When the first network device and the second network device use the same communication standard, or the RATs of the first network device and the second network device are the same, the first network device and the second network device (or different RAT technologies) The maximum transmission power can be shared. At this time, the first network device can perform power allocation, divide the maximum transmission power (which can be understood as the total power) into two, and notify the second network device of the share allocated to the second network device. At this time, the maximum transmission power of the V2X in the request message is the share allocated to the second network device. Further, if the terminal capability supports, the power allocated to the second network device may also be equal to the total power.

The V2X service type information includes, for example, a V2X service type indication or a V2X quality of service (QoS) parameter, and is used to indicate a V2X service type or QoS requirement. When the request message sent by the first network device to the second network device includes the V2X service type information, the second network device may carry corresponding V2X service or data transmission accordingly. V2X service types can have multiple dimensions or methods, for example: 1. Internet Protocol (IP) or non-IP; 2. V2V, V2I, V2N or V2P; 3. Supplier service identifier (provider, service identifier), (PSID) or intelligent transportation system application identifier (ITS-AID). V2X QoS parameters can be, for example, single packet priority (PPPP) or single packet reliability (PPPR) or QoS flow identity (QFI) or 5G QoS indicator (5G QoS Identifier) , 5QI) or priority level, or any combination thereof.

Optionally, after the interaction between the first network device and the second network device is completed, the configuration message sent by the first network device to the terminal may include V2X service type information transferred to the second network device, such as a V2X service type Indication or V2X QoS parameters. That is, in the above step S430, the first network device may also send the V2X service type information transferred to the second network device to the terminal. The V2X service type information may be carried in the same configuration message as the V2X resource configuration information.

Optionally, the above request message may not include a V2X request indication, and when carrying other V2X information, such as V2X authorization information, V2X AMBR, V2X capability information, V2X maximum transmit power, or V2X service type information, the implicit indication of the first Two network devices allocate V2X resources to the terminal. Optionally, the above request message may only include a V2X request indication, and other V2X information may be obtained by the second network device from the core network device.

Optionally, in addition to the V2X request indication, the above request message may carry any of the above V2X information, and use the carried V2X information to implicitly instruct the second network device to allocate V2X resources to the terminal; or carry more than one V2X information, and use any of them Or the multiple V2X information implicitly instructs the second network device to allocate V2X resources to the terminal. For example, the above request message may also carry V2X capability information, which is used to implicitly instruct the second network device to allocate V2X resources to the terminal, and at the same time, used by the second network device to learn the V2X capability of the terminal.

Optionally, the above request message carries a V2X request indication, which explicitly instructs the second network device to allocate V2X resources to the terminal. And when the second network device is explicitly instructed to allocate V2X resources to the terminal, it may or may not carry other V2X information. For example, it carries V2X capability information. At this time, the V2X capability information is not used to instruct the second network device to allocate V2X resources to the terminal, but is used for the second network device to learn the V2X capability of the terminal and control the corresponding capability. As another example, the maximum transmission power of V2X is carried. At this time, the maximum transmission power of V2X is not used to instruct the second network device to allocate V2X resources to the terminal, but to own the second network device for power control. Other information is similar and will not be repeated here.

It can be seen that the request message may only include V2X request indication, V2X authorization information, V2X AMBR, V2X capability information, V2X maximum transmission power, or V2X service type information; or may include any combination of these information.

The above V2X resource configuration information may also be referred to as SL resource configuration information, or V2X SL resource configuration information, or V2X / SL configuration information, or V2X SL configuration information. The information may include: SL wireless network temporary identifier (SL-RNTI) and V2X resources.

V2X resources may include a sending resource pool and / or a receiving resource pool, where the sending resource pool may include a sending resource pool for scheduling and / or a sending resource pool for competition. The sending resource pool may include a common sending resource pool and / or a dedicated sending resource pool, and the receiving resource pool may include a common receiving resource pool and / or a dedicated receiving resource pool.

V2X resource configuration information may also include one or more of the following information: V2X synchronization configuration, synchronization reference type configuration, zone configuration information, V2X inter-frequency information, scheduling resource pool, SL sending priority configuration parameters, SL Priority, MCS, and transmit power.

V2X's synchronization configuration is optional and can include parameters for synchronous transmission, the length of a cyclic prefix (CP) for synchronization, the synchronization transmission period, and the synchronization window. If the first network device and the second network device use the same configuration, the second network device is not required to generate the configuration. The configuration of the synchronization reference type is optional. It can also be called SL-TypeTxSync, which is used to configure the synchronization source. The synchronization source can include a global navigation satellite system (GNSS) or a base station or terminal. If the first network device and the second network device use the same configuration, the second network device is not required to generate the configuration. It can be seen that the first network device and the second network device can use the same configuration for synchronization.

When the first network device and the second network device have different communication standards, that is, different RAT technologies are used, they can have their own synchronization sources. At this time, the terminal maintains two sets of synchronization mechanisms. Alternatively, the first network device and the second network device can use the same set of synchronization sources. For example, the first network device and the second network device are LTE and NR communication systems, respectively. The DC is initiated to support NR and V2X. At this time, you can use LTE V2X and NR V2X use the same set of synchronization sources to simplify terminal implementation.

When the second network device supports zone configuration, the V2X resource configuration information may include zone configuration information, and the zone configuration information may include a zone identifier and a V2X resource pool corresponding to the zone. That is, the V2X resources can be configured according to the region. At this time, the V2X resource configuration information can also include the region identifier.

The V2X inter-frequency information is optional, and includes inter-frequency V2X configuration information supported by the cell of the second network device. The SL sending priority configuration parameter is optional. Similar to the synchronization related configuration, the configuration of the first network device can be reused. Both MCS and transmit power are optional and can use the default configuration.

The above method can be used in scenarios where more than one (i.e., multiple) carrier or cell radio resources provide services to the terminal, such as a carrier aggregation (CA) scenario, and a dual connectivity (DC) scenario . The multiple carriers and cells may be located under different physical entities, that is, controlled by different physical entities, for example, under different RAN nodes. The DC scenario is used as an example for description below. The above communication flow is similar in other scenarios and will not be repeated here.

Please refer to FIG. 5, which is a schematic diagram of a DC scenario provided by an embodiment of the present application. At this time, the above first network device and the second network device are respectively a primary node (Master Node, MN) and a secondary node (SN), or a primary base station and a secondary base station. As shown in FIG. 5, the RAN node 510 and the RAN node 520 collectively provide services for the terminal 530, where the RAN node 510 is a MN and the RAN node 520 is an SN.

Dual connectivity can be implemented between RAN nodes of the same system or between RAN nodes of different systems. For example, dual connectivity can be implemented in the scenario of LTE (also known as 4G) and New Radio (NR) (also known as 5G) joint networking, which is called LTE-NR dual connectivity, so that the terminal can simultaneously switch from LTE Obtain wireless resources for data transmission with the NR air interface, and gain the transmission rate. The LTE-NR dual connection can use the LTE RAN node as the anchor point, that is, the master node, or the NR RAN node as the anchor point, and the master node can access the LTE core network or the NR core network. The following describes several types of networking in conjunction with Figures 6 (a), 6 (b), and 6 (c). The interface between the core network and the RAN node is represented by S1, and the interface between the RAN nodes is represented by X2 ( It may also be referred to as an Xn interface), and this representation is merely an example, and is not intended to limit the present application.

Please refer to FIG. 6 (a), which is a schematic diagram of an LTE-NR dual connection scenario according to an embodiment of the present application. As shown in Figure 6 (a), the LTE eNB, as the MN, and the evolved packet core (EPC) of the LTE system can establish a control plane and user plane connection for the terminal; the NR gNB, as the SN, and the EPC User plane connections can be established between them. It can be seen that in the scenario shown in FIG. 6 (a), the LTE eNB is used as the anchor point, and the LTE eNB accesses the LTE core network. Please refer to FIG. 6 (b), which is a schematic diagram of another LTE-NR dual connection scenario provided by an embodiment of the present application. The difference from Figure 6 (a) is that the core network that uses the NR gNB as the anchor and the NR gNB accesses the NR can be called the Next Genaeration Core (NGC) or the 5G core network (5 ^th Generation Core Network, 5G-CN). That is, the NR gNB as the MN can establish a control plane and user plane connection with the terminal for the terminal; the LTE eNB as the SN can establish the user plane connection with the NGC. Please refer to FIG. 6 (c), which is a schematic diagram of another LTE-NR dual connection scenario provided by an embodiment of the present application. It uses the LTE eNB as an anchor point as in FIG. 6 (a), the difference is that the LTE eNB accesses the core network NGC of the NR. That is, the LTE eNB, as the MN, and the NGC can establish a control plane and user plane connection for the terminal; the NR gNB, as the SN, can establish the user plane connection with the NGC.

In this DC scenario, the above V2X resource configuration process can be completed during the initial configuration of dual connectivity. At this time, the above request message may add a request message for the SN, and the above response message may add a request confirmation message for the SN. The following is described with reference to the drawings.

Please refer to FIG. 7, which is a schematic diagram of a V2X communication method according to an embodiment of the present application. As shown in Figure 7, the method includes the following steps:

S710: The RAN node 510 sends an SN addition request (SN add request) message to the RAN node 520, and the SN add request message is used to request to add the RAN node 520 as an SN.

In addition to requesting that the RAN node 520 be an SN, the SN addition request message is also used to request the RAN node 520 to configure a V2X resource for the terminal. For example, the SN addition request message includes V2X information of the terminal, and is used to request the RAN node 520 to configure V2X resources for the terminal. The description of the V2X information of the terminal is the same as the foregoing embodiment, and is not repeated here.

Optionally, the MN may request the SN to initiate the above process when the terminal updates the V2X resource configuration. For example, when the terminal updates the frequency information of interest, the MN can inform the SN of the updated frequency information and let the SN change the configuration, that is, the SN reconfigures the V2X resources for the terminal. For another example, when the MN decides to change the V2X service or V2X QoS assigned to the SN, it informs the SN of the changed V2X service or V2X QoS and lets the SN change the configuration, that is, the SN reconfigures the V2X resources for the terminal.

After receiving the SN addition request message, the RAN node 520 learns that the RAN node 510 wants to add it as an SN, and then performs SCG configuration. In this embodiment, during the SCG configuration process, the RAN node 520 generates SCG configuration information, which can carry the above V2X resource configuration information, and sends the generated V2X resource configuration information to the RAN node 510. That is, the RAN node 520 performs the following steps:

S720: The RAN node 520 carries the generated V2X resource configuration information in an SN addition request confirmation (SN addition request acknowledgement) message and sends it to the RAN node 510. The SN addition request confirmation message is a response message to the SN addition request message.

The description of the V2X resource configuration information is the same as the above embodiment, and is not repeated here.

In addition, the V2X resource configuration information can be carried as a container and sent to the RAN node 510 in the SN addition request confirmation message. For example, the V2X resource configuration information may be a radio resource control (RRC) message of the RAN node 520, for example, an RRC protocol data unit (PDU) or a part of the RRC PDU is sent to the RAN node 510.

The RAN node 510 receives the SN addition request confirmation message sent by the RAN node 520 and performs the following operations:

S730: The RAN node 510 carries the V2X resource configuration information of the RAN node 520 in an RRC connection reconfiguration message, and sends it to the terminal.

Exemplarily, if the RAN node 510 is a RAN node in LTE and the RAN node 520 is a RAN node in NR, the RAN node 510 sends an LTE RRC connection reconfiguration message to the terminal. The LTE RRC connection reconfiguration message includes V2X resource configuration information of the RAN node 520. Optionally, the V2X resource configuration information of the RAN node 520 may be an LTE RRC message or a part of the LTE RRC message; or the V2X resource configuration information of the RAN node 520 may be an RRC message of the RAN node 520 or the RAN node 520 Part of the RRC message. For example, the RRC reconfiguration message of LTE includes the RRC PDU of the RAN node 520, and the RRC PDU of the RAN node 520 is used as a container. The RAN node 510 may forward the RRC PDU of the RAN node 520 to the terminal without parsing the container. The V2X resource configuration information of the RAN node 520 is all or part of the RRC PDU of the RAN node 520. When the V2X resource configuration information of the RAN node 520 is a part of the RRC PDU of the RAN node 520, the RAN node 510 may change the complete The RRC PDU of the RAN node 520 is forwarded to the terminal.

After receiving the RRC connection reconfiguration message, the terminal parses out the V2X resource configuration information of the RAN node 520 and performs the following operations:

S740: The terminal sends an RRC connection reconfiguration complete (RRC connection reconfiguration complete) message to the RAN node 510.

The RAN node 510 receives the RRC connection reconfiguration completion message, or the RRC connection reconfiguration is completed, and performs the following steps:

S750: The RAN node 510 sends an SN reconfiguration complete (SN reconfiguration complete) message to the RAN node 520 to inform the RAN node 520 that the reconfiguration is complete.

In this way, the SN is added, and the SN is configured with V2X resources for the terminal. The terminal can obtain the V2X resources of the SN for V2X service transmission. After that, the terminal can synchronize with the SN.

In the existing DC technology, the configuration of triggering the DC is allowed only when the bearer is to be offloaded to the SN. In this application, for V2X services, since the bearer does not necessarily need to be generated, this principle may not apply, that is, to support V2X services, the SN addition request process may be specifically triggered. Alternatively, a new process can be introduced, similar to the SN adding request process. At this time, the above request message is a new request message, for example, it can be called a V2X / sidelink request message, etc. In this way, it can be backward compatible without affecting the existing DC mechanism.

It can be seen that the method shown in FIG. 4 can be completed during the initial configuration of the DC. The V2X resource information configured by the SN can be sent to the MN through an add request confirmation message, and sent to the terminal through the RC RRC connection reconfiguration message. Furthermore, the terminal can use the V2X resources configured by the SN to perform V2X communication, and obtain V2X resources of more cells besides the MN's cell, thereby improving the V2X data throughput rate. In this way, while the initial configuration of the DC is completed, V2X resources on the SN are obtained, signaling is saved, and communication efficiency is improved.

The embodiment shown in FIG. 7 performs the configuration of V2X resources on the SN during the initial configuration process of the DC. In addition, the configuration of V2X resources on the SN may be performed during other configuration processes, such as the SN modification process. The following is described with reference to FIG. 8.

Please refer to FIG. 8, which is a schematic diagram of another V2X communication method according to an embodiment of the present application. As shown in Figure 8, it includes the following steps:

S810: The MN sends an SN modification request (SN modification request) message to the SN. In the prior art, the SN modification request message is used to request to modify the configuration of the SN, such as requesting to establish certain bearers on the SN or requesting to modify the SCG Bearer, the SCG part of the split bearer, or request the addition or release of an SCG cell. In this embodiment, the SN may be requested to update the V2X resource configuration for the terminal. For example, when the terminal updates the frequency information of interest, the MN may inform the SN of the updated frequency information and let the SN change the configuration, that is, the SN is reconfigured for the terminal. V2X resources. For another example, when the MN decides to change the V2X service or V2X QoS assigned to the SN, it informs the SN of the changed V2X service or V2X QoS and lets the SN change the configuration, that is, the SN reconfigures the V2X resources for the terminal.

The SN modification request message may be used to request the RAN node 520 to configure a V2X resource for the terminal. For example, the SN modification request message includes V2X information of the terminal, and is used to request the RAN node 520 to configure V2X resources for the terminal. The description of the V2X information of the terminal is the same as the foregoing embodiment, and is not repeated here.

After receiving the SN modification request message, the SN parses out the V2X information of the terminal, configures V2X resources for the terminal according to the V2X information of the terminal, generates V2X resource configuration information, and sends the generated V2X resource configuration information to the MN. That is, the SN performs the following steps:

S820: The SN carries the generated V2X resource configuration information to an SN modification request confirmation (SN modification request message) and sends it to the MN. The SN modification request confirmation message is a response message to the SN modification request message.

The form or content of the V2X resource configuration information about the SN is the same as the above embodiment, and is not repeated here.

The MN receives the modification request confirmation message sent by the SN, and executes:

Step S830: The MN carries the V2X resource configuration information of the SN in an RRC connection reconfiguration message and sends it to the terminal.

This is similar to step S730 in FIG. 7 and will not be described in detail here.

After receiving the RRC connection reconfiguration message, the terminal parses the V2X resource configuration information of the SN from it and performs the following operations:

S840: The terminal sends an RRC connection reconfiguration complete (RRC connection reconfiguration complete) message to the MN.

This is similar to step S770 in FIG. 7 and will not be described in detail here.

The MN receives the RRC connection reconfiguration complete message and performs the following steps:

S850: The MN sends an SN modification confirmation (SN modification confirmation) message to the SN.

The above SN modification is triggered by the MN. Optionally, the SN modification can be triggered by the SN. At this time, compared to the above embodiment, before step S810, the method may further include step S801: the SN sends an SN modification request message to the MN.

It can be seen that the method shown in FIG. 4 can be implemented in the dual connection process. For example, it is implemented during the SN modification process, and the V2X resource configuration information of the SN is sent to the MN through the SN modification request confirmation message, and then re-connected through the MN RRC connection. Configuration messages are sent to the terminal. Furthermore, the terminal can use the V2X resources configured by the SN to perform V2X communication, and obtain V2X resources of more cells besides the MN's cell, thereby improving the V2X data throughput rate.

In the LTE-NR joint networking scenario, by transmitting V2X information and V2X resource configuration information between RAN nodes, the terminal can obtain the NR V2X service under the DC architecture, that is, on the air interface, the terminal can be configured with LTE at the same time. V2X and NR V2X improve the data throughput of V2X.

Optionally, the first network device can interact with other network devices to support V2X, so when selecting the second network device, the first network device can select a network device capable of supporting the V2X function as the second network device. Therefore, when the terminal has a demand for V2X services, the possibility that the second network device selected by the first network device for the terminal cannot provide corresponding services is reduced. In the DC scenario, when the MN chooses to add an SN, the service conditions of the terminal can also be considered, so that the SN that is more suitable for the terminal can be selected. For example, if the terminal has V2X service requirements, it can choose a network device that supports V2X as the SN.

Please continue to refer to FIG. 4. At this time, the above method may further include the following steps:

S401: The first network device receives V2X support information from the second network device, and the V2X support information is used to indicate whether the second network device supports V2X services, such as whether the V2X services are supported.

When the first network device determines that the second network device supports the V2X service according to the V2X support information, the above step S410 is performed, that is, the request message is sent to the second network device.

The first network device may also send its own V2X support information to other network devices, such as a second network device. The V2X support information is used to indicate the support status of the first network device for the V2X service, such as whether the V2X service is supported.

The above V2X support information may include V2X capability information, V2X service type, V2X quality of service (QoS) parameters, or frequency of providing V2X services. The V2X capability information is used to indicate whether the second network device supports V2X services. For example, it can be a 1-bit cell. When the value is "0", V2X services are not supported. When the value is "1", V2X services are supported. A value of "1" indicates that V2X services are not supported, and a value of "0" indicates that V2X services are supported. The V2X service type is used to indicate the V2X service type supported by the second network device, such as a V2X service, a V2I service, a V2P service, or a V2V service. The V2X QoS parameter is used to indicate the V2X QoS supported by the second network device, such as PPPP, PPPR, QFI, 5QI, or priority level, which represents the capability supported by the network device, or the V2X service that the network device can support. The frequency of providing the V2X service is used to indicate the frequency for the V2X service supported by the second network device.

The above V2X support information may be transmitted during the process of establishing an interface between the first network device and the second network device. Of course, it can also be transmitted during the interaction process of other network devices, or a new process can be used to interact with the V2X support information, which is not limited in this embodiment of the present application.

Take the first network device as an LTE RAN node and the second network device as an NR RAN node as an example. When an interface is established between the LTE RAN node and the NR RAN node, the LTE RAN node and the NR RAN node exchange V2X support information. When the LTE RAN node has V2X service requirements at the terminal, you can confirm whether the NR RAN node supports NR V2X service before selecting the SN. When it is supported, the LTE RAN node selects the NR RAN node as the SN and establishes a DC. When there is a demand for NR V2X services, the LTE RAN node can provide corresponding services for the NR RAN node selected by the terminal.

The network devices may not exchange V2X support information. When the terminal has a V2X service requirement, the first network device sends a request message to the second network device, and the second network device decides whether to increase the V2X resource configuration according to its support situation. And feedback to the first network device through a response message.

In each embodiment of the present application, V2X in each information or message may be replaced with SL or V2X SL. For example, V2X capability information can also be called SL capability information or V2X SL capability information; V2X service types can also be referred to as SL service types or V2X SL service types; V2X QoS parameters can also be referred to as SL QoS parameters or V2X SL QoS parameters; The frequency of providing V2X services can also be referred to as the frequency of providing SL services or the frequency of providing V2X SL services.

Optionally, the first network device can inform the terminal of its ability to support the configuration of more cell V2X resources for the terminal. This can help the terminal to consider the impact of V2X when selecting a cell to camp on, and it can give priority to supporting V2X services. Select a cell with this function to camp on. At this time, please continue to refer to FIG. 4. The above method further includes:

S402: The first network device sends notification information to the terminal, where the notification information is used to indicate the ability of the first network device to support the configuration of V2X resources of more cells for the terminal.

When the RATs of the first network device and the second network device are different, the notification information is used to indicate the ability of the first network device to support the configuration of a V2X resource of a different-standard cell for the terminal, that is, the first network device is instructed to support the configuration of a different network for the terminal. Standard V2X service capabilities. In the scenario of LTE-NR joint networking, for example, the notification information may be used to indicate that the first network device supports the capability of providing NR V2X services to the terminal.

The notification information can be sent to the terminal through a broadcast message, or can be sent to the terminal through a message 2 or message 4 (MSG2 or MSG4) that changes from the idle state to the connected state, where MSG2 and MSG4 refer to the random access process, respectively. Random access response (RAR) and RRC connection establishment messages; or it can be sent to the terminal through the third state to the connected state message 2 or message 4 (MSG2 or MSG4), where MSG2 and MSG4 are Refers to random access response (RAR) and RRC connection recovery (RRC) messages in the random access process.

Optionally, the terminal can report to the network device whether the terminal supports V2X capability information. The capability information can further be the terminal's ability to support NR V2X. The capability information can be reported to the RAN side or the core network side. . The capability information may be, for example, a V2X service type. In this way, the network device can configure NR V2X measurement for the terminal or V2XDC for the terminal when it knows that the terminal supports NR V2X or supports DC for V2X.

In the prior art, when a network device selects a common service terminal in another cell, the network device may select based on the measurement of the other cell by the terminal. For example, when selecting the SN, the network device may select based on the terminal measurement. At present, the measurement of a cell by a terminal includes measurement based on a synchronization signal block (SSB) or measurement based on a channel state information reference signal (CSI-RS) or measurement based on a cell reference signal CRS . Whether it is SSB-based measurement or CSI-RS-based measurement, it is impossible to determine whether the terminal can obtain better V2X services in other cells. Based on this, the embodiment of the present application further provides a V2X communication method. The network device configures V2X measurement for the terminal to obtain the measurement result of the V2X service quality of the terminal to other cells, so as to select a suitable cell to provide the terminal with V2X service according to the measurement result , So that the selected cell can meet the terminal's service quality requirements for V2X services. This method can be combined with the methods provided in the above embodiments to further improve the V2X service quality of the terminal on the second network device, thereby improving the V2X data throughput rate.

The following description is made with reference to the accompanying drawings. Please refer to FIG. 9, which is a schematic diagram of another V2X communication method according to an embodiment of the present application. As shown in Figure 9, the method includes the following steps:

S910: The first network device sends V2X measurement configuration information to the terminal, and the V2X measurement configuration information is used to configure the terminal to measure V2X service quality of a cell of another network device. The V2X measurement configuration information includes a cell identifier of the second network device, V2X resource information of a cell of the second network device, and a V2X measurement event. For example, the second network device has a first cell, and the V2X measurement configuration information includes an identifier of the first cell, and the V2X resource information of the first cell. The V2X resource information may include, for example, V2X transmission resource pool information for identifying V2X transmission. Configuration of the resource pool.

The first network device generates the V2X measurement configuration information and sends the V2X measurement configuration information to the terminal. The terminal receives the V2X measurement configuration information and performs the following operations:

S920: The terminal measures the cell indicated by the cell identifier in the V2X measurement configuration information according to the V2X measurement configuration information, and obtains a measurement result.

During the measurement process, the terminal determines the cell to be measured according to the cell identifier, obtains the V2X resource location according to the V2X resource information, and measures the V2X resource. When the measurement result meets the requirements of the V2X measurement event, the terminal reports the measurement result, and the measurement result is, for example, a channel busy rate (CBR). Optionally, the measurement result may be carried in a measurement report and reported to the network device. The measurement report may further include a cell identity. Optionally, the measurement report may further include a measurement event identifier, which is used to inform the network device of which measurement event triggered measurement result is reported. Optionally, the measurement report may further include a V2X resource reporting identifier, and each reporting identifier may have a corresponding measurement result. The V2X resource reporting identifier is used to let the network device know which V2X resource pool the measurement result is. Correspondingly, in the V2X resource information delivered to the terminal by the network device, the V2X resource will correspond to a V2X resource reporting identifier.

S930: The first network device receives the measurement result, that is, the measurement result that the terminal performs measurement and reports according to the V2X measurement configuration information.

The first network device can configure the terminal with one or more V2X measurements of the neighboring cell, that is, the cell of the second network device can be one or more, and the V2X measurement configuration information can configure the V2X measurement of the cell with multiple network devices, that is, The V2X measurement configuration information may also include cell identifiers of other network devices, and V2X resource information of the corresponding cells. In this way, the terminal can perform V2X measurement on multiple cells and report the V2X measurement results, so that the first network device selects a cell that can provide the optimal V2X service according to the measurement results and configures V2X resources for the terminal.

This method is combined with the above embodiment. In the above embodiment, before the first network device sends a request message to the second network device, the first network device selects a suitable target cell according to the measurement result, and sends the target cell to the second cell where the target cell is located. The network device sends a request message. The target cell is a cell where the V2X service quality meets the requirements or a cell with the best V2X service quality, that is, a cell whose measurement results meet the requirements or whose measurement results are optimal. In this way, the terminal can obtain a V2X service whose service quality meets the requirements from the second network device. Optionally, instead of selecting the target cell, the first network device may select a suitable second network device, and bring the measurement result to the second network device in the request message, so that the second network device selects a suitable target cell. And sending the appropriate target cell to the terminal through the first network device.

The first network device may obtain information about a cell of the second network device, such as a cell identifier and V2X resource information of the cell, from a network management device, such as an operation, administration, and maintenance (OAM) system, and generate V2X accordingly. Measure configuration information.

The first network device may obtain cell information, such as a cell identity and V2X resource information of the cell, from the second network device, and generate V2X measurement configuration information accordingly. At this time, the above method may include the following steps:

S901: The second network device sends the cell information to the first network device, including a cell identifier and V2X resource information of the cell. That is, the first network device acquires the information of the cell from the second network device.

The first network device may obtain information of all its cells from the second network device, or may obtain information of some of its cells from the second network device. The first network device may also send information about all or part of its own cell to the second network device, that is, the network devices exchange information about their respective cells. The interaction of this information can be implemented during the establishment of the interface between the network devices, or during the configuration update process or the resource status update process. Among them, the configuration update is an existing process. When a network device configuration update occurs, the peer network device will be notified through this process. The resource status update process can be understood as a V2X resource status update process introduced by V2X to indicate the network device. V2X resource update.

Optionally, the above V2X measurement configuration information may further include a V2X resource reporting identifier. The V2X resource reporting identifier is used to identify the V2X resource, that is, the terminal carries the V2X resource reporting identifier when reporting the measurement result, and is used to identify the reported measurement result. Corresponding V2X resources. The V2X resource can also be called a V2X resource pool.

The above V2X measurement event may be, for example, that a channel busy rate (CBR) is greater than a threshold value, or that CBR is less than a threshold value, or that CBR is greater than or equal to a threshold value, or that CBR is less than or equal to a threshold value. details as follows:

1. In order to trigger the SN increase, the measurement event may include:

Event 1. The CBR of the neighboring cell V2X resources is less than the threshold or less than or equal to the first threshold; or,

Event 2. The CBR of the V2X resources of the serving cell of the first network device is greater than or equal to the second threshold, and the CBR of the V2X resources of the neighboring cell is less than or equal to the third threshold.

2. In order to trigger the SN change, the measurement event may include:

Event 3. The CBR of the V2X resources of the second network device serving cell is greater than or equal to the fourth threshold, and the CBR of the V2X resources of the neighboring cell is less than or equal to the fifth threshold.

To trigger SN release

Event 4. The CBR of the V2X resources of the second network device serving cell is greater than or equal to a sixth threshold.

The thresholds here are only used to summarize the preset CBR values, and do not indicate that these thresholds are the same, and may be different under different settings. In addition, the first to the sixth are only for the convenience of distinguishing the threshold values under different conditions, and do not indicate that there is an order relationship between the threshold values, or that the threshold values are different. In each measurement event, it can be called a threshold value without being limited by a specific serial number. CBR can also be called V2X CBR, or SL CBR, or V2X SL CBR.

In addition, the above measurement events can also be used for other purposes, such as the migration of V2X services, which can be carried with granularity of the bearer. For example, when the above measurement event 1 or 2 is satisfied, the V2X service may be migrated to the second network device, and the migrated V2X service may be a V2X service of a preset service type or a V2X service of a preset QoS. As another example, when the above measurement event 4 is satisfied, the V2X service may be migrated back to the first network device. As another example, when the above measurement event 3 is satisfied, the V2X service can be migrated to other cells.

It can be seen that the network device configures a measurement event for the terminal. The measurement event can be used for different purposes, and the threshold value can be different under different conditions.

Further, the serving cell and the neighboring cell may be cells of a different system or cells of the same system. For example, in the scenario of mixed LTE and NR networking, where the serving cell and neighboring cells are cells of different standards, the V2X resources can be resources of different standards. The above cell identification is not limited as long as it can identify the cell, and may be, for example, a physical cell identifier (PCI) or a global cell identifier (CGI).

The V2X resources of the above cells may be resource pools, and the specific form of the resource information is not limited as long as the location of the resources can be specified. For example, indicating a time domain position, or a frequency domain position, or a combination of the two. In the LTE communication system, it may be, for example, a physical resource block (PRB) or a subframe position. In the NR communication system, it may be, for example, a slot or a subframe or a frame or a PRB position.

Assuming that the cell meeting the measurement event requirements is the first cell, the above measurement report may include the identifier of the first cell, the V2X resource reporting identifier, and the measured CBR. The V2X resource reporting identifier is used to identify the V2X resource of the first cell, for example, at least one V2X resource pool.

Taking LTE-NR joint networking as an example, LTE network equipment can configure V2X measurement of NR cells. At this time, the LTE network device can configure NR measurement for the terminal. The NR V2X measurement configuration specifically includes: the identity of the NR cell, the V2X resource information of the NR cell, and the NR V2X measurement event. The terminal performs NR V2X measurement according to the NR V2X measurement configuration configured by the LTE network device, and reports the NR measurement result to the LTE network device when the NR V2X measurement event is satisfied. In this way, the configuration of NR V2X measurement by the LTE network device can be realized, so that the LTE network device can obtain the situation of the NR V2X link, and select a better NR secondary station for the V2X service of the terminal.

In the above embodiment, both the first network device and the second network device are configured with V2X resources for the terminal. among them,

When the V2X resources provided by the current network device to the terminal are insufficient to meet the service requirements of the terminal, or to meet the requirements of the throughput rate, more network devices may be triggered to configure V2X resources for the terminal. In addition, when a terminal has a certain V2X service requirement and the current network equipment of the V2X service cannot support it, it can trigger other network equipment that can support the service to configure V2X resources for the terminal. For example, the current network device is an LTE network device, which does not support the first service, but the NR supports the first service, so the LTE network device may request the NR network device to configure a V2X resource for the terminal.

After both the first network device and the second network device have configured V2X resources for the terminal, the terminal can obtain the V2X resources of the first network device and the V2X resources of the second network device. At this time, which network device configuration can be used for service transmission V2X resources are designed to improve the efficiency and throughput of V2X communications. For example, after the NR V2X configuration is completed, the terminal can obtain LTE V2X resources and NR V2X resources at the same time, and design which services are sent in LTE and which services are sent in NR, which can improve the matching between services and RATs, which is more conducive to communication quality. improve.

The following is described with reference to the drawings.

Please refer to FIG. 10, which is a schematic diagram of another V2X communication method according to an embodiment of the present application. As shown in FIG. 10, the method is used in a communication system in which a first network device and a second network device jointly provide a V2X service to a terminal. That is, it is used when the first network device and the second network device are configured with V2X resources for the terminal. The method includes:

S1010: The terminal determines a target network device, where the target network device is a first network device and / or a second network device;

S1020: The terminal uses the V2X resources configured by the target network device to perform V2X communication with other terminals.

The manner in which the first network device configures the V2X resource for the terminal may be the same as the existing manner, for example, configuring the V2X resource for the terminal through an RRC message. For the manner in which the second network device configures V2X resources for the terminal, refer to the foregoing embodiments.

Optionally, when the first network device is added with the second network device as the SN, and the bearer directly used for the RRC message transmission between the SN and the terminal has been established, the second network device may configure the terminal through the RRC message. V2X resources, that is, the V2X resource configuration information is directly sent to the terminal without the need of forwarding by the first network device.

In an optional implementation manner, the RATs of the first network device and the second network device are different. The service type or the corresponding relationship (or mapping relationship) between the QoS parameter and the RAT can be set in advance. When service data arrives, , The terminal selects the target network device according to the corresponding relationship.

At this time, the terminal presets the correspondence between the service type and the RAT or the correspondence between the QoS parameter and the RAT. When the data arrives, according to the service type or QoS parameter of the data, the target RAT corresponding to the service type or QoS parameter is determined, and The network device whose RAT is the target RAT is determined as the target network device. For example, when the RAT of the first network device is the target RAT, the first network device is the target network device, and when the RAT of the second network device is the target RAT, the second network device is the target network device.

Alternatively, the terminal presets a correspondence between a service type and a network device or a correspondence between a QoS parameter and a network device, where the RATs of the first network device and the second network device are different. When data arrives, the target network device corresponding to the service type or QoS parameter is determined according to the service type or QoS parameter of the data. For example, the first network device is an LTE network device, and the second network device is an NR network device. When the data service type or QoS parameter corresponds to the first network device, the first network device is the target network device. When the data service type or QoS is When the parameter corresponds to the second network device, the second network device is the target network device.

In another optional implementation manner, the network side issues a policy, so that the terminal decides which network device's V2X resources to use according to the policy issued by the network side. The policy can be generated by the network device and sent to the terminal, or it can be generated by the V2X functional entity of the core network and sent to the terminal through the network device, or it can be generated by the V2X application layer and sent to the terminal through the network device. The V2X application The tier can be understood as a V2X application server. This policy can be sent to the terminal through RRC messages or broadcasted to the terminal through system information, and the same policy can be broadcast for all terminals served or all terminals in the cell, or a terminal-specific policy can be sent for the terminal. The embodiment of the present application does not limit the sending manner of the policy.

Optionally, the policy is, for example, a correspondence between a service type and a RAT or a correspondence between a QoS parameter and a RAT. The terminal receives the policy from the network side and selects the target network device according to the policy. At this time, the manner of selecting the target network device according to the policy is the same as the above embodiment. That is, when the data arrives, the target RAT corresponding to the service type or QoS parameter is determined according to the service type of the data or the QoS parameter of the data, and the network device whose RAT is the target RAT is determined as the target network device. Alternatively, the policy is, for example, a correspondence between a service type and a network device or a QoS parameter with a network device. The RATs of the first network device and the second network device are different. For example, the first network device is an LTE network device and the second network The device is an NR network device. The terminal receives the policy from the network side and selects the target network device according to the policy. At this time, the manner of selecting the target network device according to the policy is the same as the above embodiment. That is, when data arrives, the target network device corresponding to the service type or QoS parameter is determined according to the service type of the data or the QoS parameter of the data.

The business type of the data is the business type to which the data belongs.

Optionally, the policy may be a threshold value of a QoS parameter. The way the terminal selects the target network device according to the policy can be flexibly designed. For example, when the QoS parameter of the data reaches or exceeds the threshold, the terminal determines the target RAT or the target network device, and when the QoS parameter of the data is greater than the threshold, the RAT of the target RAT or the target network device is The first network device; when the QoS parameter of the data is less than the threshold value, the target RAT is the RAT of the second network device or the target network device is the second network device; when the QoS parameter of the data is equal to the threshold value, the target RAT is the first The RAT of the one or second network device, or the target network device is the first network device or the second network device. For another example, when the QoS parameter of the data is greater than the threshold, the target RAT is the RAT of the second network device or the target network device is the second network device; when the QoS parameter of the data is less than the threshold, the target RAT is the first network The RAT or target network device of the device is the first network device; when the QoS parameter of the data is equal to the threshold value, the target RAT is the RAT of the first or second network device, or the target network device is the first network device or the second network device. The QoS parameter is, for example, PPPP, PPPR, QFI, 5QI, or a priority level.

Take the RAT of the first network device as LTE and the RAT of the second network device as an example. Assuming the QoS parameter is PPPP, when PPPP is greater than the threshold, the service is sent using LTE V2X resources; when PPPP is less than the threshold, the service is sent using NR V2X resources; when PPPP is equal to the threshold, the service is sent using LTE V2X resources or NR V2X resource transmission. Alternatively, when PPPP is greater than the threshold, the service is sent using NR V2X resources; when PPPP is less than the threshold, the service is sent using LTE V2X resources; when PPPP is equal to the threshold, the service is sent using LTE V2X resources or NR V2X resources . Other parameters are similar, such as PPPR.

Optionally, the policy includes, for example, a preset value or a preset range of the QoS parameter, and the terminal determines a target RAT or a target network device of the data according to the QoS parameter of the data. The preset value or preset range may be the same as the number of RATs. For example, two preset values or preset ranges may be set, that is, a first preset value (or a first preset range) and a second preset value (or a second preset range). When the QoS parameter of the data is the first preset value or is within the first preset range, the target RAT is the RAT of the first network device or the RAT of the second network device, or the target network device is the first network device or the second Network device; when the QoS parameter of the data is the second preset value or within the second preset range, the target RAT is the RAT of the second network device or the RAT of the first network device, or the target network device is the second network device Or the first network device. The preset value or preset range may be different from the number of RATs. For example, setting a preset value or preset range. When the QoS parameter of the data is the preset value or is within the preset range, the target RAT is the RAT of the first network device or the RAT of the second network device, or the target network device is the first network device or the second network device ; When the QoS parameter of the data is not the preset value or is not within the preset range, the target RAT is the RAT of the second network device or the RAT of the first network device, or the target network device is the second network device or the first network device.

Taking RAT including LTE and NR as examples, a preset value or a preset range can be used to indicate how much PPPP / PPPR services use LTE V2X resources or NR V2X resources. It is also possible to indicate the range of PPPP / PPPR services using LTE V2X resources or NR V2X resources through two preset values or preset ranges.

Optionally, the above policy may be generated after interaction between the first network device and the second network device, and further configured to the terminal. For example, the first network device sends a service type or QoS parameter to the second network device for requesting a V2X service type or QoS supported by the second network device. The service type or QoS parameter sent by the first network device to the second network device may be one (or one) or multiple (or multiple), and the second network device may accept all or only a part of it. The second network device notifies the first network device of the accepted service type or QoS parameter, and the first network device generates a policy according to the type of service or QoS parameter accepted by the second network device. For example, determining the second network device as the service type of the target network device, the threshold value of the QoS parameter, or the preset value or preset range of the QoS parameter is generated according to the service type or QoS parameter received by the second network device.

Optionally, the above policy may be activated when a predetermined condition is met, and if the predetermined condition is not satisfied, the service is rolled back to the first network device. For example, a network device (for example, a first network device) configures a CBR threshold value for a terminal, and the CBR threshold value may include a first CBR threshold value of a cell of a first network device and a second CBR of a cell of a second network device. Threshold. When the CBR result measured by the terminal meets the threshold, for example, the CBR of the cell of the first network device is greater than or equal to the first CBR threshold, and the CBR of the cell of the second network device is less than or equal to the second CBR threshold , Enable the above strategy, otherwise, return the service to the first network device.

When data arrives, the terminal can use any of the above methods to select the target network device, and then obtain V2X resources from the target network device to perform V2X communication with other terminals. The terminal can obtain V2X resources in multiple ways. One way is called mode 3 and one way is called mode 4. In mode 3, when the terminal has data to perform V2X communication with other terminals, it requests V2X resources from the target network device, for example, sends a scheduling request (SR) and / or a buffer status report (BSR). To request V2X resource authorization from the target network device. In mode 4, the resource pool configured by the network device for the terminal is divided according to the zone, and the terminal selects V2X resources in the resource pool configured by the target network device for V2X communication with other terminals according to its location.

The above method for determining the target network device can be understood as a semi-static method. The following describes a method for dynamically determining the target network device. In this mode, the first network device decides the target network device and notifies the terminal.

Please refer to FIG. 11, which is a schematic diagram of another V2X communication method according to an embodiment of the present application. As shown in FIG. 11, the method includes the following steps:

S1110: The terminal sends a first request to the first network device for requesting V2X resource authorization.

The V2X resource authorization can be a dynamic resource or a pre-configured resource, such as a pre-configured grant type 1 (configured grant type 1) or a pre-configured grant type 2 (configured grant type 2), which can also be referred to as semi-authorized Static scheduling (semi-persistent scheduling) (SPS) resources. Among them, in the pre-configured authorization type 1, the pre-configured uplink authorized resources are indicated through RRC signaling, for example, the location, size, and period of the authorized resources are indicated. In the pre-configured grant type 2, the period of the authorized resource is configured through RRC signaling, the position and size of the authorized resource are indicated by downlink control information (DCI), and the authorized resource is activated.

The first request may be an SR / BSR, or may be terminal assistance information (UE information) for requesting a pre-configured resource.

After receiving the first request, the first network device can decide in real time whether the corresponding data or service is transmitted using the V2X resource of the first network device or the V2X resource of the second network device is selected for transmission, or the V2X resource of the first network device is used at the same time And transmitting the V2X resources of the second network device, that is, determining whether the target network device is the first network device or the second network device, or the first network device and the second network device. At this time, the first network device performs the following operations:

S1120: The first network device determines a target network device, and the target network device is the first network device or the second network device, or the target network device is the first network device and the second network device.

For example, the first network device is an LTE network device and the second network device is an NR network device. After the first network device receives the first request, it can decide whether the data corresponding to the first request is transmitted in LTE V2X, NR V2X, or both LTE V2X and NR V2X. In other words, it is determined whether the V2X resource grant of the data corresponding to the first request is an LTE V2X resource grant or an NR V2X resource grant, or the LTE V2X resource grant and the NR V2X resource grant are used at the same time. When the first network device decides to adopt the V2X resource authorization of the first network device, that is, when the target network device includes the first network device, the first network device sends the V2X resource authorization to the terminal. When the first network device decides to use the V2X resource authorization of the second network device, that is, when the target network device includes the second network device, the following operations are performed:

S1130: The first network device sends a second request to the second network device, which is used to request the second network device to authorize V2X resources for the terminal, that is, to allocate V2X resources in real time.

The V2X resource authorization is different from the V2X resource configuration in the above embodiment. The V2X resource authorization is used in real time for the terminal to perform V2X data transmission, and the above V2X resource configuration is a static configuration. In use, the terminal can further request real-time resources from the network device during subsequent use, and can also select resources in real time according to the area in which it is located.

The first network device may directly send the first request of the terminal as the second request to the second network device, or may regenerate the second request and send the second request to the second network device according to the first request. The second network device may generate a V2X resource authorization for the terminal according to the second request, and send the V2X resource authorization to the first network device (step S1131). The V2X resource authorization is allocated in real time based on the second request. For example, if the first request is SSR or BSR in S1110, then the second network device allocates real-time scheduling resources, and in S1110 requests pre-configured resources, the second network device is based on the service in the terminal auxiliary information. Model to generate V2X pre-configured resource grants for the UE. Optionally, if the V2X resources configured for the terminal by using the method in the foregoing embodiment have been adopted, then the resources in the V2X resources configured above may be dynamically specified for V2X communication. Alternatively, the resource authorization process may be omitted, and the first network device directly performs step S1140.

S1140: The first network device sends instruction information to the terminal, where the instruction information is used to indicate a target network device. For example, when the first network device selects the second network device as the target network device, the indication information is a V2X resource authorization granted by the second network device to the terminal.

Taking the first network device as an LTE network device, the second network device as an NR network device, and the resource requested by the terminal as a pre-configured resource as an example, the above method includes:

In step S1110, the terminal sends a first request, that is, terminal auxiliary information, to the LTE network device to request a pre-configured resource.

In step S1120, the LTE network device decides that the data corresponding to the first request is transmitted by NR V2X, that is, NR V2X resources are used. In step S1130, the LTE network device requests the NR network device to perform V2X resource authorization for the terminal, for example, forwards traffic pattern information reported by the terminal to the NR network device, and requests the NR network device to generate a pre-configured V2X for the terminal Resource authorization. After the NR network device receives the second request from the LTE network device, it generates a pre-configured V2X resource authorization and sends it to the LTE network device. The LTE network device authorizes the pre-configured V2X resource authorization generated by the NR network device in step S1140. Send to the terminal. The service graphics correspond to services that appear periodically. By sending this information, the second network device can be requested to allocate pre-configured resources to save dynamic scheduling signaling.

When it is determined that the terminal's current service is transmitted on the V2X configured by the second network device (for example, the NR network device), that is, the V2X resource configured by the second network device is used for transmission, the terminal can directly communicate with the second Network device communication. At this time, signaling can be directly transmitted between the terminal and the second network device for transmitting V2X related information. For example, the terminal directly sends terminal auxiliary information, sidelink UE information, and the like to the second network device for a specific V2X service. If the terminal cannot directly transmit signaling to the second network device, the information transmitted between the terminal and the second network device is transferred to the second network device through the first network device, for example, through uplink information transfer (UL information transfer, multiple (RAT, DC, MRDC) message is delivered to the first network device, and the first network device forwards the message to the second network device through an RRC transfer message on the interface. The direct transmission signaling between the terminal and the second network device may also reuse SRB3 supported by the existing standard, and the SRB3 is a signaling radio bearer (SRB) for direct communication between the terminal and the secondary node.

That is, when the terminal determines that the target network device includes a second network device, the terminal may directly perform V2X service related signaling transmission with the second network device.

In the existing communication system, in order to support V2X services, a V2X control function entity is introduced on the core network side. The V2X control function entity can be located in the core network element, or it can be used as an independent network. Meta exists. Please refer to FIG. 12, which is a schematic diagram of a network architecture according to an embodiment of the present application.

As shown in FIG. 12, the interface between the V2X control function entity and the terminal is a V3 interface, and the communication between the V2X function entity and the terminal will pass through the RAN node, and is specifically implemented through the user plane of the RAN node.

Considering that there may be terminals that support only one RAT technology, such as terminals that only support NR V2X but not LTE, in order to implement a complete NR V2X system, the V3 interface must be established on the NR network equipment. At present, the V3 interface is carried on the user plane on the RAN side, that is, at this time, the signaling between the terminal and the V2X control function entity is carried through the data radio bearer (DRB), so it can be understood as the NR network equipment and There is a user plane interface between the core networks, so it is feasible to transfer the DRB from the LTE network equipment to the NR network equipment. Based on this, the embodiment of the present application provides another communication method, in which the core network indicates to the network device which DRB is the DRB corresponding to the V3 interface, so that the network device transfers the DRB to the required device as needed. Here, an LTE network device is used as an example for transferring a DRB corresponding to a V3 interface to an NR network device. Those skilled in the art can apply it to NR network devices to LTE network devices, or any other two RAT technologies. Transfer between network devices.

Please refer to FIG. 13, which is a schematic diagram of a V2X communication method according to an embodiment of the present application. As shown in Figure 13, the method includes the following steps:

S1310: The core network device sends instruction information to the first network device, where the instruction information is used to indicate a bearer used for the V3 interface.

The first network device receives the instruction information and performs the following operations:

S1320: The first network device determines a bearer for the V3 interface according to the instruction information, and determines to establish the bearer to the first network device or the second network device.

For example, when the terminal supports LTE V2X, the bearer can be established on the first network device supporting LTE V2X, and when the terminal supports only NR V2X, the bearer can be established on the second network device supporting NR V2X.

When it is determined to establish a bearer to the second network device, the first network device further performs the following operations:

S1330: Send a request message to the second network device, where the request message is used to request that the bearer for the V3 interface be established to the second network device.

The second network device receives the request message and performs the following operations:

S1340: The second network device establishes a bearer for the V3 interface according to the request message.

S1350: The second network device uses the bearer to communicate with the terminal, that is, the bearer is used for air interface (NR-Uu) communication between the NR access network and the terminal.

Optionally, the above method may further include:

S1360: The second network device sends a response message to the request message to the first network device.

Optionally, the above request message may carry a bearer identifier that the first network device requests the second network device to establish, and the second network device carries an indication cell in the response message, and the indication cell is used to instruct the first network device to request establishment The bearer establishment succeeded or failed. Or the second network device carries a bearer identifier in the response message, which is used to identify the bearer established for the V3 interface by the second network device.

Optionally, the second network device may carry the configuration information of the bearer for the V3 interface in the response message. After receiving the response message, the first network device may send the configuration information to the terminal (S1370), so that the terminal can perform the configuration according to the configuration information. To communicate with the second network device. Alternatively, the second network device may directly send the configuration information for the bearer of the V3 interface to the terminal, so that the terminal can communicate with the second network device according to the configuration information.

Optionally, during the bearer establishment process, the core network device may carry the indication information in a bearer establishment request message sent to the first network device. The indication information is used to indicate that the bearer to be established corresponds to V2X, that is, the bearer is used for a V3 interface. The bearer establishment request message may further include a bearer identification (ID) and corresponding QoS.

When the terminal does not support V2X communication of the RAT of the first network device and supports V2X communication of the RAT of the second network device, the first network device may establish the bearer for the V3 interface to the second network device.

The first network device may send a bearer identifier to the second network device during the interaction with the second network device, where the bearer identifier indicates that the bearer is a bearer corresponding to the V3 interface. For example, in the DC scenario, the SN can be added or modified (as shown in Figure 7 or Figure 8). The MN carries the bearer ID in the request message and sends it to the SN. The bearer ID is used to indicate that the bearer corresponds to the V3 interface. , The SN may establish a bearer for the V3 interface according to the bearer identifier. This bearer can be used for air interface (NR-Uu) communication between the NR access network and the terminal. Further, an X2 channel can be established between the NR access network and the LTE access network, that is, an evolved universal terrestrial radio access network (E-UTRAN), for V2X services or data transmission. And terminals can transmit V2X services or data through the NR PC5 interface. In this embodiment, the core network uses the LTE core network as an example, including a mobility management entity (MME) and a serving gateway (S-GW) / packet data network gateway (PDN). gateway, P-GW). The core network may also be an NR core network, which is not limited in this application.

Similarly, please refer to FIG. 14, which is a schematic diagram of another network architecture according to an embodiment of the present application. It can be considered that NR network equipment supports V2X multimedia broadcast multicast service (multimedia broadcast multicast service, MBMS) function. Also because only the user plane is involved, a connection can be established between the first network device and the second network device to forward the MBMS message. For example, when a first network device receives an MBMS establishment request message from a core network device, the first network device establishes a connection with the second network device, and instructs the second network device to perform MBMS broadcast. Alternatively, the second network device directly establishes a connection with an MBMS gateway (gateway, GW), receives an MBMS instruction from the MBMS, and performs MBMS broadcasting. At this time, after the first network device receives the MBMS establishment request from the core network device, it requests the second network device for an information element (for example, GTP TEID) for interpreting the MBMS GW information, and sends the information element to the core network device. , So that the core network device informs the MBMS that the GW sends the MBMS instruction directly to the second network device. Among them, GTP is a GPRS tunneling protocol (GPRS tunneling protocol), TEID is a tunnel endpoint identifier (tunnel endpoint identifier), and GPRS is a general packet radio service (general packet radio service). That is, in order to do MBMS on the SN, the MN can directly build the tunnel to the secondary station when establishing a tunnel with the MBMS and GW. Optionally, a tunnel may be established between the MN and the SN specifically for transmitting MBMS messages.

An embodiment of the present application further provides an apparatus for implementing any one of the foregoing methods. For example, an apparatus includes a unit (or means) for implementing each step performed by a terminal in any one of the foregoing methods. For another example, another apparatus is provided, which includes a unit (or means) for implementing each step performed by a network device in any one of the methods.

Please refer to FIG. 15, which is a schematic diagram of a V2X communication device according to an embodiment of the present application. The apparatus 1500 is used for a first network device. As shown in FIG. 15, the apparatus 1500 includes units or means for performing each step performed by the first network device in any one of the method embodiments above, and detailed descriptions of these steps can be applied to the apparatus. Examples. For example, the device 1500 includes a first communication unit 1510 and a second communication unit 1520. The first communication unit 1510 is configured to control communication between the first network device and the second network device. The first communication unit 1510 may use an interface between the first network device and the second network device (such as an X2 interface, and may also (Called Xn interface) to receive and send messages. The second communication unit 1520 is configured to control communication with the terminal; the second communication unit 1520 can receive and send messages through an interface (for example, an air interface) between the network device and the terminal. The interface here is a logical concept. In implementation, a corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface. The physical connection between nodes can be a wireless connection or a wired connection. For example, a wireless connection may be used between the network device and the terminal, and a wired connection may be used between the network devices.

For example, the first communication unit is configured to send a request message to the second network device and receive a response message from the second network device. The request message is used to request the second network device to configure a V2X resource for the terminal; the response message includes V2X Resource configuration information. The V2X resource configuration information is used to instruct a second network device to configure a V2X resource for the terminal. The second communication unit is configured to send V2X resource configuration information to the terminal.

The description about the request message and V2X resource configuration information is the same as the above embodiment. In addition, information about other first network devices to the second network device, and information received by the first network device from the second network device may be sent and received through the first communication unit, and details are not described herein again.

The apparatus 1500 may further include a unit for performing steps other than sending and receiving. For example, the determining unit 1530 is configured to determine that the second network device supports V2X services according to the V2X support information received by the first communication unit 1510 from the second network device, and trigger the first communication unit to send the above request message to the second network device.

As another example, the apparatus 1500 includes a determining unit 1540. When the second communication unit receives the first request from the terminal, the first request is used to request V2X resource authorization; the determination unit 1540 is used to determine a target network device, which is the first network device or the second network device, or The target network device is a first network device and a second network device, and the target network device is used to provide the requested V2X resource authorization.

As another example, the above device 1500 may include a third communication unit 1550, configured to communicate with a core network device. For example, the third communication unit 1550 receives instruction information from a core network device, where the instruction information is used to indicate a bearer for a V3 interface. The apparatus 1500 further includes a determining unit, configured to determine whether to establish a bearer to the first network device or the second network device according to the instruction information.

As another example, the second communication unit 1520 is configured to send V2X measurement configuration information to the terminal, where the V2X measurement configuration information includes a cell identifier of the second network device, V2X resource information of the cell of the second network device, and a V2X measurement event; and further It is used to receive the measurement result that the terminal measures and reports according to the V2X measurement configuration information. The communication device 1500 may include a generating unit for generating V2X measurement configuration information. Optionally, the generating unit may generate V2X measurement configuration information according to the information of the cell of the second network device acquired by the first communication unit 1510 from the second network device.

As another example, the second communication unit 1520 is configured to send a policy or instruction information to the terminal, where the policy is used to determine the target network device, and the instruction information is used to instruct the target network device, so that the terminal determines the target network device accordingly and uses the target network. V2X resources provided by the device authorize V2X communication. The communication device 1500 may include a generating unit for generating a policy or instruction information at this time.

As another example, the second communication unit 1520 is configured to receive a first request from a terminal, where the first request is used to request V2X resource authorization. The first network device may further include a determining unit for determining a target network device, where the target network device is a network device that provides V2X resource authorization, and is the first network device or the second network device, or the first network device and the second network device. Internet equipment. When the target network device includes the first network device, the first network device further includes a generating unit for generating a V2X resource authorization, and the second communication unit 1520 is further configured to send the V2X resource authorization to the terminal. When the target network device includes a second network device, the first communication unit 1510 is configured to send a second request to the second network device to request the second network device to perform V2X resource authorization for the terminal.

Please refer to FIG. 16, which is a schematic diagram of a V2X communication device according to an embodiment of the present application. The apparatus 1600 is used for a first network device. As shown in FIG. 16, the apparatus 1600 includes units or means for performing each step performed by the second network device in any one of the method embodiments, and detailed descriptions of these steps can be applied to the apparatus. Examples. For example, the device 1600 includes a first communication unit 1610 and a second communication unit 1620. The first communication unit 1610 is configured to control communication between the second network device and the first network device. The first communication unit 1610 may use an interface between the second network device and the first network device (such as an X2 interface, and may also (Called Xn interface) to receive and send messages. The second communication unit 1620 is configured to control communication with the terminal; the second communication unit 1620 can receive and send messages through an interface (for example, an air interface) between the network device and the terminal. The interface here is a logical concept. In implementation, a corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface. The physical connection between nodes can be a wireless connection or a wired connection. For example, a wireless connection may be used between the network device and the terminal, and a wired connection may be used between the network devices.

For example, the first communication unit 1610 is configured to receive a request message from the first network device, and the request message is used to request the second network device to configure a V2X resource for the terminal. The communication device 1600 further includes a configuration unit 1630 configured to configure a V2X resource for the terminal according to the request message. The second communication unit 1620 is further configured to send a response message to the first network device. The response message includes V2X resource configuration information and V2X resource configuration. The information is used to indicate the V2X resources configured for the terminal.

As another example, the first communication unit 1610 is configured to receive a request for V2X resource authorization from a first network device. The device 1600 may further include an authorization unit 1640 for providing a V2X resource authorization to the terminal according to the request.

Please refer to FIG. 17, which is a schematic diagram of a V2X communication device according to an embodiment of the present application. The device 1700 is used in a terminal. As shown in FIG. 17, the device 1700 includes units or means for performing each step performed by the terminal in any of the method embodiments of the above method, and detailed descriptions of these steps can be applied to this device embodiment. For example, the apparatus 1700 includes a communication unit 1710 for communication with a network device. The communication unit 1710 can receive and send messages through an interface (for example, an air interface) between a terminal and a network device. The interface here is a logical concept. In implementation, a corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface. The physical connection between nodes can be a wireless connection or a wired connection. For example, a wireless connection may be used between the network device and the terminal.

In an embodiment, the above device 1700 may further include a measurement unit 1720, configured to perform measurement according to the measurement configuration information to obtain a measurement result. The communication unit 1710 is further configured to report the measurement result.

In another embodiment, the above apparatus 1700 may further include a determining unit 1730 and a communication unit 1740, for determining a target network device, where the target network device is a first network device and / or a second network device. The communication unit 1740 uses the V2X resources configured by the target network device to perform V2X communication with other terminals. The manner in which the determining unit 1730 determines the target network device is the same as the foregoing method embodiment.

It should be understood that the division of the units in the above device is only a division of logical functions. In actual implementation, it may be fully or partially integrated into a physical entity, or it may be physically separated. And all units in the device can be implemented by software through the processing element call; all units can also be implemented by hardware; some units can also be implemented by software via the processing element call, and some units can be implemented by hardware. For example, each unit can be a separately established processing element, or it can be integrated into a chip of the device to achieve it. In addition, it can also be stored in the form of a program in the memory and called and executed by a certain processing element of the device. Features. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can again become a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or in a form called by software through a processing element.

In an example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (ASIC), or, one or Multiple microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), or a combination of at least two of these integrated circuit forms. As another example, when a unit in the device can be implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call a program. As another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

Any of the above communication units is an interface circuit of the device for receiving signals from or sending signals to other devices. For example, when the device is implemented as a chip, the communication unit is an interface circuit that the chip uses to receive signals from other chips or devices or an interface circuit that sends signals to other chips or devices.

Please refer to FIG. 18, which is a schematic structural diagram of a network device according to an embodiment of the present application. It is used to implement the operations of the first network device or the second network device in the above embodiments. As shown in FIG. 18, the network device includes an antenna 1810, a radio frequency device 1820, and a baseband device 1830. The antenna 1810 is connected to a radio frequency device 1820. In the uplink direction, the radio frequency device 1820 receives the information sent by the terminal through the antenna 1810, and sends the information sent by the terminal to the baseband device 1830 for processing. In the downlink direction, the baseband device 1830 processes the information of the terminal and sends it to the radio frequency device 1820. The radio frequency device 1820 processes the information of the terminal and sends it to the terminal via the antenna 1810.

The baseband device 1830 may include one or more processing elements 1831, including, for example, a main control CPU and other integrated circuits. In addition, the baseband device 1830 may further include a storage element 1832 and an interface 1833. The storage element 1832 is used to store programs and data. The interface 1833 is used to exchange information with the radio frequency device 1820. , CPRI). The above device for a network device (the first network device or the second network device) may be located in a baseband device 1830. For example, the above device for a network device may be a chip on the baseband device 1830, the chip including at least one processing element and An interface circuit, in which the processing element is configured to perform each step of any one of the methods performed by the network device, and the interface circuit is configured to communicate with other devices. In one implementation, the unit that the network device implements each step in the above method may be implemented in the form of a processing element scheduler. For example, an apparatus for a network device includes a processing element and a storage element. The processing element calls a program stored by the storage element, The method performed by the network device in the foregoing method embodiment is performed. The storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.

In another implementation, the unit that the network device implements each step in the above method may be configured as one or more processing elements, which are disposed on the baseband device. The processing element here may be an integrated circuit, for example: an Or multiple ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The unit that implements each step in the above method of the network device may be integrated together and implemented in the form of a system-on-a-chip (SOC). For example, the baseband device includes the SOC chip to implement the above method. At least one processing element and storage element may be integrated in the chip, and the method executed by the network device may be implemented by the processing element calling a stored program of the storage element; or, at least one integrated circuit may be integrated in the chip to implement the above network The method executed by the device; or, in combination with the above implementation manner, the functions of some units are implemented in the form of a program called by a processing element, and the functions of some units are implemented in the form of an integrated circuit.

It can be seen that the above apparatus for a network device (a first network device or a second network device) may include at least one processing element and an interface circuit, where at least one processing element is configured to execute any one of the network devices provided by the foregoing method embodiments. Method of implementation. The processing element may perform some or all of the steps performed by the network device in the first manner: by calling a program stored by the storage element; or in the second manner: by combining instructions in the hardware with integrated logic circuits in the processor element Some or all of the steps performed by the network device are performed in a manner of course; of course, some or all of the steps performed by the above network device may also be performed in combination with the first and second methods.

The processing elements here are the same as described above, and may be general-purpose processors, such as a CPU, or one or more integrated circuits configured to implement the above methods, such as: one or more ASICs, or one or more micro-processing Processor DSP, or one or more FPGAs, or a combination of at least two of these integrated circuit forms. A storage element may be a single memory or a collective term for multiple storage elements.

Please refer to FIG. 19, which is a schematic structural diagram of a terminal according to an embodiment of the present application. It may be the terminal in the above embodiments, and is used to implement the operation of the terminal in the above embodiments. As shown in FIG. 19, the terminal includes: an antenna 1910, a radio frequency portion 1920, and a signal processing portion 1930. The antenna 1910 is connected to the radio frequency part 1920. In the downlink direction, the radio frequency portion 1920 receives information sent by the network device through the antenna 1910, and sends the information sent by the network device to the signal processing portion 1930 for processing. In the uplink direction, the signal processing section 1930 processes the information of the terminal and sends it to the radio frequency section 1920. The radio frequency section 1920 processes the information of the terminal and sends it to the network device via the antenna 1910.

The signal processing section 1930 may include a modulation and demodulation subsystem to implement processing of each communication protocol layer of the data; it may also include a central processing subsystem to implement processing of the terminal operating system and the application layer; in addition, it may also include Other subsystems, such as multimedia subsystems and peripheral subsystems. Among them, the multimedia subsystem is used to control the terminal camera and screen display, and the peripheral subsystem is used to achieve connection with other devices. The modem subsystem can be a separately set chip. Optionally, the above device for a terminal may be located in the modulation and demodulation subsystem.

The modem subsystem may include one or more processing elements 1931, for example, including a main control CPU and other integrated circuits. In addition, the modem subsystem may further include a storage element 1932 and an interface circuit 1933. The storage element 1932 is used to store data and programs, but the program for executing the method executed by the terminal in the above method may not be stored in the storage element 1932, but stored in a memory other than the modem subsystem, and used When the modem subsystem is loaded. The interface circuit 1933 is used to communicate with other subsystems.

The above device for a terminal may be located in a modulation and demodulation subsystem, which may be implemented by a chip. The chip includes at least one processing element and an interface circuit, and the processing element is configured to perform any method performed by the terminal. Each step of the interface circuit is used to communicate with other devices. In one implementation, the unit that the terminal implements each step in the above method may be implemented in the form of a processing element scheduler. For example, a device for a terminal includes a processing element and a storage element, and the processing element calls a program stored by the storage element to execute the above. The method executed by the terminal in the method embodiment. The storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.

In another implementation, the program for executing the method executed by the terminal in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element. At this time, the processing element calls or loads the program from the off-chip storage element to the on-chip storage element to call and execute the method executed by the terminal in the foregoing method embodiments.

In another implementation, the unit that implements each step in the above method of the terminal may be configured as one or more processing elements, and these processing elements are provided on the modulation and demodulation subsystem. The processing elements here may be integrated circuits, such as : One or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The unit that implements each step in the above method in the terminal may be integrated together and implemented in the form of a system-on-a-chip (SOC). The SOC chip is used to implement the above method. At least one processing element and storage element may be integrated in the chip, and the method executed by the above terminal may be implemented by the processing element calling a stored program of the storage element; or, at least one integrated circuit may be integrated in the chip to implement the above terminal execution. Or, in combination with the above implementation, the functions of some units are implemented in the form of a program called by a processing element, and the functions of some units are implemented in the form of an integrated circuit.

It can be seen that the above apparatus for a terminal may include at least one processing element and an interface circuit, where at least one processing element is configured to execute any method performed by the terminal provided by the foregoing method embodiments. The processing element can execute some or all steps executed by the terminal in the first way: by calling a program stored in the storage element; or in the second way: by integrating the integrated logic circuit of the hardware in the processor element with the instruction Some or all of the steps performed by the terminal are performed in a manner; of course, some or all of the steps performed by the terminal may also be performed in combination with the first and second methods.

Those of ordinary skill in the art may understand that all or part of the steps of implementing the foregoing method embodiments may be completed by a program instructing related hardware. The foregoing program may be stored in a computer-readable storage medium. When the program is executed, the program is executed. The method includes the steps of the foregoing method embodiment. The foregoing storage medium includes: a ROM, a RAM, a magnetic disk, or an optical disk, and other media that can store program codes.

Claims

A V2X communication method includes:

The first network device sends a request message to the second network device, where the request message is used to request the second network device to configure a V2X resource for the terminal;

Receiving, by the first network device, a response message of the request message from the second network device, the response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate a V2X resource configured for the terminal;

Sending, by the first network device, the V2X resource configuration information to the terminal.
The method according to claim 1, wherein the request message includes V2X information of the terminal.
The method according to claim 2, wherein the V2X information of the terminal comprises one or more of the following information: V2X request indication, V2X authorization information, V2X aggregate maximum bit rate AMBR, V2X capability information, V2X maximum Transmit power, and V2X service type information.
The method according to any one of claims 1 to 3, further comprising:

Sending, by the first network device, the V2X service type information transferred to the second network device to the terminal.
The method according to any one of claims 1 to 4, wherein the V2X resource configuration information comprises a side-link wireless network temporary identification SL-RNTI and a V2X resource.
The method according to claim 5, wherein the V2X resource configuration information further comprises one or more of the following information: V2X synchronization configuration, synchronization reference type configuration, area configuration information, V2X inter-frequency information, edge The link transmission priority configuration parameters, the priority of the side link, the modulation and coding strategy MCS, and the transmission power.
The method according to any one of claims 1 to 6, further comprising:

Receiving, by the first network device, V2X support information from the second network device;

When the first network device determines that the second network device supports V2X services according to the V2X support information, the first network device sends the request message to the second network device.
The method according to claim 7, wherein the V2X support information comprises:

V2X capability information, used to indicate whether the second network device supports V2X services; or

A V2X service type, used to indicate a V2X service type supported by the second network device; or

A V2X quality of service QoS parameter, used to indicate a V2X QoS supported by the second network device; or

A frequency for providing a V2X service is used to indicate a frequency for the V2X service supported by the second network device.
The method according to any one of claims 1 to 8, further comprising:

The first network device sends notification information to a terminal, where the notification information is used to indicate that the first network device supports a capability of configuring more cell V2X resources for the terminal.
The method according to any one of claims 1 to 9, further comprising:

Sending, by the first network device, V2X measurement configuration information to a terminal, where the V2X measurement configuration information includes a cell identifier of the second network device, V2X resource information of a cell of the second network device, and a V2X measurement event;

Receiving, by the first network device, a measurement result that is measured and reported by the terminal according to the V2X measurement configuration information.
The method according to any one of claims 1 to 10, wherein the first network device and the second network device support a first radio access technology RAT and a second RAT, respectively, and the method further comprises :

Receiving the first network device from the terminal as a first request, where the first request is used to request V2X resource authorization;

The first network device determines a target network device, the target network device is a first network device or a second network device, or the target network device is a first network device and a second network device, and the target network device is used for Providing the requested V2X resource authorization;

Sending, by the first network device, indication information to the terminal, where the indication information is used to indicate the target network device.
The method according to claim 11, wherein when the target network device comprises a second network device, the method further comprises:

The first network device sends a second request to the second network device to request the V2X resource authorization from the second network device.
The method according to any one of claims 1 to 12, wherein the first network device and the second network device support a first RAT and a second RAT, respectively, and the method further comprises:

The first network device sends a policy to the terminal, where the policy is used to determine a target network device, wherein the target network device is a network device that provides V2X resource authorization, and is the first network device or the first network device. Two network equipment.
The method according to claim 13, wherein the policy comprises a correspondence between a service type and a RAT, or a correspondence between a QoS parameter and a RAT, or a correspondence between a service type and a network device, or a correspondence between a QoS parameter and a network device Relationship; or the policy includes a threshold value of a QoS parameter; or the policy includes a preset value or a preset range of the QoS parameter.
The method according to any one of claims 1 to 14, wherein the first network device and the second network device support a first RAT and a second RAT, respectively, and the method further comprises:

The first network device receives instruction information from a core network device, where the instruction information is used to indicate a bearer for a V3 interface, where the V3 interface is an interface between a terminal and a V2X control function entity;

The first network device determines to establish the bearer to the first network device or the second network device according to the instruction information.
A V2X communication device for a first network device includes:

A first communication unit, configured to send a request message to a second network device, where the request message is used to request the second network device to configure a V2X resource for the terminal;

The first communication unit is further configured to receive a response message of the request message from the second network device, where the response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate configuration for the terminal. V2X resources;

A second communication unit, configured to send the V2X resource configuration information to the terminal.
The apparatus according to claim 16, wherein the request message includes V2X information of the terminal.
The device according to claim 17, wherein the V2X information of the terminal comprises one or more of the following information: V2X request indication, V2X authorization information, V2X aggregate maximum bit rate AMBR, V2X capability information, V2X maximum Transmit power, and V2X service type information.
The device according to any one of claims 16 to 18, wherein the second communication unit is further configured to:

Sending to the terminal the V2X service type information transferred to the second network device.
The device according to any one of claims 16 to 19, wherein the V2X resource configuration information comprises a side-link wireless network temporary identifier SL-RNTI and a V2X resource.
The device according to claim 20, wherein the V2X resource configuration information further comprises one or more of the following information: V2X synchronization configuration, synchronization reference type configuration, area configuration information, V2X inter-frequency information, edge The link transmission priority configuration parameters, the priority of the side link, the modulation and coding strategy MCS, and the transmission power.
The device according to any one of claims 16 to 21, further comprising a first determining unit, wherein:

The first communication unit is further configured to receive V2X support information from the second network device;

The first determining unit is configured to determine that the second network device supports V2X services according to the V2X support information, and the first communication unit is configured to determine that the second network device supports the first determining unit. Sending a request message to the second network device during a V2X service.
The apparatus according to claim 22, wherein the V2X support information comprises:

V2X capability information, used to indicate whether the second network device supports V2X services; or

A V2X service type, used to indicate a V2X service type supported by the second network device; or

A V2X quality of service QoS parameter, used to indicate a V2X QoS supported by the second network device; or

A frequency for providing a V2X service is used to indicate a frequency for the V2X service supported by the second network device.
The device according to any one of claims 16 to 23, wherein the second communication unit is further configured to:

Send notification information to the terminal, where the notification information is used to indicate the ability of the first network device to support the configuration of more cell V2X resources for the terminal.
The device according to any one of claims 16 to 24, wherein the second communication unit is further configured to:

Sending V2X measurement configuration information to the terminal, where the V2X measurement configuration information includes a cell identifier of the second network device, V2X resource information of a cell of the second network device, and a V2X measurement event;

Receiving a measurement result that the terminal performs measurement according to the V2X measurement configuration information and reports.
The apparatus according to any one of claims 16 to 25, wherein the first network device and the second network device support a first radio access technology RAT and a second RAT, respectively, and the apparatus further includes Second determination unit:

The second communication unit is further configured to receive a first request from a terminal, where the first request is used to request V2X resource authorization;

The second determining unit is configured to determine a target network device, where the target network device is a first network device or a second network device, or the target network device is a first network device and a second network device, and the target network device For providing the requested V2X resource authorization;

The second communication unit is further configured to send instruction information to the terminal, where the instruction information is used to indicate the target network device.
The apparatus according to claim 26, wherein when the target network device includes a second network device, the first communication unit is further configured to:

And sending a second request to the second network device to request the V2X resource authorization from the second network device.
The apparatus according to any one of claims 16 to 27, wherein the first network device and the second network device support a first RAT and a second RAT, respectively, and the second communication unit is further configured to: :

And sending a policy to the terminal, where the policy is used to determine a target network device, where the target network device is a network device that provides V2X resource authorization and is the first network device or the second network device.
The apparatus according to claim 28, wherein the policy comprises a correspondence between a service type and a RAT or a correspondence between a QoS parameter and a RAT, or a correspondence between a service type and a network device or a correspondence between a QoS parameter and a network device Relationship; or the policy includes a threshold value of a QoS parameter; or the policy includes a preset value or a preset range of the QoS parameter.
The apparatus according to any one of claims 16 to 29, wherein the first network device and the second network device support a first RAT and a second RAT, respectively, and the apparatus further comprises:

A third communication unit, configured to receive instruction information from a core network device, where the instruction information is used to indicate a bearer for a V3 interface, where the V3 interface is an interface between a terminal and a V2X control function entity;

A third determining unit is configured to determine to establish a bearer to the first network device or the second network device according to the instruction information.
A V2X communication device connected to a memory and used to read and execute a program stored in the memory to execute the method according to any one of claims 1 to 15.
A computer-readable storage medium includes a program, which is used to implement the method according to any one of claims 1 to 15 when the program is executed by a processor.
A V2X communication method includes:

The second network device receives a request message from the first network device, the request message is used to request the second network device to configure a V2X resource for the terminal;

Configuring, by the second network device, a V2X resource for the terminal according to the request message;

The second network device sends a response message to the first network device, where the response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate a V2X resource configured for the terminal.
The method according to claim 33, wherein the request message includes V2X information of the terminal.
The method according to claim 34, wherein the V2X information of the terminal comprises one or more of the following information: V2X request indication, V2X authorization information, V2X aggregate maximum bit rate AMBR, V2X capability information, V2X maximum Transmit power, and V2X service type information.
The method according to any one of claims 33 to 35, wherein the V2X resource configuration information comprises a side-link wireless network temporary identification SL-RNTI and a V2X resource.
The method according to claim 36, wherein the V2X resource configuration information further comprises one or more of the following information: V2X synchronization configuration, synchronization reference type configuration, area configuration information, V2X inter-frequency information, edge The link transmission priority configuration parameters, the priority of the side link, the modulation and coding strategy MCS, and the transmission power.
The method according to any one of claims 33 to 37, further comprising:

The second network device sends V2X support information to the first network device.
The method according to claim 38, wherein the V2X support information comprises:

V2X capability information, used to indicate whether the second network device supports V2X services; or

A V2X service type, used to indicate a V2X service type supported by the second network device; or

A V2X quality of service QoS parameter, used to indicate a V2X QoS supported by the second network device; or

A frequency for providing a V2X service is used to indicate a frequency for the V2X service supported by the second network device.
The method according to any one of claims 33 to 39, wherein the first network device and the second network device respectively support a first radio access technology RAT and a second RAT, and the method further comprises :

Receiving, by the second network device, a request for V2X resource authorization from the first network device;

The second network device provides the terminal with the V2X resource authorization according to the request.
A V2X communication device for a second network device includes:

A communication unit, configured to receive a request message from a first network device, where the request message is used to request the second network device to configure a V2X resource for a terminal;

A configuration unit, configured to configure a V2X resource for the terminal according to the request message;

The communication unit is further configured to send a response message to the first network device, where the response message includes V2X resource configuration information, and the V2X resource configuration information is used to indicate a V2X resource configured for the terminal.
The apparatus according to claim 41, wherein the request message includes V2X information of the terminal.
The device according to claim 42, wherein the V2X information of the terminal comprises one or more of the following information: V2X request indication, V2X authorization information, V2X aggregate maximum bit rate AMBR, V2X capability information, V2X maximum Transmit power, and V2X service type information.
The device according to any one of claims 41 to 43, wherein the V2X resource configuration information includes a side-link wireless network temporary identifier SL-RNTI and a V2X resource.
The device according to claim 44, wherein the V2X resource configuration information further comprises one or more of the following information: V2X synchronization configuration, synchronization reference type configuration, area configuration information, V2X inter-frequency information, edge The link transmission priority configuration parameters, the priority of the side link, the modulation and coding strategy MCS, and the transmission power.
The device according to any one of claims 41 to 45, wherein the communication unit is further configured to:

Sending V2X support information to the first network device.
The apparatus according to claim 46, wherein the V2X support information comprises:

V2X capability information, used to indicate whether the second network device supports V2X services; or

A V2X service type, used to indicate a V2X service type supported by the second network device; or

A V2X quality of service QoS parameter, used to indicate a V2X QoS supported by the second network device; or

A frequency for providing a V2X service is used to indicate a frequency for the V2X service supported by the second network device.
The apparatus according to any one of claims 41 to 47, wherein the first network device and the second network device support a first radio access technology RAT and a second RAT, respectively, and the apparatus further includes Authorization unit:

The communication unit is further configured to receive a request for V2X resource authorization from the first network device;

The authorization unit is configured to provide the terminal with the V2X resource authorization according to the request.
A V2X communication device connected to a memory and used to read and execute a program stored in the memory to execute the method according to any one of claims 33 to 40.
A computer-readable storage medium includes a program, and when the program is executed by a processor, the method is used to implement the method according to any one of claims 33 to 40.