CN110198516B - Method and device for establishing network connection - Google Patents

Abstract

The disclosure provides a network connection establishing method and device, and belongs to the technical field of Internet of vehicles. The method comprises the following steps: sending a first service query request comprising the position information and the service identification of the user entity to a control server, so that the control server queries a first application server address according to the position information and the service identification of the user entity and sends the first application server address to the user entity; receiving a first application server address, and sending a service acquisition request to a first application server corresponding to the first application server address, wherein the service acquisition request comprises a user entity identifier and a service identifier, and the service acquisition request is used for the first application server to provide a service corresponding to the service identifier to a user entity corresponding to the user entity identifier. In the present disclosure, the application server that establishes a network connection with the user entity is selected by the control server according to the location information and the service identifier, and the application server can provide a service for the control server quickly, so that the timeliness is better.

Description

Method and device for establishing network connection

technical field

The present disclosure relates to the technical field of Internet of Vehicles, and in particular, to a method and device for establishing a network connection.

Background technique

Vehicle to Everything (V2X) means that vehicles and everything are interconnected through in-vehicle ad hoc networks and various heterogeneous networks. The interconnection methods of V2X include Vehicle to Vehicle (V2V), Vehicle to Infrastructure (V2I), Vehicle to Pedestrians (V2P), Vehicle to Cloud (V2C) Wait. Based on the V2X technology, the V2X user entity (User Entity, UE) can obtain the services provided by the V2X AS by establishing a network connection with the V2X application server (Application Server, AS), such as traffic condition reminder service, driving data sharing service, etc. Service plays an important role in traffic safety, traffic efficiency, energy conservation and emission reduction, and has become an indispensable part of modern transportation.

At present, the V2X Phase II specification (TS 23.285) released by the 3rd Generation Partnership Project (3GPP) provides the following recommendations for establishing network connections between V2X UEs and V2X ASs: V2X UEs use the Anycast method to The network sends a service acquisition request including the service ID. When receiving the service acquisition request, the routing device in the network determines multiple V2X ASs that can provide the service in the network according to the service ID, and measures the transmission of the service acquisition request from the current node to the The number of nodes routed by each V2X AS, and then the service request is sent to the V2X AS with the least number of routed nodes to establish a network connection between the V2X UE and the V2X AS.

Due to the high timeliness requirements of V2X services, the V2X AS selected by the Anycast method is only the V2X AS with the smallest number of route nodes. In fact, the number of route nodes does not reflect the distance between the V2X UE and the V2X AS. The V2X AS selected by Anycast has poor timeliness and cannot meet the needs of V2X services.

SUMMARY OF THE INVENTION

In order to solve the problems in the related art, the embodiments of the present disclosure provide a method and apparatus for establishing a network connection. The technical solution is as follows:

A first aspect provides a method for establishing a network connection. A user entity sends a first service query request to a control server, where the first service query request includes location information and a service identifier of the user entity. When the first service query request is received At the time, the control server queries the address of the first application server according to the location information and service identifier of the user entity, and sends the address of the first application server to the user entity. The user entity receives the first application server address sent by the control server, and sends a service acquisition request to the first application server corresponding to the first application server address, where the service acquisition request includes the user entity identifier and the service identifier. When receiving the service acquisition request, The first application server provides the service corresponding to the service identifier to the user entity corresponding to the user entity identifier.

In the solution shown in the embodiments of the present disclosure, the control server selects an application server that can quickly provide services for the user entity according to the location information of the user entity itself and the service identifier of the required service, which improves the timeliness of the service and satisfies the V2X business requirements.

In a possible design, the address of the first application server includes the domain name and port number of the edge application server. In this case, before sending the service acquisition request to the first application server corresponding to the address of the first application server, the user entity may also The domain name system sends a domain name query request, and the domain name query request includes the domain name of the edge application server. When receiving the domain name query request, the domain name system queries the IP (Internet Protocol Address, Internet Protocol) address of the edge application server corresponding to the domain name of the edge application server , and send the IP address of the edge application server to the user entity. Based on the received IP address of the edge server and the port number of the edge server, the user entity sends a service acquisition request to the edge application server corresponding to the IP address and port number of the edge application server.

The solutions shown in the embodiments of the present disclosure make the service initiation process more targeted by acquiring the IP address of the edge application server and initiating a service acquisition request based on the acquired address.

In another possible design, when the first application server address includes the IP address of the cloud application server, the user entity can send the service acquisition to the cloud application server corresponding to the cloud application server's IP address according to the cloud application server's IP address ask.

The solution shown in the embodiment of the present disclosure makes the service initiation process more targeted by acquiring the IP address of the cloud application server and initiating a service acquisition request based on the acquired address.

In another possible design, when the service corresponding to the service identifier is obtained, the user entity may send a first notification message to the control server, where the first notification message includes the user entity identifier, the service identifier and the first application server address, The first notification message is used for the control server to store the correspondence between the user entity identifier, the service identifier and the address of the first application server.

In the solution shown in the embodiments of the present disclosure, by sending the first notification message to the control server, the control server can be made to store the user entity identifier, the service identifier and the address of the first application server, so that subsequent disaster recovery and recovery can be performed according to the current connection relationship. Data synchronization process.

In another possible design, when the control server detects that the service corresponding to the service identifier provided by the first application server is unavailable, the control server obtains the address of the second application server that can provide the available service, and sends a service address change message to the user entity. The user entity receives the service address change message sent by the control server, and then establishes a network connection with the second application server.

In the solutions shown in the embodiments of the present disclosure, when the service provided by the first application server is unavailable, it can switch to other application servers that can provide available services, thereby ensuring service continuity and improving service quality.

In another possible design, after the user entity establishes a network connection with the control server, the user entity will also send a second notification message to the control server, where the second notification message is used for the control server to store the user entity identifier, service identifier and The correspondence between addresses of the second application server.

In the solution shown in the embodiments of the present disclosure, by sending the second notification message to the control server, the control server can store the correspondence between the user entity, the service identifier and the address of the second application server, so that the stored correspondence can be Services are monitored.

In another possible design, when the location information change is detected, the user entity sends a second service query request to the control server, where the second service query request includes the updated location information of the user entity and the service identifier, the second service query request The query request is used to control the server to query the address of the third application server, trigger the first application server and the third application server corresponding to the address of the third application server to perform data synchronization, and send the address of the third application server to the user entity. The third application server address, the user entity establishes a network connection with the third application server corresponding to the third application server address.

In the solution shown in the embodiments of the present disclosure, when a user entity detects a change in its own location, data is synchronized between the two application servers before and after the location change, and a new network connection is established to ensure service continuity.

In another possible design, the user entity sends a third notification message to the control server, where the third notification message is used for the control server to store the correspondence between the user entity identifier, the service identifier and the address of the third application server.

In the solution shown in the embodiment of the present disclosure, by sending the second notification message to the control server, the control server can be made to store the correspondence between the user entity, the service identifier and the address of the third application server, so that according to the stored correspondence, Services are monitored.

In a second aspect, a method for establishing a network connection is provided. The method includes: a control server receives a first service query request from a user entity, where the first service query request includes location information and a service identifier of the user entity. The location information and service identifier of the entity, query the address of the first application server, and send the address of the first application server to the user entity. When receiving the address of the first application server, the user entity sends the first application corresponding to the address of the first application server to the user entity. The server sends a service acquisition request, where the service acquisition request includes the user entity identifier and the service identifier.

In the solution shown in the embodiments of the present disclosure, the control server selects an application server that can quickly provide services for the user entity according to the location information of the user entity itself and the service identifier of the required service, which improves the timeliness of the service and satisfies the V2X business requirements.

In a possible design, the first service query request further includes the mobile edge computing server address of the mobile edge computing server located on the uplink of the user entity. When receiving the first service query request, the control server will Calculate the server address and service identifier, query the domain name and port number of the edge application server, and then use the domain name and port number of the edge application server as the first application server address.

The solutions shown in the embodiments of the present disclosure provide a method for querying the address of a first application server.

In another possible design, the control server queries the IP address of the cloud application server according to the location information and service identifier of the user entity, and then uses the IP address of the cloud application server as the first application server address.

The solutions shown in the embodiments of the present disclosure provide another method for querying the address of the first application server.

In another possible design, after the user entity establishes a network connection with the first application server and obtains the service provided by the first application server, the user entity will also send a first notification message to the control server, the first notification message It includes the user entity identifier, the service identifier and the first application server address. When receiving the first notification message sent by the user entity, the control server stores the correspondence between the user entity identifier, the service identifier and the address of the first application server.

In the solution shown in the embodiment of the present disclosure, the control server can monitor the service according to the stored correspondence by storing the correspondence between the user entity identifier, the service identifier and the address of the first application server.

In another possible design, when it is detected that the service corresponding to the service identifier provided by the first application server is unavailable, the control server obtains the address of the second application server that can provide the available service, and sends a service address change message to the user entity, The service address change message includes the second application server address, and the service address change message is used for the user entity to establish a network connection with the second application server corresponding to the second application server address.

In another possible design, the control server may, according to the service ID, query whether there are other edge service addresses that can provide available services in the service status table, where the service status table stores the service ID, application server address and service availability status The corresponding relationship between the two, and then obtain the address of the second application server according to whether it exists or not. Specifically, if it exists, the control server uses other edge service addresses as the second application server address; if not, the control server uses the IP address of the cloud application server as the second application server address.

In the solution shown in the embodiments of the present disclosure, according to the service availability status in the service status table, a second application server that can quickly provide available services to the user entity is selected, and the service provision time is shortened as much as possible on the premise of ensuring service availability .

In another possible design, the control server will also receive a status report sent by the mobile edge computing server and the cloud application server, where the status report includes the addresses of each edge application server, etc. According to the received status report, the control server maintains the service Status table.

In the solution shown in the embodiment of the present disclosure, the control server maintains the service availability status of the services provided by each edge application server in the service status table by receiving the status report, so as to select the application server that can provide the available service for the user entity.

In another possible design, the control server receives a second notification message sent by the user entity, where the second notification message includes the user entity identifier, the service identifier and the address of the second application server, and further stores the user entity identifier, the service identifier and the second application server address. The correspondence between the two application server addresses.

In another possible design, when the user entity detects a change in location information, it can send a second service query request to the control server, where the second service query request includes the updated location information and service identifier of the user entity. The second service query request of the user entity. The user entity obtains the address of the third application server according to the updated location information and the service identifier of the user entity, and sends a data synchronization request to the first application server. The data synchronization request includes the user entity identifier, service identifier and service identifier. The identifier and the address of the third application server. The data synchronization request is used for the first application server to synchronize data with the third application server corresponding to the address of the third application server, and to send a data synchronization response to the control server after the data synchronization is completed. When receiving the data synchronization response, the control server sends a third application server address to the user entity, where the third service address is used for the user entity to establish a network connection with the third application server.

In another possible design, the control server receives a third notification message sent by the user entity, where the third notification message includes the user entity identifier, the service identifier and the address of the third application server. When receiving the third notification message, the user entity The correspondence between the user entity identifier, the service identifier and the address of the third application server is stored.

In a third aspect, a method for establishing a network connection is provided. The method includes: a mobile edge computing server receives a first service query request sent by a user entity, where the first service query request includes location information and a service identifier of the user entity, and then Add the mobile edge computing server address to the first service query request, and send the first service query request including the mobile edge computing server address to the control server, where the first service query request including the mobile edge computing server address is used for control The server queries the domain name and port number of the edge application server according to the location information, service identifier and mobile edge computing server address of the user entity, and sends the domain name and port number of the edge application server to the user entity. The domain name and port number of the edge application server are used for The user entity establishes a network connection with the edge application server.

According to the solution shown in the embodiments of the present disclosure, the mobile edge computing server adds its own address to the first service query request of the user entity, so that the control server can be based on the location information of the user entity, the service identifier of the required service and the mobile edge computing server. address, and select the edge application server that can quickly provide services for the user entity, thus ensuring the timeliness of the business.

In a possible implementation manner, the mobile edge computing server receives a service acquisition request sent by a user entity, where the service acquisition request includes the user entity identifier and the service identifier, and then the mobile edge computing server sends the service acquisition request to the edge application server, The edge application server provides the service corresponding to the service identifier to the user entity corresponding to the user entity identifier.

In another possible implementation manner, the mobile edge computing server may receive a status report sent by each edge application server, where the status report includes the address of the edge application server, etc., and then send the status report to the control server, where the status report is used to control The server maintains a service state table, and the service state table stores the correspondence between the service identifier, the address of the application server and the available state.

In a fourth aspect, a user entity is provided, and the user entity has the functions of the user entity in the above method for establishing a network connection. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the user entity includes a processing unit and a communication unit, and the processing unit is configured to support the user entity to perform the corresponding functions in the above method. The communication unit is used to support communication between the user entity and other devices. The user entity may further comprise a storage unit for coupling with the processing unit, which stores necessary program instructions and data of the user entity. As an example, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.

In another possible design, the structure of the user entity includes a sending unit, a receiving unit, and a connecting unit, and these units can perform the corresponding functions in the above example of the method for establishing a network connection. For details, refer to the detailed description in the method embodiment. It is not repeated here.

In a fifth aspect, a control server is provided, and the control server has the function of the control server in the above-mentioned method for establishing a network connection. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the control server includes a processing unit and a communication unit, and the processing unit is configured to support the control server to perform the corresponding functions in the above method. The communication unit is used to support communication between the control server and other devices. The control server may further include a storage unit for coupling with the processing unit, which stores program instructions and data necessary to control the server. As an example, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.

In another possible design, the structure of the control server includes a receiving unit, a querying unit, a sending unit, a storage unit, an obtaining unit and a maintenance unit, and these units can perform the corresponding functions in the above example of the method for establishing a network connection. Refer to the detailed description in the method embodiment, which is not repeated here.

In a sixth aspect, a mobile edge computing server is provided, and the mobile edge computing server has the function of the mobile edge computing server in the above method for establishing a network connection. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the mobile edge computing server includes a processing unit and a communication unit, and the processing unit is configured to support the mobile edge computing server to perform the corresponding functions in the above method. The communication unit is used to support communication between the mobile edge computing server and other devices. The mobile edge computing server may further include a storage unit, the storage unit is configured to be coupled with the processing unit, and stores necessary program instructions and data of the mobile edge computing server. As an example, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.

In another possible design, the structure of the mobile edge computing server includes a receiving unit, an address adding unit, and a sending unit, and these units can perform the corresponding functions in the above example of the method for establishing a network connection. The detailed description will not be repeated here.

In a seventh aspect, a network device is provided, the network device includes a memory, a processor, a transceiver, and a bus, wherein the memory, the processor, and the transceiver are connected to each other through a bus, and the memory is used to store computer instructions, and when the network device runs When the processor executes the computer instructions, the network device executes the method for establishing a network connection described in the first aspect.

In an eighth aspect, a network device is provided, the network device includes a memory, a processor, a transceiver, and a bus, wherein the memory, the processor, and the transceiver are connected to each other through a bus, and the memory is used to store computer instructions, and when the network device runs When the processor executes the computer instructions, the network device executes the method for establishing a network connection described in the second aspect.

In a ninth aspect, a network device is provided, the network device includes a memory, a processor, a transceiver, and a bus, wherein the memory, the processor, and the transceiver are connected to each other through a bus, and the memory is used to store computer instructions, and when the network device runs When the processor executes the computer instructions, the network device executes the method for establishing a network connection described in the third aspect.

A tenth aspect provides a system for establishing a network connection, where the system for establishing a network connection includes any network device: the user entity described in the fourth aspect, the control server described in the fifth aspect, and the system described in the sixth aspect. Mobile edge computing servers. In another possible design, other devices that interact with the user entity, the control server, or the mobile edge computing server in the solutions provided by the embodiments of the present disclosure may also be included.

In an eleventh aspect, a computer-readable storage medium is provided, which is used for storing computer software instructions used by the above-mentioned user entity, which includes the program designed for executing the above-mentioned first aspect.

A twelfth aspect provides a computer-readable storage medium for storing computer software instructions used by the above-mentioned control server, which includes a program for executing the above-mentioned second aspect.

A thirteenth aspect provides a computer-readable storage medium for storing computer software instructions used by the above mobile edge computing server, which includes a program for executing the above designed program in the third aspect.

A fourteenth aspect provides a computer program product containing instructions that, when executed on a computer device, cause the computer to execute the method for establishing a network connection described in the above aspects.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure are:

In the present disclosure, the application server that establishes the network connection with the user entity is selected by the control server according to the location information and the service identifier. The application server can quickly provide services for the user entity, so the timeliness is better.

Description of drawings

1 is an architecture diagram of a system for establishing a network connection provided by an embodiment of the present disclosure;

2A is a schematic structural diagram of a network device provided by an embodiment of the present disclosure;

2B is a schematic structural diagram of a network device provided by an embodiment of the present disclosure;

3 is a flowchart of a method for establishing a network connection provided by an embodiment of the present disclosure;

4 is a schematic diagram of a process of establishing a network connection provided by an embodiment of the present disclosure;

5 is a flowchart of a method for establishing a network connection provided by an embodiment of the present disclosure;

6 is a schematic diagram of a process of establishing a network connection provided by an embodiment of the present disclosure;

7 is a flowchart of a method for establishing a network connection provided by an embodiment of the present disclosure;

8 is a schematic diagram of a process of establishing a network connection provided by an embodiment of the present disclosure;

9 is a schematic structural diagram of a user entity provided by an embodiment of the present disclosure;

10 is a schematic structural diagram of a control server provided by an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a mobile edge computing server provided by an embodiment of the present disclosure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

Before describing the embodiments of the present disclosure in detail, a plurality of network devices involved in the present disclosure will be introduced.

Application server: In the V2X scenario, it is represented by V2X AS, including Edge V2X AS and Cloud V2X AS, which are mainly used to provide V2X services related to the application layer and keep V2X service heartbeat with V2X CF.

User entity: In the V2X scenario, it is represented by V2X UE, which is mainly used to obtain services from V2X AS.

Control server: In the V2X scenario, it is represented by V2X CF, which is mainly used to provide related services at the network layer and dynamically select the V2X AS for the V2X UE.

Mobile edge computing server: In the V2X scenario, represented by MEC, located between the base station and the packet core network and closer to the base station. The regional deployment of MEC is mainly used to add the MEC address to the V2X AS query request during the V2X service provision process, and to report the Edge V2X AS heartbeat information to the V2X CF to maintain the heartbeat between the Edge V2X AS and the V2X CF.

FIG. 1 shows an architecture diagram of a system for establishing a network connection. The network connection system includes Cloud V2XAS, multiple Edge V2X ASs, MECs, multiple base stations, multiple V2X UEs, and V2X CFs.

The connection relationship of each network device is as follows:

1. Cloud V2X AS is built on IoT Platform, Edge V2X AS is built on MEC Platform, and each MEC Platform is deployed with multiple Edge V2X ASs that can provide the same V2X service. Cloud V2X AS, EdgeV2X AS and V2X CF pass through The established network connection forms a control plane that can receive various commands sent by the V2X CF;

2. The V2X UE and the V2X CF form a control plane through the established network connection, which can receive various instructions sent by the 2X CF;

3. The V2X UE forms a data plane with Cloud V2X AS and Edge V2X AS through the established network connection, and can obtain V2X services from Cloud V2X AS or Edge V2X AS;

4. Cloud V2X AS and Edge V2X AS form a data plane through the established network connection. In this data plane, data exchange and data synchronization can be performed between Cloud V2X AS and Edge V2X AS, and between Edge V2X AS and Edge V2X AS. Data interaction and data synchronization can also be performed;

5. The base station establishes network connection with V2X UE and Cloud V2X AS or Edge V2X AS, which can provide V2X service for V2X UE.

The functions implemented by each network device are as follows:

1. In the MEC coverage scenario, the V2X UE can access the Edge V2X AS through the MEC Platform, and then obtain the required V2X services from the Edge V2X AS; in the MEC coverage scenario, the V2X UE can directly access CloudV2X AS, and then obtain the required V2X services from the Cloud V2X AS;

2. The same MEC Platform can support multiple V2X services and multiple Edge V2X ASs;

3. Considering Edge V2X AS disaster recovery, the same MEC Platform deploys multiple Edge V2XAS instances for the same V2X service;

4. When multiple Edge V2X ASs on the MEC Platform cannot provide V2X services, Cloud V2X ASs can provide V2X services;

5. The V2X CF can select the appropriate V2X AS based on the location information of the V2X UE, the MEC address and the V2X service identifier;

6. The V2X CF maintains the heartbeat with the V2X AS through the MEC to maintain the availability of the V2X AS and V2X services;

7. V2X UE can conduct V2X communication with Edge V2X AS or Cloud V2X AS;

8. Data synchronization is performed during V2X AS switching.

FIG. 2A shows a schematic structural diagram of a network device involved in an embodiment of the present disclosure. The network device 200 includes: a storage unit 201 , a processing unit 202 and a communication unit 203 , where the storage unit 201 is used to store program codes and data of the network device 200 . The network device can be a user entity, a control server and a mobile edge computing server.

When the network device 200 is a user entity, the network device 200 is used to implement the functions of the user entity in the method for establishing a network connection in FIG. 3 or FIG. 5 or FIG. 7 . The processing unit 202 is used to control and manage the actions of the user entity, and the communication unit 203 is used to support the user entity to communicate with other network entities.

When the network device 200 is a control server, the network device 200 is used to implement the function of the control server in the method for establishing a network connection in FIG. 3 or FIG. 5 or FIG. 7 . The processing unit 202 is used to control and manage the actions of the control server, and the communication unit 203 is used to support the control server to communicate with other network entities.

When the network device 200 is a mobile edge computing server, the network device 200 is used to implement the function of the mobile edge computing server in the method for establishing a network connection in FIG. 3 or FIG. 5 or FIG. 7 . The processing unit 202 is used to control and manage the actions of the mobile edge computing server, and the communication unit 203 is used to support the mobile edge computing server to communicate with other network entities.

The processing unit 202 may be a processor or a controller, for example, a central processing unit (Central Processing Unit, CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application-Specific Integrated Circuit) Circuit, ASIC), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit 203 may be a transceiver. The storage unit 201 may be a memory.

When the storage unit 201 is a memory, the processing unit 202 is a processor, and the communication unit 203 is a transceiver, the network device involved in the embodiment of the present disclosure may be the network device shown in FIG. 2B .

Referring to FIG. 2B , the network device includes: a memory 201 , a processor 202 , a transceiver 203 , and a bus 204 . Among them, the memory 201, the processor 202, and the transceiver 203 are connected to each other through the bus 204, and the memory 201 is used to store computer instructions. When the network device is running, the processor 202 runs the computer instructions, so that the network device realizes FIG. 3 or FIG. 5 or FIG. The method for establishing a network connection in 7. The bus 204 may be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (EISA for short) bus or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 2B, but it does not mean that there is only one bus or one type of bus.

Based on the architecture diagram of the system for establishing a network connection shown in FIG. 1 , an embodiment of the present disclosure provides a method for establishing a network connection. Referring to FIG. 3 , the flow of the method provided by the embodiment of the present disclosure includes:

301. The user entity sends a first service query request to the control server.

When the user entity needs to obtain the service due to business requirements, the user entity may send a first service query request to the control server. The first service query request includes the location information and service identification of the user entity, etc. The location information of the user entity includes TAI (Tracking Area Identity, tracking area identification), cell identification Cell-ID or E-SMLC (Evolved Serving Mobile Location Center, Evolved Service Mobile Location Center) location information obtained by positioning, etc.

In an embodiment of the present disclosure, if a mobile edge computing server is deployed on the uplink of the user entity, the mobile edge computing server may intercept the first service query request and add the mobile edge computing server address to the first service query request , and then send the first service query request including the mobile edge computing server address to the control server.

In another embodiment of the present disclosure, if the mobile edge computing server is not deployed on the uplink of the user entity, the first service query request will be directly sent to the control server.

302. When receiving the first service query request from the user entity, the control server queries the address of the first application server according to the location information and the service identifier of the user entity, and sends the address of the first application server to the user entity.

Whether a mobile edge computing server is deployed in the uplink of the user entity can be divided into two situations:

In the first case, a mobile edge computing server is deployed upstream of the user entity.

In this case, after receiving the first service query request including the mobile edge service address, the control server will query the corresponding edge application server domain name and port number according to the location information of the user entity, the mobile edge computing server address and the service identifier. , and then send the edge application server domain name and port number as the first application server address to the user entity. During the actual query, the control server can also query the domain name and port number of the corresponding edge application server according to the mobile edge computing server address and service identifier. For example, if the MEC address obtained from the first service query request is IP address 1 and the service ID is V2X service ID 2, then the corresponding edge application server domain name can be obtained by querying Table 1 as domain name 1 and the port number as port number 2.

Table 1

MEC address V2X service identification V2X AS domain name/IP address V2X AS port number IP address 1 V2X Service ID 1 Domain Name 1/IP Address 1 port number 1 IP address 1 V2X Service Identity 2 Domain Name 1/IP Address 1 port number 2 IP address 2 V2X Service ID 1 Domain Name 2/IP Address 2 port number 1

The domain name and port number of the edge application server can be intercepted by the mobile edge computing server during the transmission process from the control server to the user entity, and then sent by the mobile edge computing server to the user entity. When receiving the domain name and port number of the edge application server, the user entity needs to send a domain name query request to the domain name system. The domain name query request includes the domain name of the edge application server, and the domain name system queries the IP address of the edge application server corresponding to the domain name of the edge application server. Then, the IP address of the edge application server is sent to the user entity. Based on the received IP address and port number of the edge server, the user entity sends a service acquisition request to the edge application server corresponding to the IP address and port number of the edge application server.

In the second case, the mobile edge computing server is not deployed in the uplink of the user entity.

In view of this situation, the control server can query the IP address of the cloud application server according to the location information and service identifier of the user entity, take the IP address of the cloud application server as the first application server address, and then send the corresponding IP address to the cloud application server. The cloud application server sends a service acquisition request.

303. When receiving the first application server address, the user entity sends a service acquisition request to the first application server corresponding to the first application server address.

For the scenario where the user entity is deployed with a mobile edge computing server upstream, after receiving the IP address and port number of the edge application server, the user entity can send a service acquisition request to the edge application server corresponding to the IP address and port number of the edge application server. The service acquisition request includes the user entity identifier and the service identifier. In this process, if the mobile edge computing server has the offload capability, the mobile edge computing server can directly send the service acquisition request to the edge application server; if the mobile edge computing server does not have the offload capability, the mobile edge computing server can The service acquisition request is sent to the packet core network, the packet core network is sent to the public network, and then sent to the edge application server via the public network, and the edge application server provides the user entity with the service corresponding to the service identifier. For example, if the address of the first application server is IP address 1 and port number 1, and the mobile edge computing server learns that the edge application server has the offload capability by querying Table 2, the mobile edge computing server can directly send the service acquisition request to the edge application server .

Table 2

IP address/port number Whether it has the ability to divert IP address 1/Port number 1 Yes IP address 2/Port number 2 no

For the scenario where the mobile edge computing server is not deployed in the uplink of the user entity, when receiving the IP address of the cloud application server, the user entity can send a service acquisition request to the cloud application server corresponding to the cloud application server IP address, and the service acquisition request is sent to the cloud application server via the user entity. The base station is then sent to the packet core network, and then sent to the public network by the packet core network, and sent to the cloud application server via the public network, and then the cloud application server provides the user entity with the service corresponding to the service identifier.

In another implementation of the present disclosure, after the user entity successfully communicates with the first application server (cloud application server or edge application server), the user entity will also send a first notification message to the control server, where the first notification message includes the user Entity ID, service ID and address of the first application server, etc. When receiving the first notification message sent by the user entity, the control server will store the correspondence between the user entity ID, service ID and the address of the first application server, and send it to the user. The entity sends a confirmation message, and the corresponding relationship can be used to monitor the service of the user entity subsequently.

FIG. 4 shows a process of establishing a network connection provided by an embodiment of the present disclosure in a V2X scenario, and the process is as follows:

1. The V2X UE sends a V2X AS query request to the V2X CF, and the V2X AS query request includes the location information of the V2X UE and the V2X Service identifier; if the V2X UE is deployed with MEC in the uplink, go to step 2; if the V2X UE is deployed in the uplink without MEC, go to step 10;

2. In the scenario where the MEC is deployed upstream of the V2X UE, the MEC intercepts the V2X AS query request, adds the MEC IP address to the V2X AS query request, and sends the V2X AS query request to the V2X CF;

3. The V2X CF queries the domain name and port number of the Edge V2X AS, and sends the domain name and port number of the Edge V2X AS to the MEC;

4. The MEC sends the domain name and port number of the Edge V2X AS to the V2X UE;

5. The V2X UE sends a domain name query request to the DNS, and the domain name query request includes the domain name of the Edge V2X AS;

6. DNS queries the IP address of the Edge V2X AS corresponding to the domain name of the Edge V2X AS, and sends the IP address of the Edge V2X AS to the V2X UE;

7. If the V2X UE needs two V2X services, namely V2X Service1 and V2X Service2, after steps 1 to 3 above determine that V2X Service1 is provided by Edge V2X AS and V2X Service2 is provided by Cloud V2X AS, then V2X can provide Edge V2X AS. V2X AS sends a service acquisition request carrying the V2X Service1 identifier, and sends a service acquisition request carrying the V2X Service2 identifier to Cloud V2XAS;

8. The MEC intercepts the service acquisition request sent to the Edge V2X AS. If the MEC has the offload capability, the MEC sends the service acquisition request to the Edge V2X AS; if the MEC does not have the offload capability, the MEC sends the service acquisition request to the packet Core network, sent from the packet core network to the public network, and sent to the Edge V2X AS via the public network;

9. The MEC will not intercept the service acquisition request sent to Cloud V2X AS, but will directly send it to the packet core network, which will then be sent to the public network, and then sent to the Edge V2X AS via the public network;

10. In the scenario where the MEC is not deployed on the V2X UE uplink, the V2X UE sends a V2X AS acquisition request to the Cloud V2X AS, and after establishing a network connection with the Cloud V2X AS, it sends a service acquisition request to the Cloud V2X AS, and the Cloud V2X AS sends a service acquisition request. provide services to it;

11. After the V2X UE successfully communicates with the Edge V2X AS or Cloud V2X AS, the V2X UE sends a notification message to the V2X CF, and the notification message includes the correspondence between the V2X UE identifier, the V2X Service identifier, and the V2X AS address;

12. After storing the correspondence between the V2X UE identifier, the V2X Service identifier, and the V2X AS address, the V2X CF sends a confirmation message to the V2X UE.

In the method provided by the embodiment of the present disclosure, when a user entity initiates a service query request, the user entity adds its own location information to the service query request, so that the control server can query an appropriate application for the user entity according to the location information of the user entity The server can quickly obtain the required service, thereby improving the speed of obtaining the service and the quality of the service.

Based on the architecture diagram of the system for establishing a network connection shown in FIG. 1 , an embodiment of the present disclosure provides a method for establishing a network connection. Referring to FIG. 5 , the flow of the method provided by the embodiment of the present disclosure includes:

501. When detecting that the service corresponding to the service identifier provided by the first application server is unavailable, the control server acquires the address of the second application server that can provide the available service, and sends a service address change message to the user entity.

In the embodiment of the present disclosure, the control server maintains a service status table, and the service status table may store the correspondence between the service identifier, the address of the application server, and the service availability status, and may also store the user entity identifier and the user entity ID. Correspondence between the location information and the above information. For the specific form of the service status table, see Table 3.

table 3

The service status table can be maintained in the following two ways:

In the first manner, the application server periodically sends a status report for maintaining the heartbeat to the control server, and the control server determines the service availability status of all services provided by the application server according to whether the status report is received or not. Specifically, for the edge application server, the edge application server periodically sends a status report of maintaining the heartbeat to the mobile edge computing server, and the status report includes the address of the edge application server, which is sent by the mobile edge computing server to the control server. If the control server does not receive status report, it is determined that all services provided by the edge application server corresponding to the edge application server address are unavailable, and then the service availability status of all services provided by the edge application server in the service status table is changed to unavailable; for cloud applications The server, the cloud application server can periodically send the status report of maintaining the heartbeat to the control server. If the control server does not receive the status report, it is determined that all services provided by the cloud application server are unavailable, and then all the services provided by the cloud application server are unavailable. The service's service available status in the service status table changes to unavailable.

In the second manner, the application server periodically sends a status report for maintaining the heartbeat of a specific service to the control server, and the control server determines the service availability status of the specific service provided by the application server according to whether the status report is received or not. Specifically, for the edge application server, the edge application server periodically sends a status report for maintaining the heartbeat of a specific service to the mobile edge computing server. The status report includes the address of the edge application server and the specific service identifier, and is sent by the mobile edge computing server to the control If the control server does not receive the status report, it determines that the specific service provided by the edge application server is unavailable, and then changes the available status of the specific service provided by the edge application server in the service status table to unavailable; for the cloud application server , the cloud application server can periodically send a status report for maintaining the heartbeat of a specific service to the control server. If the control server does not receive the status report, it is determined that the specific service provided by the cloud application server is unavailable, and then the cloud application server provides The availability status of a specific service in the service status table changes to unavailable.

Based on the maintained status report, when it is detected that the service corresponding to the service identifier provided by the first application server is unavailable, the control server obtains the address of the second application server that can provide the available service, and then sends a service address change message to the user entity. The address change message includes the second application server address and the like.

The method for the control server to obtain the address of the second application server that can provide available services is as follows:

In the first step, the control server queries whether there are other edge application service addresses that can provide available services in the service status table according to the service identifier;

In the second step, if it exists, the control server uses the address of other edge services as the address of the second application server; if it does not exist, the IP address of the cloud application server is used as the address of the second application server.

502. After receiving the service address change message sent by the control server, the user entity establishes a network connection with the second application server.

When receiving the service address change message sent by the control server, the user entity establishes a network connection with the second application server by sending a service acquisition request to the second application server corresponding to the address of the second application server. After the user entity successfully communicates with the second application server, the user entity will also send a second notification message to the control server, where the second notification message includes the user entity identifier, the service identifier and the address of the second application server. When notifying the message, the control server stores the corresponding relationship between the user entity identifier, the service identifier and the address of the second application server, and returns a confirmation message to the user entity, and the corresponding relationship can be used for subsequent monitoring of the user entity's services.

FIG. 6 shows a process of establishing a network connection provided by an embodiment of the present disclosure in a V2X scenario, and the process is as follows:

1. In the V2X scenario, the Edge V2X AS1 periodically sends a status report to the MEC. The status report includes the Edge V2X AS1 address, etc., and the Edge V2X AS2 can also periodically send a status report to the MEC. The status report includes the Edge V2X AS2 address, etc.; if it receives the status report sent by Edge V2X AS1, MEC will send the received status report to V2X CF, V2X CF will receive the status report forwarded by MEC, and put the services provided by Edge V2X AS1 in the service status table. Set to the available state. If the V2X CF does not receive the status report of the Edge V2X AS1 within the preset time period, the service provided by the Edge V2X AS1 is set to the unavailable state in the service status table; MEC maintains the Edge V2XAS2 to provide services The availability status of the Edge V2X AS1 is the same as the maintenance process for maintaining the availability status of the services provided by the Edge V2X AS1. For details, please refer to the maintenance process of the Edge V2X AS1, which will not be repeated here;

3. When the V2X CF detects that the V2X service provided by the Edge V2X AS1 to the V2X UE is unavailable, the V2X CF can obtain the Edge V2X AS2 address that can provide the V2X available service according to the service status table, and send the Edge V2X AS2 address to the V2X UE. ;

4. When receiving the Edge V2X AS2 address, the V2X UE establishes a network connection with the Edge V2X AS2;

5. When the V2X UE communicates with the Edge V2X AS2 successfully, the V2X UE sends a notification message to the V2X CF. When the notification message is received, the V2X CF stores the correspondence between the V2X UE ID, the service ID and the Edge V2X AS2 address, and sends the notification message to the V2X UE. The V2X UE sends a confirmation message.

In the process of switching from the first application server to the second application server, the problem of data synchronization is also involved between the first application server and the second application server. For the specific data synchronization process, refer to the embodiment shown in FIG. 7 .

In the method provided by the embodiments of the present disclosure, in the service provision process, when it is detected that the application server is unavailable, the application server that provides the service is replaced for the user entity, thereby ensuring the continuity of the service.

Based on the architecture diagram of the system for establishing a network connection shown in FIG. 1 , an embodiment of the present disclosure provides a method for establishing a network connection. Referring to FIG. 7 , the flow of the method provided by the embodiment of the present disclosure includes:

701. When the location information change is detected, the user entity sends a second service query request to the control server.

In the process of obtaining the service from the first application server, when the user entity detects that the tracking cell identity changes, the Cell-ID changes, or the E-SMLC positioning changes exceed a certain threshold, it can determine the location information changes, and then send the second information to the control server. A service query request, the second service query request includes the updated location information of the user entity, the service identifier, and the like. If a mobile edge computing server is deployed on the uplink of the user entity, the mobile edge computing server can intercept the second service query request and send the second service query request to the control server; if the uplink of the user entity is not deployed with a mobile edge If the computing server is used, the user entity can directly send the second service query request to the control server.

702. When receiving the second service query request from the user entity, the control server obtains the address of the third application server according to the updated location information and the service identifier of the user entity, and sends a data synchronization request to the first application server.

When receiving the second service query request of the user entity, the control server determines the third application service address of the third application server to be accessed according to the updated location information, the driving track of the user entity and the current road conditions. The control server sends a data synchronization request to the first application server, where the data synchronization request includes a user entity identifier, a service identifier, a third application server identifier, a third application server address, and the like, and the data synchronization request is used to trigger the first application server and the third application server. The application server performs data synchronization. Data synchronization between the first application server and the third application server includes but is not limited to the following scenarios:

In the first scenario, the first application server is a cloud application server, the third application server is an edge application server, and the data synchronization process is that the cloud server synchronizes the stored interaction data with the user entity to the edge to be accessed by the user entity The process of applying the server.

In the second scenario, the first application server is an edge application server, the third application server is a cloud application server, and the data synchronization process is that the edge application server synchronizes the stored interaction data with the user entity to the user entity to be accessed. The process of cloud application server.

In the third scenario, the first application server is an edge application server, the third application server is another edge application server, and the data synchronization process is that an edge application server synchronizes the stored interaction data with the user entity to the user entity The process of another edge application server to be accessed.

When receiving the data synchronization request, the first application server initiates a data pre-synchronization request to the third application server corresponding to the address of the third application server, where the data pre-synchronization request includes the user entity identifier, the service identifier, and the data to be synchronized. After the data synchronization is completed, the first application server sends a data synchronization response to the control server, where the data synchronization response includes the user entity identifier, the service identifier, the third application server identifier, and the like.

703. When receiving the data synchronization response from the first application server, the control server sends the address of the third application server to the user entity.

When receiving the data synchronization response from the first application server, the control server sends the address of the third application server to the user entity, so as to trigger the user entity to establish a network connection with the third application server. If the first application server is an edge application server, the third application server is another edge application server, and the first application server and the third application server are located on different mobile edge computing After the data synchronization response, the control server detects whether the user entity is connected to the platform of the mobile edge computing server corresponding to the third application server. If the user entity is connected to the platform of the mobile edge computing server corresponding to the third application server, it will The address of the third application server is sent to the user entity; if the user entity is not connected to the platform of the mobile edge computing server corresponding to the third application server, the address of the first application server is sent to the user entity, and the first application server and the third application server are kept. The data synchronization status between the three application servers.

704. After receiving the third application server address, the user entity establishes a network connection with the third application server corresponding to the third application server address.

When receiving the third application server address, the user entity establishes a network connection with the third application server corresponding to the third application service address according to the third application server address. Specifically, if the received third application server address is the domain name and port number of the edge application server, the user entity will send a domain name query request to the domain name query system to query the IP address of the edge application server corresponding to the domain name of the edge application server , and then establish a network connection with the third application server through the IP address and port number of the edge application server obtained.

In another implementation of the present disclosure, after the user entity successfully communicates with the third application server, it will also send a third notification message to the control server, where the third notification message includes the user entity identifier, the service identifier, and the address of the third application server, etc. , when receiving the third notification message, the control server stores the correspondence between the user entity identifier, the service identifier and the address of the third application server.

FIG. 8 shows a process of establishing a network connection provided by an embodiment of the present disclosure in a V2X scenario, and the process is as follows:

1. During the process of the V2X UE obtaining the service from the Edge V2X AS1, when the V2X UE detects a location update, the V2X UE sends a V2X AS query request to the V2X CF, and the V2X AS query request includes the updated location information of the V2X UE and the V2XService identifier;

2. The V2X CF determines the Edge V2X AS2 corresponding to the MEC to be accessed, and sends a data synchronization request to the Edge V2X AS1. The data synchronization request includes the V2X UE identifier, the V2X Service identifier, and the Edge V2X AS2 identifier, etc.;

3. When receiving a data synchronization request, Edge V2X AS1 initiates a data pre-synchronization request to Edge V2X AS2. The data pre-synchronization request includes the V2X UE ID, V2X Service ID, and data to be synchronized, etc. Edge V2X AS1 communicates with Edge V2X AS2. Interact to achieve data synchronization;

4. After the data synchronization is completed, the Edge V2X AS1 sends a data synchronization response to the V2X CF, and the data synchronization response includes the V2X UE identifier, the V2X Service identifier, and the Edge V2X AS2 identifier, etc.;

5. When it is detected that the V2X UE is connected to the MEC platform where the Edge V2X AS2 is located, the Edge V2X AS2 domain name and port number are sent to the V2X UE; when it is detected that the V2X UE is still connected to the MEC platform where the Edge V2X AS1 is located, the The EdgeV2X AS1 domain name and port number are sent to the V2X UE, and the data synchronization state between Edge V2X AS1 and Edge V2X AS2 is maintained;

6. The V2X UE sends a domain name query request to DNS to obtain the Edge V2XAS2 IP address corresponding to the Edge V2X AS2 domain name;

7. The V2X UE initiates a network connection with the Edge V2X AS2 based on the Edge V2X AS2 IP address and port number;

8. After the V2X UE successfully communicates with the Edge V2X AS2, the V2X UE sends a notification message to the V2X CF to notify the V2X CF to store the correspondence between the V2X Service ID, the Edge V2X AS2 IP address, and the port number.

In the method provided by the embodiments of the present disclosure, when the user entity needs to be switched to a new application server for location update, data synchronization is performed between the two application servers before and after the switch, so as to avoid service unavailability after the switch and improve service quality.

An embodiment of the present disclosure provides a user entity. Referring to FIG. 9 , the user entity includes: a sending unit 901 and a receiving unit 902 .

Wherein, the sending unit 901 is configured to perform step 301 in FIG. 3 and step 701 in FIG. 7 ;

The receiving unit 902 is configured to execute step 303 in FIG. 3 , step 502 in FIG. 5 and step 704 in FIG. 7 .

An embodiment of the present disclosure provides a control server. Referring to FIG. 10 , the control server includes: a receiving unit 1001 , a querying unit 1002 and a sending unit 1003 .

The receiving unit 1001 is configured to perform step 302 in FIG. 3 and steps 702 and 703 in FIG. 7 ;

The query unit 1002 is configured to execute step 302 in FIG. 3;

The sending unit 1003 is configured to execute step 501 in FIG. 5 .

An embodiment of the present disclosure provides a mobile edge computing server. Referring to FIG. 11 , the mobile edge computing server includes: a receiving unit 1101 , an address adding unit 1102 , and a sending unit 1103 .

The receiving unit 1101, the address adding unit 1102, and the sending unit 1103 are used to implement the process between steps 301 and 302 in FIG. 3 .

It should be noted that: when the user entity, the control server and the mobile edge computing server provided in the above-mentioned embodiments establish a network connection, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the method embodiments for establishing a user entity, a control server, a mobile edge computing server and a network connection provided by the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, etc.

The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection of the present disclosure. within the range.

Claims (37)

1. A method for establishing a network connection, wherein the method comprises: Sending a first service query request to the control server, where the first service query request includes the location information and service identifier of the user entity, and the first service query request is used by the control server according to the location information and service identifier of the user entity identifying, querying the address of the first application server, and sending the address of the first application server to the user entity; Receive the first application server address, and send a service acquisition request to the first application server corresponding to the first application server address, where the service acquisition request includes a user entity identifier and a service identifier, and the service acquisition request is used for all The first application server provides the service corresponding to the service identifier to the user entity corresponding to the user entity identifier. 2. The method according to claim 1, wherein the first application server address comprises an edge application server domain name and port number, and the first application server corresponding to the first application server address is sent to obtain a service Before the request, also include: Send a domain name query request to the domain name system, where the domain name query request includes the edge application server domain name, and the domain name query request is used by the domain name system to query the network interconnection protocol IP of the edge application server corresponding to the edge application server domain name address, and send the IP address of the edge application server to the user entity; The sending a service acquisition request to the first application server corresponding to the first application server address includes: The service acquisition request is sent to the edge application server corresponding to the IP address of the edge application server and the port number. 3. The method according to claim 1, wherein the first application server address comprises an IP address of a cloud application server, and the first application server address corresponding to the first application server address Send a service acquisition request, including: The service acquisition request is sent to the cloud application server corresponding to the IP address of the cloud application server. 4. The method according to any one of claims 1 to 3, wherein the method further comprises: When the service corresponding to the service identifier is acquired, a first notification message is sent to the control server, where the first notification message includes the user entity identifier, the service identifier and the address of the first application server, the first notification message A notification message is used for the control server to store the correspondence between the user entity identifier, the service identifier and the address of the first application server. 5. The method according to claim 4, wherein the method further comprises: Receive a service address change message sent by the control server, where the service address change message includes the address of the second application server, and the service address change message is for the control server to detect the service identifier provided by the first application server Sent when the corresponding service is unavailable, and the second application server corresponding to the second application server address is used to provide the service corresponding to the service identifier; A network connection is established with the second application server. 6. The method according to claim 4, wherein the method further comprises: When a change in the location information is detected, a second service query request is sent to the control server, where the second service query request includes the updated location information of the user entity and the service identifier, and the second service query request The request is for the control server to query the address of the third application server, trigger the first application server and the third application server corresponding to the address of the third application server to perform data synchronization, and send the address of the third application server to the user entity; The third application server address is received, and a network connection is established to the third application server corresponding to the third application server address. 7. A method for establishing a network connection, wherein the method comprises: receiving a first service query request from a user entity, where the first service query request includes location information and a service identifier of the user entity; According to the location information of the user entity and the service identifier, query a first application server address, and send the first application server address to the user entity, where the first application server address is used for the user entity A service acquisition request is sent to the first application server, where the service acquisition request includes a user entity identifier and a service identifier. 8. The method according to claim 7, wherein the first service query request further comprises the mobile edge computing server address of the mobile edge computing server located in the uplink of the user entity; The querying the address of the first application server according to the location information of the user entity and the service identifier includes: According to the location information, the mobile edge computing server address and the service identifier, query the domain name and port number of the edge application server, and use the domain name and port number of the edge application server as the first application server address. 9. The method according to claim 7, wherein the querying the address of the first application server according to the location information of the user entity and the service identifier comprises: According to the location information of the user entity and the service identifier, query the IP address of the cloud application server for the network interconnection protocol, and use the IP address of the cloud application server as the first application server address. 10. The method according to any one of claims 7 to 9, wherein the method further comprises: receiving a first notification message sent by the user entity, where the first notification message includes the user entity identifier, the service identifier, and the first application server address; The correspondence between the user entity identifier, the service identifier and the address of the first application server is stored. 11. The method of claim 10, wherein the method further comprises: When it is detected that the service corresponding to the service identifier provided by the first application server is unavailable, the address of a second application server capable of providing an available service is obtained, and a service address change message is sent to the user entity, and the service address is changed The message includes the second application server address, and the service address change message is used for the user entity to establish a network connection with the second application server corresponding to the second application server address. 12. The method according to claim 11, wherein the acquiring the address of the second application server capable of providing available services comprises: According to the service identifier, query whether there are other edge application service addresses that can provide available services in the service status table, where the service status table stores the correspondence between the service identifier, the application server address and the service availability status; If it exists, use other edge service addresses as the second application server address; If it does not exist, the IP address of the cloud application server is used as the second application server address. 13 . The method according to claim 12 , wherein, before querying, according to the service identifier, whether there are other edge service addresses capable of providing available services in the service status table, the method further comprises: 13 . receiving a status report sent by the mobile edge computing server and the cloud application server, where the status report includes the address of the application server; Based on the status report, the service status table is maintained. 14. The method of claim 10, wherein the method further comprises: Receive a second service query request from the user entity, where the second service query request includes the updated location information of the user entity and the service identifier, and the second service query request is detected by the user entity. Sent when the location information changes; Obtain the address of a third application server according to the updated location information of the user entity and the service identifier, and send a data synchronization request to the first application server, where the data synchronization request includes the user entity identifier, the service identifier and the address of the third application server, the data synchronization request is used for the first application server to synchronize data with the third application server corresponding to the address of the third application server, and to the control server after the data synchronization is completed Send data synchronization response; When receiving the data synchronization response, the third application server address is sent to the user entity, where the third application server address is used for the user entity to establish a network connection with the third application server. 15. A method for establishing a network connection, wherein the method comprises: receiving a first service query request sent by a user entity, where the first service query request includes location information and a service identifier of the user entity; Add the mobile edge computing server address to the first service query request, and send the first service query request including the mobile edge computing server address to the control server, and the first service query request including the mobile edge computing server address. A service query request is used for the control server to query the domain name and port number of the edge application server according to the location information of the user entity, the service identifier and the address of the mobile edge computing server, and to compare the domain name and port number of the edge application server with The port number is sent to the user entity, and the edge application server domain name and port number are used for the user entity to establish a network connection with the edge application server. 16. The method according to claim 15, wherein after the sending the first service query request including the mobile edge computing server address to the control server, the method further comprises: receiving a service acquisition request sent by the user entity, where the service acquisition request includes a user entity identifier and the service identifier; Sending the service acquisition request to the edge application server, where the service acquisition request is used by the edge application server to provide the service corresponding to the service identifier to the user entity corresponding to the user entity identifier. 17. The method of claim 15, wherein the method further comprises: receiving a status report sent by each edge application server, where the status report includes the address of the edge application server; The status report is sent to the control server, and the status report is used for the control server to maintain a service status table, where the service status table stores the correspondence between service identifiers, application server addresses, and available statuses. 18. A user entity, characterized in that the user entity comprises: A sending unit, configured to send a first service query request to the control server, where the first service query request includes the location information and service identifier of the user entity, and the first service query request is used by the control server according to the user entity location information and service identifier, query the address of the first application server, and send the address of the first application server to the user entity; a receiving unit, configured to receive the address of the first application server; The sending unit is further configured to send a service acquisition request to the first application server corresponding to the first application server address, where the service acquisition request includes a user entity identifier and a service identifier, and the service acquisition request is used for the first application server. An application server provides the service corresponding to the service identifier to the user entity corresponding to the user entity identifier. 19. The user entity according to claim 18, wherein the first application server address comprises an edge application server domain name and a port number, and the sending unit is further configured to send a domain name query request to a domain name system, the The domain name query request includes the domain name of the edge application server, and the domain name query request is used for the domain name system to query the IP address of the edge application server corresponding to the domain name of the edge application server, and to use the edge application server's IP address. sending an IP address to said user entity; The sending unit is further configured to send the service acquisition request to the edge application server corresponding to the IP address of the edge application server and the port number. 20 . The user entity according to claim 18 , wherein the first application server address comprises an IP address of the cloud application server, and the sending unit is further configured to send an IP address to the cloud application server. 21 . The cloud application server corresponding to the IP address sends the service acquisition request. 21. The user entity according to any one of claims 18 to 20, wherein the sending unit is further configured to send a first message to the control server when the service corresponding to the service identifier is acquired a notification message, the first notification message includes the user entity identifier, the service identifier and the first application server address, and the first notification message is used by the control server to store the user entity identifier, the service identifier and the corresponding relationship between the addresses of the first application server. 22. User entity according to claim 21, characterized in that, The receiving unit is configured to receive a service address change message sent by the control server, where the service address change message includes a second application server address, and the service address change message indicates that the control server detects the first application Sent when the service corresponding to the identifier provided by the server is unavailable, and the second application server corresponding to the address of the second application server is used to provide the service corresponding to the service identifier; The user entity further includes: a connection unit, configured to establish a network connection with the second application server. 23. The user entity according to claim 22, wherein the sending unit is further configured to send a second service query request to the control server when a change in the location information is detected, the second The service query request includes the updated location information of the user entity and the service identifier, and the second service query request is used for the control server to query the address of a third application server, triggering the first application server and the third application server. The third application server corresponding to the application server address performs data synchronization, and sends the third application server address to the user entity; The receiving unit is further configured to receive the address of the third application server, and establish a network connection with the third application server corresponding to the address of the third application server. 24. A control server, wherein the control server comprises: a receiving unit, configured to receive a first service query request from a user entity, where the first service query request includes location information and a service identifier of the user entity; a query unit, configured to query the address of the first application server according to the location information of the user entity and the service identifier; A sending unit, configured to send the first application server address to the user entity, where the first application server address is used by the user entity to send a service acquisition request to the first application server, where the service acquisition request includes the user Entity ID and Service ID. 25. The control server according to claim 24, wherein the first service query request further comprises the mobile edge computing server address of the mobile edge computing server located in the uplink of the user entity; The query unit is further configured to query the domain name and port number of the edge application server according to the location information, the address of the mobile edge computing server and the service identifier, and use the domain name and port number of the edge application server as the first An application server address. 26. The control server according to claim 24, wherein the query unit is further configured to query the IP address of the cloud application server according to the location information of the user entity and the service identifier, The IP address of the cloud application server is used as the first application server address. 27. The control server according to any one of claims 24 to 26, wherein the control server further comprises: a receiving unit, configured to receive a first notification message sent by the user entity, where the first notification message includes the user entity identifier, the service identifier, and the first application server address; The storage unit is further configured to store the correspondence between the user entity identifier, the service identifier and the address of the first application server. 28. The control server according to claim 27, wherein the control server further comprises: an acquiring unit, configured to acquire the address of a second application server that can provide an available service when it is detected that the service corresponding to the service identifier provided by the first application server is unavailable; The sending unit is further configured to send a service address change message to the user entity, where the service address change message includes the address of the second application server, and the service address change message is used for the user entity to communicate with the first application server. The second application server corresponding to the two application server addresses establishes a network connection. 29. The control server according to claim 28, wherein the obtaining unit is further configured to query whether there are other edge service addresses capable of providing available services in the service status table according to the service identifier, and the service The state table stores the correspondence between the service identifier, the application server address, and the service availability status; if it exists, other edge service addresses are used as the second application server address; if it does not exist, the cloud application server IP address The address is used as the address of the second application server. 30. The control server according to claim 29, wherein the control server further comprises: The receiving unit is further configured to receive a status report sent by the mobile edge computing server and the cloud application server, where the status report includes the address of the application server; A maintenance unit, configured to maintain the service status table according to the status report. 31. The control server of claim 27, wherein the control server further comprises: The receiving unit is configured to receive a second service query request from the user entity, where the second service query request includes the updated location information of the user entity and the service identifier, and the second service query request is issued by the user entity. Sent when the user entity detects that the location information changes; an obtaining unit, configured to obtain a third application server address according to the updated location information of the user entity and the service identifier, and send a data synchronization request to the first application server, where the data synchronization request includes the user entity identifier, the service identifier, and the address of the third application server, the data synchronization request is used for the first application server to synchronize data with the third application server corresponding to the address of the third application server, and the data synchronization After completion, send a data synchronization response to the control server; The sending unit is further configured to send the third application server address to the user entity when the data synchronization response is received, where the third application server address is used for the user entity to communicate with the third application server. The application server establishes a network connection. 32. A mobile edge computing server, wherein the mobile edge computing server comprises: a receiving unit, configured to receive a first service query request sent by a user entity, where the first service query request includes location information and a service identifier of the user entity; An address adding unit, configured to add the mobile edge computing server address to the first service query request; a sending unit, configured to send a first service query request including the mobile edge computing server address to a control server, where the first service query request including the mobile edge computing server address is used by the control server according to the The location information of the user entity, the service identifier and the address of the mobile edge computing server, query the domain name and port number of the edge application server, and send the domain name and port number of the edge application server to the user entity. The server domain name and port number are used for establishing a network connection between the user entity and the edge application server. 33. The mobile edge computing server according to claim 32, wherein the receiving unit is further configured to receive a service acquisition request sent by the user entity, the service acquisition request comprising a user entity identifier and the service identification; The sending unit is configured to send the service acquisition request to the edge application server, where the service acquisition request is used by the edge application server to provide the service corresponding to the service identifier to the user entity corresponding to the user entity identifier. 34. The mobile edge computing server according to claim 33, wherein the receiving unit is further configured to receive a status report sent by each edge application server, wherein the status report includes the address of the edge application server; The sending unit is further configured to send the status report to the control server, where the status report is used for the control server to maintain a service status table, where the service status table stores service identifiers, application server addresses and Correspondence between available states. 35. A network device, characterized in that the network device comprises a memory, a processor, a transceiver, and a bus, wherein the memory, the processor, and the transceiver are connected to each other through the bus, and the memory is used to store Computer instructions, when the network device runs, the processor executes the computer instructions, so that the network device executes the method for establishing a network connection according to any one of claims 1 to 17 . 36. A computer-readable storage medium, wherein the computer-readable storage medium is used for storing computer software instructions used by the above-mentioned user entity, which comprises a computer-readable storage medium for performing the method described in any one of claims 1 to 17. A program designed for the establishment of a network connection. 37. A system for establishing a network connection, wherein the system for establishing a network connection comprises a user entity, a control server and a mobile edge computing server; The user entity is the user entity according to any one of claims 18 to 23; The control server is the control server according to any one of claims 24 to 31; The mobile edge computing server is the mobile edge computing server according to any one of claims 32 to 34.

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