CN114826808B - User terminal network access method and device, user terminal and storage medium - Google Patents

User terminal network access method and device, user terminal and storage medium Download PDF

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Publication number
CN114826808B
CN114826808B CN202210391934.7A CN202210391934A CN114826808B CN 114826808 B CN114826808 B CN 114826808B CN 202210391934 A CN202210391934 A CN 202210391934A CN 114826808 B CN114826808 B CN 114826808B
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China
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pgw
access point
user terminal
access
accessed
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CN114826808A (en
Inventor
彭锐
麦文胜
姜百淳
刘江
胡广金
张欣
宋鑫
陈彧娴
吴瑞杰
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The application provides a method and a device for accessing a user terminal to a network, the user terminal and a storage medium. The method comprises the following steps: judging whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point; responding to the occurrence of a fault of a first PGW, acquiring a preconfigured second PGW and an access point accessed to the second PGW, wherein the second PGW and the first PGW are preconfigured with different static address pools; the second PGW is a normal PGW; determining a target access point from access points accessed by a second PGW; and accessing the target server by adopting the target access point to realize that the user terminal accesses the virtual packet data network VPDN. According to the method, when the PGW function is in fault, the user terminal can select one target access point from the access points accessed by the second PGW, and the target access point is adopted to access the network, so that user experience can be guaranteed.

Description

User terminal network access method and device, user terminal and storage medium
Technical Field
The present application relates to communications technologies, and in particular, to a method and apparatus for accessing a user terminal to a network, a user terminal, and a storage medium.
Background
For a user terminal accessing a virtual packet data network (Virtual Packet Data Network, VPDN) by using a static address pool, the user terminal accesses a packet data network gateway (Packet Data Network GateWay, PGW) by an access point (Access Point Name, APN), the PGW allocates a static internet protocol address (Internet Protocol Address, IP address) to the user terminal, and provides a bearer service, so as to establish a communication link between the user terminal and a target server. The IP address allocated by the PGW to the user terminal is fixed. Therefore, the ue can only access the network through the fixed PGW and communicate with the target server. Because the number of the PGWs for providing the bearing service for the user terminal accessing the network by the static address pool is 1, when the PGW function fails, the user terminal is disconnected and cannot access the network.
In the prior art, when a PGW fails, only the failure repair can be waited, or the PGW disaster recovery switching is adopted, so that a user served by the PGW is migrated to a standby PGW, and the standby PGW redistributes a static address for a user terminal. However, for a user terminal accessing to the network by using the static address pool, in order to ensure normal communication between the user terminal and the target server, only the PGW can be cold backed up, and when the PGW fails, the standby PGW may not be found. Even if a standby PGW is found, it takes a long time for the user to migrate and reassign the static address, during which time the user terminal cannot access the network.
In summary, in the prior art, for a ue that uses a static address pool to access a virtual packet data network, when PGW functions fail, there is a problem that the ue cannot access the network, which results in a reduced user experience.
Disclosure of Invention
The application provides a method and a device for accessing a user terminal to a network, the user terminal and a storage medium, which are used for solving the problems that in the prior art, the user terminal uses a static address pool to access the user terminal of a virtual packet data network, when the PGW function fails, the user terminal cannot access the network, and the user experience is reduced.
According to a first aspect of the present application, there is provided a method for a user terminal to access a network, comprising:
judging whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point;
responding to the occurrence of a fault of the first PGW, acquiring a second PGW which is preconfigured and an access point which is accessed to the second PGW, wherein the second PGW and the first PGW are preconfigured with different static address pools; the second PGW is a normal PGW;
determining a target access point from the access points accessed by the second PGW;
and accessing the target server by adopting the target access point to realize that the user terminal accesses the virtual packet data network VPDN.
According to a second aspect of the present application, there is provided a user terminal access network apparatus comprising:
the judging module is used for judging whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point;
an obtaining module, configured to obtain a second PGW configured in advance and an access point to which the second PGW is accessed in response to a failure of the first PGW, where the second PGW and the first PGW are configured in advance with different static address pools; the second PGW is a normal PGW;
a determining module, configured to determine a target access point from the access points accessed by the second PGW;
and the access module is used for accessing the target server by adopting the target access point so as to realize that the user terminal accesses the Virtual Packet Data Network (VPDN).
According to a third aspect of the present application, there is provided a user terminal comprising: a memory, a processor, and a transceiver;
the memory, the processor and the transceiver circuit are interconnected;
the memory stores computer-executable instructions;
the transceiver is used for receiving and transmitting data;
the processor executes computer-executable instructions stored by the memory to implement the method as described in the first aspect.
According to a fourth aspect of the present application there is provided a computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method as described in the first aspect.
The method and the device for accessing the user terminal to the network, the user terminal and the storage medium provided by the application judge whether the first packet data network gateway PGW has faults or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point; responding to the occurrence of a fault of the first PGW, acquiring a second PGW which is preconfigured and an access point which is accessed to the second PGW, wherein the second PGW and the first PGW are preconfigured with different static address pools; the second PGW is a normal PGW; determining a target access point from the access points accessed by the second PGW; and accessing the target server by adopting the target access point to realize that the user terminal accesses the virtual packet data network VPDN. Since the second PGW and the first PGW are configured with different static address pools, the target server can determine that the PGW providing the bearer service is the first PGW or the second PGW through the static IP addresses belonging to the different static address pools, and can determine which user terminal the user terminal is in communication with through the addresses of the user terminals in the different static address pools, so that the first PGW and the second PGW can work simultaneously, the second PGW also provides the normal bearer service for the user terminal, and not just serves as a backup of the first PGW, in case of failure of the first PGW, the user terminal can select a target access point from the access points accessed by the second PGW, and then access the network by adopting the target access point. Therefore, for the user terminal accessing the virtual packet data network by using the static address pool, the scheme provided by the application can ensure that the user terminal normally accesses the network when the PGW function fails, thereby ensuring the user experience.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a network architecture diagram corresponding to a method for accessing a user terminal to a network according to an embodiment of the present application;
fig. 2 is a flowchart of a method for accessing a user terminal to a network according to a first embodiment of the present application;
fig. 3 is a flowchart of a method for accessing a user terminal to a network according to a second embodiment of the present application;
fig. 4 is a flowchart of a method for accessing a user terminal to a network according to a third embodiment of the present application;
fig. 5 is a schematic structural diagram of a ue access network device according to a fifth embodiment of the present application;
fig. 6 is a block diagram of a user terminal provided according to a sixth embodiment of the present application.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
The terms involved in the present application will be explained first.
The virtual packet data network, i.e. VPDN, is a data transmission technology, and after a user terminal is inserted into an internet of things card provided by an operator, the user terminal can access an internal network of an enterprise through a wireless network of the operator to access a special target server in the enterprise.
An access point (Access Point Name, APN) is a parameter that a user terminal must configure when accessing a network, is provided to the user terminal by an operator, is used to identify a packet data network (Packet Data Network, PDN) that the user terminal wants to access, and is a packet data network gateway that establishes a packet data connection (Packet data network Connection, PDN connection) for the user terminal. The user terminal can access different packet data networks through different APNs. For example, the user terminal can access the public network through a public APN with a domain name of 3gnet, and can access the enterprise internal network through a private APN.
A packet data network Gateway, i.e. Packet data network Gateway, PDN Gateway, PGW, is an essential device in the communication process between a user terminal and a destination server, for accessing the user terminal to a packet data network (or, in other words, establishing a communication link between the user terminal and the destination server, establishing a packet data connection, etc.), and providing session management and bearer control, data forwarding, IP address allocation, etc. for the user. The PGW corresponds to the APN, the APN is accessed to the PGW, one PGW can be accessed to a plurality of APNs, the PGW accessed by the APN is a packet data network gateway of a packet data network identified by the APN, when the user terminal adopts the APN to access the network, the PGW accessed by the APN is accessed first, and then the PGW accesses the user terminal into the packet data network.
The bearer service refers to a simple information transmission service, which transmits information from one place to another place without any processing.
The prior art to which the present application relates is described in detail and analyzed as follows.
The user terminal marks the packet data network which needs to be accessed by the user terminal through the access point name, after the user terminal accesses the PGW, the PGW distributes an IP address for the user terminal, and determines the packet data network which needs to be accessed by the user terminal according to the access point name, and meanwhile, a communication link between the user terminal and the target server is established, and service bearing is provided, so that the user terminal can access the network to communicate with the target server. The PGW may allocate a static address and a dynamic address to the ue, and the PGW using the static address pool always allocates a fixed IP address to the ue after the ue accesses the network, so as to ensure that the target server can determine which ue is in communication with the target server according to the IP address. The user terminals using the static address pool are mostly internet of things terminals, and the internet of things terminals are communicated with a special target server in a user enterprise through an operator network after being inserted into an internet of things card provided by the operator.
For a user accessing a virtual packet data network by using a static address pool, in order to ensure normal communication between a user terminal and a target server, the number of PGWs for providing address allocation and bearing services for the user terminal is 1, and single-point hidden danger exists. Namely, when the PGW fails, only the failure repair can be performed, or the PGW disaster recovery switching is adopted, so that the user served by the PGW is migrated to the standby PGW. That is, once the PGW fails, the PGW can only wait for the completion of switching or the repair of the failure, and the fast and stable disaster recovery means is lacking.
For a user terminal using a static address pool to access a network, only a cold backup can be performed on the PGW to ensure normal communication between the user terminal and a target server, because the PGW determines the target server to which the user terminal needs to access through an APN, and provides a static IP address for the user terminal, and the target server determines the user terminal to which the user terminal communicates through the static IP address, so if the standby PGW and the primary PGW have the same configuration, i.e., provide the same static IP address for the user terminal, the primary PGW and the standby PGW have the same address pool route, the user terminal can access the target server through any PGW, but when the target server sends information to the user terminal, the target server cannot determine whether a communication link is established by the standby PGW or the primary PGW, i.e., a router between the target server and the PGW cannot determine whether data sent by the target server is to the primary PGW or the standby PGW according to the IP address of the user terminal, at this time, once the router sends the data to the wrong PGW, and the user terminal cannot receive the data sent by the target server. Therefore, in the prior art, in order to avoid the above situation, only the PGW is cold backed up.
When the PGW fails, a backup PGW for cold backup may not be found, and disaster recovery switching may not be implemented. Even if the standby PGW is found, the user migration and the connection of the new link take about two hours in total, during which time the user terminal cannot access the network, and this time is very long for the user, resulting in a reduced user experience. And when the fault is recovered and needs to be migrated back, extra time is needed, and the user can get off line and reconnect, so that the user can perceive the network disconnection phenomenon, and the user experience is reduced again.
In summary, in the prior art, for a ue that uses a static address pool to access a virtual packet data network, when PGW functions fail, there is a problem that the ue cannot access the network, which results in a reduced user experience.
Therefore, in facing the problems in the prior art, the inventors found through creative studies that the technical solution of the present application was proposed in order to solve the above problems of the prior art. In order to ensure that the user terminal can access the network when the first PGW fails, a standby second PGW needs to be provided for the user terminal, and meanwhile, the standby second PGW cannot be cold backed up, and normal communication between the user terminal and the server cannot be affected. Therefore, the inventors propose: judging whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point; responding to the occurrence of a fault of a first PGW, acquiring a preconfigured second PGW and an access point accessed to the second PGW, wherein the second PGW and the first PGW are preconfigured with different static address pools; the second PGW is a normal PGW; determining a target access point from access points accessed by a second PGW; and accessing the target server by adopting the target access point to realize that the user terminal accesses the virtual packet data network VPDN. Since the second PGW and the first PGW are configured with different static address pools, the target server can determine that the PGW providing the bearer service is the first PGW or the second PGW through the static IP addresses belonging to the different static address pools, and can determine which user terminal the user terminal communicates with through the addresses of the user terminals in the different static address pools, so that the first PGW and the second PGW can work simultaneously, the second PGW also provides the normal bearer service for the user terminal, and not just serves as a backup of the first PGW, and in case of failure of the first PGW, the user terminal can select a target access point from the second PGW, and then access the network by adopting the target access point. Therefore, for the user terminal accessing the virtual packet data network by using the static address pool, the user terminal accessing network method, the user terminal and the storage medium provided by the application can ensure that the user terminal normally accesses the network when the PGW function fails, thereby ensuring the user experience.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
The network architecture and application scenario of the method for accessing the user terminal to the network provided by the embodiment of the application will be described below. When the following description refers to the accompanying drawings, the same data in different drawings represents the same or similar elements, unless otherwise indicated.
As shown in fig. 1, a network architecture corresponding to an application scenario provided by an embodiment of the present application includes: at least one user terminal 10, at least two PGWs: a first PGW11 and a second PGW12, the first PGW11 accessing at least one APN, the second PGW12 accessing at least one access point, a target server 13.
The ue 10 is preconfigured with at least two PGWs, a first PGW11 and a second PGW12, a first APN141, a second APN142, a third APN143, a fourth APN144, and a fifth APN145, wherein the first APN141 and the second APN142 access the first PGW11, and the third APN143, the fourth APN144, and the fifth APN145 access the second PGW12. The ue 10 may access the first PGW11 by using the first APN141 or the second APN142 and then access the target server 13, or may access the second PGW12 by using the third APN143, the fourth APN144 or the fifth APN145 and then access the target server 13. The user terminal 10 may sequentially pass through the access network element and the core network element by using the APN to access the PGW.
When the user terminal 10 needs to access the virtual packet data network VPDN to communicate with the target server 13, the user terminal 10 determines whether the first PGW11 fails; when the first PGW11 is not in fault, the first PGW is connected with a user terminal through a history access point; in response to a failure of the first PGW, acquiring a second PGW12 configured in advance and an access point to which the second PGW12 is accessed, where the second PGW12 and the first PGW11 are configured with different static address pools in advance; the second PGW12 is a normal PGW; determining a target access point from the access points accessed by the second PGW 12; and accessing the target server by adopting the target access point to realize the access of the user terminal to the VPDN.
The first PGW11 and the second PGW12 are preconfigured with different static address pools, and for multiple accesses of the same ue 10, a fixed IP address can be allocated to the same ue, and a communication link between the ue 10 and the target server 13 is established, so as to implement the access of the ue 10 to the virtual packet data network VPDN. When the PGW forwards the data sent from the user terminal 10 to the target server 13, the PGW may send the data to the router, and the router forwards the data to the target server.
The destination server 13 is able to determine which user terminal the user terminal accessing the VPDN communicates with, in particular, by means of the IP address used by the user terminal 10 to access the VPDN. When the target server 13 sends data to the user terminal 10, the data may be sent to a router, the router forwards the data to a PGW to which the user terminal 10 accesses, and the PGW sends the data to the user terminal 10.
The network architecture shown in fig. 1 may be applicable to different network systems, for example, a global system for mobile communications (Global System of Mobile communication, abbreviated as GSM), code Division multiple access (Code Division Multiple Access, abbreviated as CDMA), wideband code Division multiple access (Wideband Code Division Multiple Access, abbreviated as WCDMA), time Division-Synchronous Code Division Multiple Access, abbreviated as TD-SCDMA), long term evolution (Long Term Evolution, abbreviated as LTE) system, and future 5G network systems. Alternatively, the communication system may be a system in a scenario of high reliability low latency communication (URLLC) transmission in a 5G communication system.
The user terminal may be a wireless terminal or a wired terminal. A wireless terminal may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. The wireless terminal may communicate with one or more core network devices via a radio access network (Radio Access Network, RAN for short), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, for example, portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. For another example, the wireless terminal may be a personal communication service (Personal Communication Service, abbreviated PCS) phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, abbreviated SIP) phone, a wireless local loop (Wireless Local Loop, abbreviated WLL) station, a personal digital assistant (Personal Digital Assistant, abbreviated PDA) or the like. A wireless Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), mobile Station (Mobile), remote Station (Remote Station), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Agent (User Agent), user equipment (User Device or User Equipment), without limitation herein. Optionally, the user terminal device may also be a device such as a smart watch or a tablet computer.
Embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described in the examples below do not represent all embodiments consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
Example 1
Fig. 2 is a flowchart of a method for accessing a network by a user terminal according to a first embodiment of the present application, and as shown in fig. 2, an execution subject of the present application is a user terminal access network device, where the user terminal access network device is located in a user terminal. The present embodiment provides steps 201 to 204.
Step 201, judging whether the first packet data network gateway PGW has a fault; and when the first PGW is not in failure, the first PGW is connected with the user terminal through the history access point.
In this embodiment, when the first PGW is not faulty, the ue may access the first PGW through the access point, for example, establish a connection with an access network element or a core network element where the access point is located, and communicate with the first PGW through the access network element or the core network element to access the first PGW, and then the first PGW allocates an IP address to the ue, and accesses the ue to the VPDN where the target server is located. When the PGW fails, packet data connection between the user terminal and the VPDN where the target server is located cannot be established, and thus the user terminal cannot access the virtual packet data network VPDN. The user terminal may be preconfigured with at least one access point for identifying the VPDN and the PGW for establishing the packet data connection when accessing the VPDN. The history access point is the access point used when the user terminal successfully accesses the VPDN last time. The first packet data network gateway PGW is a PGW accessed by the history access point. The history access point may be stored in a memory of the user terminal from which the user terminal may directly retrieve the history access point.
In this embodiment, if the number of access points to which the first PGW preconfigured by the ue is one, the one access point is a history access point, and the ue may access the first PGW by using the history access point and send test information to the target server. If the number of access points to which the first PGW is preconfigured by the user terminal is a plurality of, the user terminal may access the first PGW by using any one access point, and send test information to the target server. The test information is used for indicating the target server to send acknowledgement receiving information to the user terminal after receiving the test information. After the user terminal sends the test information to the target server, the user terminal does not receive the acknowledgement receipt information sent by the target server within a preset time period, and then it can be determined that the first PGW fails, that is, the first PGW cannot access the VPDN. In this embodiment, whether the first PGW fails may also be determined by other methods, for example, each ue may be located in a local area network, after any one ue determines that the first PGW fails, a message about whether the first PGW fails may be issued in real time or updated in real time in the local area network, and the other ues may obtain the message about whether the first PGW fails from the local area network to determine whether the first PGW fails. The method for determining whether the first PGW is faulty is not limited in this embodiment.
Step 202, in response to a failure of a first PGW, acquiring a second PGW configured in advance and an access point to which the second PGW is connected, where the second PGW and the first PGW are configured in advance with different static address pools; the second PGW is a normal PGW.
In this embodiment, the access point to which the second PGW is accessed is configured to identify the VPDN and the second PGW for establishing the packet data connection when accessing the VPDN. The number of access points accessed by the second PGW is at least one. When the user terminal accesses the second PGW through the access point accessed by the second PGW, the second PGW allocates an address to the user terminal according to the static address pool pre-configured by the second PGW, and communicates the user terminal with the target server in the VPDN. The second PGW and the first PGW are preconfigured with different static address pools, that is, the same ue has different static IP addresses when accessing the VPDN through the first PGW and accessing the VPDN through the second PGW. For the same user terminal, whether it accesses the target server through the first PGW or the second PGW, the IP address is fixed when it accesses the target server through the first PGW, and the IP address is different from the address when it accesses through the first PGW but is also fixed when it accesses the target server through the second PGW, so that the target server can determine which user terminal the user terminal communicating with can be through the IP address of the user terminal. In addition, because the IP addresses used when the user terminal accesses the target server through the first PGW and the second PGW belong to different static address pools and are two different IP addresses, the target server will not send data to the wrong PGW when sending the data to the user terminal. In addition, in the actual use process, the probability of the simultaneous occurrence of the first PGW and the second PGW is smaller, and when the first PGW is in failure, the second PGW is a normal PGW.
And 203, determining a target access point from the access points accessed by the second PGW.
In this embodiment, if the access point to which the second PGW is connected is one, one access point to which the second PGW is connected is determined as the target access point. If the number of the access points accessed by the second PGW is multiple, any one of the access points accessed by the second PGW can be determined as the target access point.
In step 204, the target access point is used to access the target server, so as to realize that the user terminal accesses the virtual packet data network VPDN.
In this embodiment, after determining the target access point, the user terminal may access the target server by using the target access point, and communicate with the target server. Here, since the target access point is the access point of the accessed second PGW and the history access point of the last access to the VPDN of the user terminal is the access point of the accessed first PGW, the user terminal is allocated different static IP addresses in the current access and the last access, so that the target server can determine that the user terminal changes the PGW accessed to the VPDN according to the IP address of the user terminal at the last access and the IP address at the current access, and if it is determined that the user terminal changes the PGW accessed to the VPDN, the operator of the VPDN can detect and maintain the first PGW.
The method for accessing the user terminal to the network provided by the embodiment judges whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point; responding to the occurrence of a fault of a first PGW, acquiring a preconfigured second PGW and an access point accessed to the second PGW, wherein the second PGW and the first PGW are preconfigured with different static address pools; the second PGW is a normal PGW; determining a target access point from access points accessed by a second PGW; and accessing the target server by adopting the target access point to realize that the user terminal accesses the virtual packet data network VPDN. Since the second PGW and the first PGW are configured with different static address pools, the target server can determine that the PGW providing the bearer service is the first PGW or the second PGW through the static IP addresses belonging to the different static address pools, and can determine which user terminal the user terminal is in communication with through the addresses of the user terminals in the different static address pools, so that the first PGW and the second PGW can work simultaneously, the second PGW also provides the normal bearer service for the user terminal, and not just serves as a backup of the first PGW, in case of failure of the first PGW, the user terminal can select a target access point from the access points accessed by the second PGW, and then access the network by adopting the target access point. Therefore, for the user terminal accessing the virtual packet data network by using the static address pool, the user terminal accessing network method, the user terminal and the storage medium provided by the application can ensure that the user terminal normally accesses the network when the PGW function fails, thereby ensuring the user experience.
Example two
Fig. 3 is a flowchart of a method for accessing a user terminal according to a second embodiment of the present application, as shown in fig. 3, in which, based on the first embodiment, step 203 is refined, and step 203 refinement includes steps 301 to 302.
Step 301, obtaining a default access point configured in advance from the access points accessed by the second PGW.
In this embodiment, since more than one ue may access the second PGW by using the access point to which the second PGW is accessed, when the number of access points to which the second PGW is accessed is multiple, in order to make the number of ues that access the second PGW by using each access point as balanced as possible, so as to ensure the speed of each ue that accesses the second PGW, one default access point for default use may be preconfigured for the ue in the access point to which the second PGW is accessed, and after the ue acquires the preconfigured access point to which the second PGW is accessed, the second PGW is preferentially accessed by using the default access point.
In step 302, in response to the default access point being an access point with a normal communication link state, the default access point is determined to be the target access point.
In this embodiment, the communication link state of the access point refers to a communication link state between an access network element or a core network element where the access point is located and the PGW, and the user terminal accesses the PGW through the access point and needs to pass through multiple network elements. The normal state of the communication link of the access point means that the user terminal can successfully access the PGW through the access point. And responding to the preset default access point as the access point with normal communication link state, the user terminal can access the second PGW through the default access point and access the VPDN through the second PGW.
Specifically, a default access point in the access points accessed by the second PGW may be determined as a target access point, so as to avoid that when a plurality of user terminals access the second PGW by using the same APN, the APN load is too large, and the speed of accessing the PGW by the user terminals is affected.
In this embodiment, the ue may receive the communication link status of each access point sent by the target server when the VPDN successfully accesses the target server last time, and determine, during the process of accessing the VPDN this time, whether the communication link status of the default access point is normal from the communication link statuses of each access point received last time.
As an alternative embodiment, the user terminal may store the failure state of each PGW and the communication link state of each access point, where the failure state of the PGW may include failure and non-failure, and the communication link state of the access point may include normal communication link state and abnormal communication link state. After judging the fault state of the PGW and acquiring the communication link state of the access point each time, the user terminal can update the stored fault state of the PGW and the communication link state of the access point in real time so as to be used next time.
According to the network access method of the user terminal, the default access point which is preset is obtained from the access points accessed by the second PGW; in response to the default access point being the access point with the normal communication link state, determining the default access point as the target access point, and determining the default access point as the target access point when the default access point is the access point with the normal communication link state, so that the speed of the user terminal accessing the second PGW by the target access point can be ensured, and further, the user terminal can be ensured to access the VPDN quickly.
As an optional implementation manner, on the basis of the second embodiment, the step of determining whether the default access point is an access point with a normal communication link state further includes: steps 401 to 402.
In step 401, a communication link state request is sent to a target server using a default access point.
In response to receiving the communication link state normal information, the default access point is determined to be the access point with the normal communication link state, step 402.
In this embodiment, the ue may attempt to access the VPDN using a default access point and send a communication link status request to the target server. The communication link state request is used for indicating the target server to send default access point communication link state normal information to the user terminal. And the user terminal waits for receiving the normal state information of the communication link of the default access point sent by the target server in a preset time period. And if the communication link state normal information of the default access point sent by the target server is received within the preset time period, determining that the communication link state of the default access point is normal. And if the communication link state normal information of the default access point sent by the target server is not received within the preset time period, determining that the communication link state of the default access point is abnormal. Here, since the second PGW is normal, if the user terminal does not receive the default access point communication link state normal information transmitted by the target server within the preset period of time, it may be determined that the communication link state between the default access point and the PGW is abnormal, that is, the default access point is an access point whose communication link state is abnormal.
According to the network access method of the user terminal, a default access point is adopted to send a communication link state request to a target server; in response to receiving the communication link state normal information, determining the default access point as an access point with a normal communication link state, wherein the user terminal can normally communicate with the target server due to the fact that the user terminal receives the communication link state normal information, so that the communication link state of the default access point is the latest communication link state of the user terminal, and the situation that the user terminal cannot access the VPDN by adopting the default access point when determining the communication link state of the default access point as normal can be avoided.
As an alternative implementation manner, on the basis of the second embodiment, steps 501 to 502 are further included.
In step 501, in response to the default access point being an access point with abnormal communication link state, an access point with normal communication link state is obtained from the access points accessed by the second PGW.
In this embodiment, in response to the default access point being an access point with an abnormal communication link state, the user terminal may obtain the communication link state of each access point sent by the target server when the VPDN is successfully accessed to communicate with the target server last time. And determining the communication link state of each access point accessed by the second PGW from the communication link states of each access point received last time, and obtaining the access point with normal communication link state in the access point accessed by the second PGW.
Step 502, determining a target access point from the access points with normal communication link states.
In this embodiment, the ue may determine any one of the access points with normal communication link status as the target access point
As an optional real-time manner, the ue may further sequentially use the other access points accessed by the second PGW to attempt to access the VPDN, so as to determine the communication link states of the other access points accessed by the second PGW, and update the stored communication link states of the access points. And determining the access point with the highest speed when accessing the VPDN in each access point as a target access point.
According to the network access method of the user terminal, the access point with the normal communication link state is obtained from the access point accessed by the second PGW through responding to the default access point as the access point with the abnormal communication link state; the target access point is determined from the access points with normal communication link states, and when the default access point is abnormal, the access points with other normal communication link states are determined as the target access points, so that the user terminal can be ensured to normally access the VPDN.
Example III
Fig. 4 is a flowchart of a method for accessing a user terminal according to a third embodiment of the present application, as shown in fig. 4, where the method for accessing a user terminal according to the present embodiment further includes steps 601 to 603 on the basis of any one of the above embodiments.
In step 601, in response to the second PGW failing, it is determined whether the first PGW is restored to normal.
In this embodiment, when the access point to which the second PGW is connected cannot access the VPDN, it is determined that the second PGW has a fault. An attempt may be made to access the VPDN with the history access point, and if the history access point is able to access the VPDN, the first PGW resumes normal. If the history access point cannot access the VPDN and the number of access points accessed by the first PGW preconfigured by the user terminal is multiple, the other access points accessed by the first PGW may be sequentially adopted to attempt to access the VPDN, and if any one access point can access the VPDN, it may be determined that the first PGW is recovered to be normal.
In step 602, in response to the first PGW returning to normal, a target access point is determined from the access points to which the first PGW is connected.
In this embodiment, if there is only one access point (it can be understood that the one access point is a history access point) accessed by the first PGW, the history access point is determined as the target access point. If the number of access points accessed by the first PGW is multiple, any one of the access points that can successfully access the VPDN in step 601 may be determined as the target access point.
In step 603, the target access point is used to access the target server, so as to realize that the user terminal accesses the VPDN.
In this embodiment, the target access point is an access point used when accessing the target server, and the target access point identifies the VPDN where the target server is located. When the first PGW is in failure and the second PGW is normal, a target access point is determined from access points accessed by the second PGW, when the second PGW is in failure and the first PGW is recovered to be normal, the target access point is determined from the access points accessed by the first PGW, and the first PGW and the second PGW which are pre-configured with different static address pools are mutually used as backups, so that when any PGW fails, the user terminal can successfully access the VPDN, the network disconnection cannot be perceived, and the user experience is ensured.
According to the network access method of the user terminal, whether the first PGW is recovered to be normal is judged by responding to the occurrence of the fault of the second PGW; responding to the recovery of the first PGW, and determining a target access point from access points accessed by the first PGW; the target access point is used for accessing the target server so as to realize that the user terminal accesses the VPDN, and the success rate of the user terminal accessing the VPDN by adopting the target access point is improved because the target access point is determined from the access point accessed by the first PGW when the second PGW fails, and the user experience is further ensured.
Example IV
The method for accessing a user terminal to a network provided in this embodiment further includes step 701 after step 201 on the basis of any one of the above embodiments.
In step 701, in response to no failure, it is determined whether a history access point can be used to access the target server, where the history access point is an access point that is historically used by the user terminal to access the first PGW.
In this embodiment, the target server may be accessed by using a history access point, and if the target server can be successfully accessed, it is determined that the target server can be accessed by using the history access point. If the target server cannot be successfully accessed, determining that the target server cannot be accessed by adopting the historical access point.
As an alternative implementation manner, step 702 is further included on the basis of example four.
Step 702, in response to failing to access the target server with the history access point, performing a step of acquiring a second PGW configured in advance and an access point to which the second PGW accesses.
In this embodiment, if the number of access points to which the first PGW is connected is one, if it is determined that the history access points cannot be used to access the target server, at this time, the first PGW is not failed, which may be the case that the history access points have configuration errors or abnormal communication link states, and the user terminal cannot access the target server through the history access points, the step of acquiring the second PGW and the access points to which the second PGW is configured in advance may be performed, and further, the target access point may be determined from the access points to which the second PGW is configured in advance, so that the user terminal can access the target server through the target access point. If the number of access points accessed by the first PGW is multiple, because the information that the first PGW does not have a fault has timeliness, if the first PGW cannot be determined whether the first PGW has a fault in the process that the user terminal obtains the information that the first PGW does not have a fault and the user terminal accesses the VPDN, or the communication link state of the history access point is abnormal, in order to avoid frequently switching the access points accessed by the first PGW to attempt to access the target server, the steps of obtaining the second PGW and the access points accessed by the second PGW which are preconfigured can be directly performed, and the target access point is adopted to access the target server, so that the user terminal can access the VPDN more quickly, and further user experience is ensured.
As an alternative embodiment, step 703 is further included on the basis of example four.
In step 703, in response to failing to access the target server with the history access point, accessing the target server with an access point that is accessed to the first PGW and has a normal communication link.
In this embodiment, the number of access points to which the first PGW is connected is multiple, and in response to failure to use the history access point to access the target server, the communication link states of the rest of the access points to which the first PGW is connected can be sequentially determined, and any one access point which is connected to the first PGW and has a normal communication link state is used to access the target server. Specifically, the state information of each access point communication link published in the local area network where the user terminal is located in the process of accessing the VPDN by other user terminals can be checked, and the state of each other access point communication link accessed by the first PGW can be sequentially determined.
According to the method for accessing the network by the user terminal, the target server is accessed by adopting the access point which is accessed to the first PGW and has the normal communication link in response to the failure of accessing the target server by adopting the history access point, and the target server is accessed by adopting the access points with the normal communication link when the number of the access points accessed by the first PGW is multiple, so that the user terminal can be further ensured to be successfully accessed to the target server, and the user experience is ensured.
Example five
Fig. 5 is a schematic structural diagram of a ue access network device according to a fifth embodiment of the present application, and as shown in fig. 5, the ue access network device provided in this embodiment is located in a ue. The user terminal access network device 50 comprises a judging module 51, an acquiring module 52, a determining module 53 and an access module 54.
A judging module 51, configured to judge whether the first packet data network gateway PGW has a fault; and when the first PGW is not in failure, the first PGW is connected with the user terminal through the history access point.
An obtaining module 52, configured to obtain, in response to a failure of the first PGW, a second PGW configured in advance and an access point to which the second PGW is connected, where the second PGW and the first PGW are configured in advance with different static address pools; the second PGW is a normal PGW.
A determining module 53, configured to determine a target access point from the access points accessed by the second PGW.
An access module 54 is configured to access the target server by using the target access point, so as to enable the user terminal to access the virtual packet data network VPDN.
The method for accessing a user terminal to a network provided in the first embodiment may be implemented by the user terminal access network device provided in the present embodiment, and specific implementation manner and principle are similar, and are not repeated here.
As an optional implementation manner, the determining module 53 is specifically configured to obtain a default access point configured in advance from the access points accessed by the second PGW; and determining the default access point as the target access point in response to the default access point being the access point with the normal communication link state.
As an optional implementation manner, when determining whether the default access point is an access point with a normal communication link state, the determining module 53 is specifically configured to send a communication link state request to the target server by using the default access point; in response to receiving the communication link state normal information, the default access point is determined to be an access point for which the communication link state is normal.
As an optional implementation manner, the determining module 54 is further configured to, in response to the default access point being an access point with an abnormal communication link state, obtain an access point with a normal communication link state from the access points accessed by the second PGW; and determining the target access point from the access points with normal communication link states.
As an optional implementation manner, the judging module 51 is further configured to, in response to the second PGW failing, judge whether the first PGW returns to normal; the determining module 53 is further configured to determine, in response to the first PGW returning to normal, a target access point from the access points to which the first PGW is connected; the access module 54 is further configured to access the target server with the target access point to achieve access of the VPDN by the user terminal.
As an optional implementation manner, the determining module 51 is further configured to determine, in response to the first PGW not having a fault, whether to access the target server with a history access point, where the history access point is an access point that is historically used by the user terminal and accessed to the first PGW.
As an alternative embodiment, the obtaining module 52 is further configured to perform the step of obtaining the second PGW and the access point accessing the second PGW in advance, in response to the failure to access the target server with the history access point.
As an alternative embodiment, the access module 54 is further configured to access the target server with an access point that accesses the first PGW and has a normal communication link in response to being unable to access the target server with the history access point.
The network access device for a user terminal provided in this embodiment may perform the network access method for a user terminal provided in any one of the first to fourth embodiments, and specific implementation manners are similar to the principle, and are not repeated here.
Example six
Fig. 6 is a block diagram of a user terminal provided according to a sixth embodiment of the present application, and as shown in fig. 6, a user terminal 60 provided in this embodiment includes a memory 61, a processor 62, and a transceiver 63.
The memory 61, processor 62 and transceiver 63 are electrically interconnected.
The memory 61 stores computer-executable instructions.
The transceiver 63 is used for transmitting and receiving data.
The processor executes computer-executable instructions stored in the memory to implement the method for accessing a network for a user terminal as provided in any one of embodiments one to four.
The embodiment of the application also provides a computer readable storage medium, in which computer executable instructions are stored, and the computer executable instructions are used for implementing the method for accessing the user terminal to the network provided in any one of the above embodiments when being executed by a processor, and the specific implementation manner is similar to the principle, and will not be repeated here.
It will be appreciated that the device embodiments described above are merely illustrative and that the device of the application may be implemented in other ways. For example, the division of the units/modules in the above embodiments is merely a logic function division, and there may be another division manner in actual implementation. For example, multiple units, modules, or components may be combined, or may be integrated into another system, or some features may be omitted or not performed.
In addition, each functional unit/module in each embodiment of the present application may be integrated into one unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated together, unless otherwise specified. The integrated units/modules described above may be implemented either in hardware or in software program modules.
The integrated units/modules, if implemented in hardware, may be digital circuits, analog circuits, etc. Physical implementations of hardware structures include, but are not limited to, transistors, memristors, and the like. The processor may be any suitable hardware processor, such as CPU, GPU, FPGA, DSP and ASIC, etc., unless otherwise specified. Unless otherwise indicated, the storage elements may be any suitable magnetic or magneto-optical storage medium, such as resistive Random Access Memory RRAM (Resistive Random Access Memory), dynamic Random Access Memory DRAM (Dynamic Random Access Memory), static Random Access Memory SRAM (Static Random-Access Memory), enhanced dynamic Random Access Memory EDRAM (Enhanced Dynamic Random Access Memory), high-Bandwidth Memory HBM (High-Bandwidth Memory), hybrid Memory cube HMC (Hybrid Memory Cube), etc.
The integrated units/modules may be stored in a computer readable memory if implemented in the form of software program modules and sold or used as a stand-alone product. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are alternative embodiments, and that the acts and modules referred to are not necessarily required for the present application.
It should be further noted that, although the steps in the flowchart are sequentially shown as indicated by arrows, the steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in the flowcharts may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order in which the sub-steps or stages are performed is not necessarily sequential, and may be performed in turn or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments. The technical features of the foregoing embodiments may be arbitrarily combined, and for brevity, all of the possible combinations of the technical features of the foregoing embodiments are not described, however, all of the combinations of the technical features should be considered as being within the scope of the disclosure.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

Claims (8)

1. A method for a user terminal to access a network, the method comprising:
judging whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point;
Responding to the occurrence of a fault of the first PGW, acquiring a second PGW which is preconfigured and an access point which is accessed to the second PGW, wherein the second PGW and the first PGW are preconfigured with different static address pools; the second PGW is a normal PGW; the number of the access points accessed to the second PGW is a plurality of;
determining a target access point from the access points accessed by the second PGW;
the target access point is adopted to access a target server so as to realize that the user terminal accesses a Virtual Packet Data Network (VPDN);
the determining a target access point from the access points accessed by the second PGW includes:
acquiring a preset default access point from the access points accessed by the second PGW;
transmitting a communication link state request to a target server by adopting a default access point;
determining the default access point as a target access point in response to receiving the communication link state normal information;
responding to the default access point as the access point with abnormal communication link state, and acquiring the access point with normal communication link state from the access point accessed by the second PGW;
determining a target access point from the access points with normal communication link states;
wherein the access point to which the second PGW accesses is different from the access point to which the first PGW accesses.
2. The method as recited in claim 1, further comprising:
responding to the failure of the second PGW, judging whether the first PGW is recovered to be normal or not;
responding to the recovery of the first PGW, and determining a target access point from access points accessed by the first PGW;
and accessing the target server by adopting the target access point to realize the access of the user terminal to the VPDN.
3. The method of claim 1, wherein after determining whether the first packet data network gateway PGW has failed, further comprising:
and judging whether the target server can be accessed by adopting a history access point or not in response to no fault, wherein the history access point is an access point which is accessed to the first PGW and is historically adopted by the user terminal.
4. A method according to claim 3, further comprising:
and in response to the failure to access the target server by adopting the historical access point, executing the step of acquiring the second PGW which is pre-configured and the access point accessed by the second PGW.
5. A method according to claim 3, further comprising:
and in response to the failure to access the target server with the history access point, accessing the target server with an access point that is accessed to the first PGW and has a normal communication link.
6. A user terminal access network apparatus, comprising:
the judging module is used for judging whether the first packet data network gateway PGW has a fault or not; when the first PGW is not in fault, the first PGW is connected with a user terminal through a history access point;
an obtaining module, configured to obtain a second PGW configured in advance and an access point to which the second PGW is accessed in response to a failure of the first PGW, where the second PGW and the first PGW are configured in advance with different static address pools; the second PGW is a normal PGW; the number of the access points accessed to the second PGW is a plurality of;
a determining module, configured to determine a target access point from the access points accessed by the second PGW;
the access module is used for accessing the target server by adopting the target access point so as to realize that the user terminal accesses the Virtual Packet Data Network (VPDN);
the determining module is specifically configured to:
acquiring a preset default access point from the access points accessed by the second PGW;
transmitting a communication link state request to a target server by adopting a default access point;
determining the default access point as a target access point in response to receiving the communication link state normal information;
responding to the default access point as the access point with abnormal communication link state, and acquiring the access point with normal communication link state from the access point accessed by the second PGW;
Determining a target access point from the access points with normal communication link states;
wherein the access point to which the second PGW accesses is different from the access point to which the first PGW accesses.
7. A user terminal, comprising: memory, processor, and transceiver;
the memory, the processor, and the transceiver circuitry are interconnected;
the memory stores computer-executable instructions;
the transceiver is used for receiving and transmitting data;
the processor executes computer-executable instructions stored in the memory to implement the method of any one of claims 1 to 5.
8. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1 to 5.
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