CN112655244B

CN112655244B - Service processing method, device and storage medium

Info

Publication number: CN112655244B
Application number: CN201880097282.8A
Authority: CN
Inventors: 刘建华
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2023-06-27
Anticipated expiration: 2038-10-30
Also published as: CN112655244A; WO2020087308A1

Abstract

The invention discloses a service processing method, which comprises the following steps: the terminal equipment receives an indication of allowing a first service to be accessed through a second network from a first network element, wherein the first network element belongs to a first network; when the terminal equipment establishes a session in the second network aiming at the first service, carrying first information and a second session identifier of the first service in the second network in a first message; the first message is used for the terminal equipment to establish a session in the second network for the first service. The embodiment of the invention also provides another service processing method, equipment and a storage medium.

Description

Service processing method, device and storage medium

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a service processing method, a device, and a storage medium.

Background

For some services of the public land mobile network (Public Land Mobile Network, PLMN), a terminal Equipment (UE) may obtain services through at least two networks; for example, the terminal device may obtain the service through the PLMN, or may obtain the service through a Type-a Network (TAN) in a vertical industry local area Network (Vertical Local Access Network, VLAN) capable of accessing the PLMN. Therefore, there is no effective solution how to achieve service continuity for a service already established by a UE within a PLMN when the UE moves from the coverage of one network to the coverage of another network.

Disclosure of Invention

To solve the above technical problems, embodiments of the present invention provide a service processing method, device, and storage medium, which implement service continuity of a service already established by a UE in one network when the UE moves from a coverage area of the one network to a coverage area of the other network.

In a first aspect, an embodiment of the present invention provides a service processing method, including: the terminal equipment receives an indication of allowing a first service to be accessed through a second network from a first network element, wherein the first network element belongs to a first network; when the terminal equipment establishes a session in the second network aiming at the first service, carrying first information and a second session (IDentity, ID) of the first service in the second network in a first message; the first message is used for the terminal equipment to establish a session in the second network for the first service.

In a second aspect, an embodiment of the present invention provides a service processing method, including: the first core network element triggers a first service of the second network element based on the second information;

the second information includes: the first service maps a network protocol (Internet Protocol, IP) address corresponding to a first session identification ID of the first network to the IP address.

In a third aspect, an embodiment of the present invention provides a service processing method, where the method includes:

the second core network element acquires third information; the third information is used for migrating the first service from the first network to the second network, and at least comprises: the method comprises the steps that a first service is in a first session ID of a first network, an IP address corresponding to the first session ID and an IP address mapping relation.

In a fourth aspect, an embodiment of the present invention provides a terminal device, including: a receiving unit configured to receive an indication from a first network element that a first service is allowed to be accessed through a second network, the first network element belonging to the first network;

the first processing unit is configured to carry first information and a second session identification ID of the first service in the second network in a first message when the session is established in the second network for the first service;

the first message is used for the terminal equipment to establish a session in the second network for the first service.

In a fifth aspect, an embodiment of the present invention provides a first core network element, where the first core network element includes:

a second processing unit configured to trigger a first service of a second network element based on the second information;

the second information includes: the first service maps the network protocol IP address and the IP address corresponding to the first session identification ID of the first network.

In a sixth aspect, an embodiment of the present invention provides a second core network element, where the second core network element includes:

a third processing unit configured to acquire third information; the third information is used for migrating the first service from the first network to the second network, and at least comprises: the first service is in a first session identification ID of a first network, a network protocol IP address corresponding to the first session ID and an IP address mapping relation.

In a seventh aspect, an embodiment of the present invention provides a terminal device, including: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the service processing method executed by the terminal device when the computer program is run.

In an eighth aspect, an embodiment of the present invention provides a first core network element, including: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the service processing method executed by the first core network element when the computer program is run.

In a ninth aspect, an embodiment of the present invention provides a second core network element, including: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the service processing method executed by the second core network element when running the computer program.

In a tenth aspect, an embodiment of the present invention provides a storage medium storing an executable program, where the executable program when executed by a processor implements a service processing method executed by the terminal device.

In an eleventh aspect, an embodiment of the present invention provides a storage medium storing an executable program, where the executable program when executed by a processor implements the service processing method executed by the first core network element.

In a twelfth aspect, an embodiment of the present invention provides a storage medium storing an executable program, where the executable program when executed by a processor implements the service processing method executed by the second core network element.

According to the service processing method provided by the embodiment of the invention, the terminal equipment receives an instruction for allowing the first service to be accessed through the second network from the first network element in the first network, and when the terminal equipment establishes a session in the second network aiming at the first service, the terminal equipment carries a second session ID of the first service in the second network and a first session ID of the first service in the first network, or carries a second session ID of the first service in the second network and an IP address of the first service in the first network; when the terminal equipment moves from the first network to the second network, the IP address of the first service is still used when the first service is accessed to the first network when the first service is accessed to the second network, so that the continuity of the service when the network accessed by the terminal equipment is changed is realized.

Drawings

Fig. 1 is a schematic flow diagram of a related art terminal device obtaining a service;

fig. 2 is a schematic diagram of a communication system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an alternative processing flow of a service processing method applied to a terminal device according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an alternative processing flow of a service processing method applied to a first core network element according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an alternative processing flow of a service processing method applied to a second core network element according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a process flow of establishing a PDU Session under a first network by a terminal device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a process flow of migrating a PDU Session from a first network to a second network according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a composition structure of a terminal device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first core network element according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second core network element according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a hardware composition structure of an electronic device according to an embodiment of the present invention.

Detailed Description

So that the manner in which the features and techniques of the embodiments of the present invention can be understood in more detail, a more particular description of the invention, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the present invention.

Before describing embodiments of the present invention in detail, a VLAN is first described in detail. The need to support VLANs is introduced in 5G systems. The VLAN is classified into a TAN capable of accessing the PLMN and a (Type-b Network, TBN) incapable of accessing the PLMN according to whether the PLMN is accessed. For some services of the PLMN, the UE may obtain the services through the PLMN or TAN, as shown in fig. 1: the user plane functions (User Port Function, UPF) and UPF-a can access the same Data network (Data Net, DN); wherein network elements having the same PLMN and TAN functions may be shared.

The service processing method of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, or 5G systems, and the like.

Exemplary, a communication system 100 to which embodiments of the present application apply is shown in fig. 2. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. Alternatively, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. "terminal device" as used herein includes, but is not limited to, a connection via a wireline, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal device arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminal devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.

Alternatively, direct terminal (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 2 illustrates one network device and two terminal devices by way of example, and alternatively, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 2 as an example, the communication device may include the network device 110 and the terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be the specific devices described above, which are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

The optional processing flow of the service processing method applied to the terminal device provided by the embodiment of the invention, as shown in fig. 3, comprises the following steps:

in step S201, the terminal device receives an indication from the first network element to allow the first service to be accessed through the second network.

In some embodiments, the first network element is a packet control function (Packet Control Function, PCF) entity, the first network element belongs to a first network, the first network is a PLMN network, and the second network is a TAN network.

Correspondingly, the terminal device obtains a first UE Route selection POLICY (urs) from the PCF entity; the urs may include: -single network slice selection assistance information (Single Network Slice Selection Assistance Information, S-nsai), data network Name (Data Net Name, DNN) corresponding to the application identity (Application Identity, APP ID), a first indication; the first indication is used for indicating that the service of the APP corresponding to the APP ID is allowed to be accessed through the TAN, and the TAN ID can be contained; or the first indication is used for indicating that the service of the APP corresponding to the APP ID is not allowed to be accessed through the TAN, and may further include the TAN ID.

Step S202, when the terminal device establishes a session with respect to the first service in the second network, the first message carries first information and a second session ID of the first service in the second network.

Here, the first message is used for the terminal device to establish a session in the second network for the first service.

In some embodiments, after the terminal device moves from the PLMN network into the TAN coverage area and accesses the TAN network, the terminal device sends a first message to the second AMF; optionally, the first message is a first NAS message carrying PDU Session Establishment Request; the first NAS message includes a second Session ID (Session ID 2) corresponding to a second Session in the TAN network.

Optionally, the first NAS message further includes a first Session identifier ID (Session ID 1) of the first service in the first network; each Session ID corresponds to an IP address, where the IP address has an IP address mapping relationship, and is used to characterize a mapping relationship between an IP address in the operator network and an IP address outside the operator network. The first NAS message may also indicate that the PDU Session was transferred from the PLMN network. Based on the session identification, a corresponding IP address can be obtained, which is used by the second SMF when the terminal device establishes a second session in the second network.

Optionally, the first NAS message further includes an IP address corresponding to a first session ID of the first service in the first network; at this time, the IP address of the Session ID1 can be directly acquired without querying the correspondence between the Session ID and the IP address, where the IP address is used by the second SMF when the terminal device establishes the second Session in the second network.

Optionally, the first NAS message further includes a Request Type (Request type=exiting), DNN.

The optional processing flow of the service processing method applied to the first core network element provided by the embodiment of the invention, as shown in fig. 4, includes the following steps:

step S301, the first core network element triggers the first service of the second network element based on the second information.

Here, the first core network element belongs to a first network, the second network element is a server, and the first service is a registration service; the second information includes: the first service is in the mapping relation between the IP address and the IP address corresponding to the first Session ID (Session ID 1) of the first network.

In some embodiments, when the terminal device initiates PDU Session establishment for the first service of the first network, a second NAS message is sent to the first AMF, where the second NAS message includes Session ID1, request type=initial, S-nsai, DNN, and PDU Session Establishment Request. The first AMF triggers session establishment service of a first core network element; the first core network element inquires local configuration information, judges that the first service can be accessed through the TAN network according to the S-NSSAI and DNN, and triggers the first service of the second network element when the service continuity of the first service needs to be maintained.

When the first core network element triggers the first service of the second network element, the message sent to the second network element carries the mapping relation of the IMSI, the Session ID1, the IP address and the IP address.

Optionally, the first core network element is a first SMF of a first network, and the second network element is a unified data management platform (Unified Data Manager, UDM).

In some embodiments, after step S301, the method further comprises:

the first core network element invokes a registration service of the UDM, the first core network element interacts information such as IMSI, session ID1, S-NSSAI, DNN, IP address, IP address mapping relation and the like with the UDM, the first core network element triggers NIN 2Message Transfer service of the first AMF, and the Session ID1 is sent to the terminal device, so that the terminal device knows the first Session ID1 of the first Session established in the first network from the first AMF.

The optional processing flow of the service processing method applied to the second core network element provided by the embodiment of the invention, as shown in fig. 5, includes the following steps:

step S401, the second core network element acquires third information.

Here, the third information is used to migrate the first service from the first network to the second network, and the third information includes at least: the first service is in a first session identification ID of a first network, an IP address corresponding to the first session ID and an IP address mapping relation.

In some embodiments, the second core network element obtaining the third information includes:

the second core network element receives a second message sent by the third network element, wherein the second message carries a second Session ID (Session ID 2) of the first service in the second network; and triggering a second service of the second network element by the second core network element, wherein the second service is used for acquiring the Session ID1 of the first service in the first network, the IP address corresponding to the Session ID1 and the IP address mapping relation.

In some embodiments, the second core network element is a second SMF, the second SMF belongs to a second network, the third network element is a second AMF, the second network element is a UDM, the first network is a PLMN network, and the second network is a TAN network.

In some embodiments, after step S401, the method further comprises:

the second core network element invokes an N1N2message transfer service of the second AMF, including: IMSI, session ID2, PDU Session Establishment Accept; PDU Session Establishment Accept may not include an IP address; the second AMF sends a third NAS message to the UE based on the N1N2message transfer service, wherein the third NAS message comprises Session ID2 and PUD Session Establishment Accept; at this time, the terminal device establishes a second session in the second network, and the IP address corresponding to the second session is still the IP address corresponding to the first session; namely, the first Session of the Session identifier of the first service in the first network is Session ID1, and the second Session of the Session identifier of the first service in the second network is Session ID2, which uses the same IP address, so that the continuity of the first service is ensured when the terminal equipment is switched from the first network to the second network.

The process flow diagram of the terminal device for establishing the PDU Session under the first network (PLMN) in the embodiment of the present invention, as shown in fig. 6, includes:

in step S501, the terminal device registers with the PLMN.

In step S502, the terminal device obtains a urs p from the first PCF.

The system comprises an S-NSSAI, DNN and a first indication corresponding to a certain App ID, wherein the first indication indicates whether the service of the App can be accessed through a second network (TAN), and the TAN ID.

In step S503, the terminal device triggers PDU Session establishment for PLMN service, allocates Session ID1, and sends NAS message to the first AMF, where the NAS message includes Session ID1, request type=initial, S-nsai, DNN, PDU Session Establishment Request.

In step S504, the first AMF triggers a Session establishment service of the first SMF, which includes IMSI, session ID1, request type=initial, S-NSSAI, DNN, PDU Session Establishment Request.

In step S505, the first SMF queries the local configuration information, and when the service can be accessed through the TAN and service continuity is required according to the S-nsai and DNN judgment, the first SMF triggers the registration service of the UDM, where the registration service includes the mapping relationship of the IMSI, the Session ID1, the S-nsai, the DNN, the IP address and the IP address. The UDM stores the above information list in the UE SM Context. The mapping relation of the IP addresses is the mapping relation between the network IP addresses in the operator network and the network IP addresses outside the operator network.

In step S506, the first SMF triggers an N1N2message transfer service of the first AMF, which includes IMSI, session ID1, PDU Session Establishment Accept.

In step S507, the first AMF sends a NAS message to the terminal device, where the NAS message includes Session IDs 1 and PDU Session Establishment Accept.

After establishing a PDU Session under a first network (PLMN) based on the terminal equipment, the terminal equipment moves from the first network to a second network (TAN), and the corresponding PDU Session also needs to be migrated to the TAN so as to ensure the continuity of the service; the process flow diagram for migrating the PDU Session from the first network to the second network, as shown in fig. 7, includes:

in step S601, after the terminal device moves to the coverage of the TAN and accesses the TAN network, the terminal device sends a NAS message carrying PDU Session Establishment Request to the second AMF. Session ID2 of the Session contained in the TAN in the NAS message, request type=exiting, DNN; PDU Session Establishment Request contains a PDU Session ID to be switched to TAN, i.e. Session ID1 in the above embodiment, which is established in the PLMN, and possibly a second indication that the PDU Session is transferred from the PLMN. Here, session ID2 may be the same as or different from Session ID1.

In step S602, the second AMF triggers a Session establishment service of the second SMF, which includes IMSI, session ID2, request type=exiting, DNN, PDU Session Establishment Request.

In step S603, the second SMF determines that the PDU Session is a PDU Session transferred from the PLMN according to the indication or carrying Session ID1 in PDU Session Establishment Request, and invokes the acquisition service of the second UDM to request the Session management related subscription information of the terminal device, where the subscription information includes IMSI and Session ID1.

In step S604, the UDM queries the mapping relationship between the IP address and the IP address corresponding to the Session ID1 from the SM context of the terminal device according to the IMSI and the Session ID1, and responds the mapping relationship between the IMSI and the Session ID1, the IP address and the IP address to the second SMF.

In step S605, the second SMF triggers an N1N2message transfer service of the second AMF, where the IMSI, session ID2, PDU Session Establishment Accept, PDU Session Establishment Accept may not include the IP address.

In step S606, the second AMF sends a NAS message to the terminal device, which includes Session ID2 and PDU Session Establishment Accept. The terminal equipment multiplexes the IP address corresponding to the Session ID1 into the IP address of the Session ID 2.

In the embodiment of the invention, when the terminal equipment moves from the first network to the second network, the IP address of the first service of the terminal equipment in the first network is ensured to be the same as the IP address of the first service of the terminal equipment in the second network, so that the continuity of the service is realized.

In the above embodiments of the present invention, the UDM may be managed by an operator or by a third party.

The embodiment of the present invention further provides a terminal device, where the composition structure of the terminal device 800, as shown in fig. 8, includes:

a receiving unit 801 configured to receive an indication from a first network element, the first network element belonging to a first network, that a first service is allowed to be accessed via a second network;

a first processing unit 802 configured to carry, in a first message, first information and a second session ID of the first service in the second network when a session is established in the second network for the first service; the first message is used for the terminal equipment to establish a session in the second network for the first service.

In an embodiment of the present invention, the first information includes: the first service is at a first session ID of the first network or an IP address corresponding to the first session ID of the first service in the first network.

In an embodiment of the invention, the receiving unit is configured to receive a urs p from the first network element, where the urs p includes an indication that the first service is allowed to be accessed through the second network.

In an embodiment of the present invention, the first message further includes a first indication, where the first indication is used to indicate that the session is migrated from the first network to the second network.

The embodiment of the present invention further provides a first core network element, and a schematic structural diagram of the first core network element 900, as shown in fig. 9, includes:

a second processing unit 901 configured to trigger a first service of a second network element based on the second information;

the second information includes: the first service is in the IP address and IP address mapping relation corresponding to the first session identification ID of the first network.

The embodiment of the present invention further provides a second core network element, and a schematic structural diagram of a second core network element 1000, as shown in fig. 10, includes:

a third processing unit 1001 configured to acquire third information; the third information is used for migrating the first service from the first network to the second network, and at least comprises: the method comprises the steps that a first service is in a first session ID of a first network, an IP address corresponding to the first session ID and an IP address mapping relation.

In this embodiment of the present invention, the third processing unit 1001 is configured to receive a second message sent by a third network element, where the second message carries a second session ID of the first service in the second network.

The third processing unit 1001 is configured to trigger a second service of a second network element, where the second service is configured to obtain a first session ID of the first service in the first network, an IP address corresponding to the first session ID, and an IP address mapping relationship.

It should be noted that, the first core network element and the second core network element provided by the embodiment of the present invention have the same function, and the first core network element belongs to a first network, the second core network element belongs to a second network, and the first network and the second network are different networks.

The embodiment of the invention also provides a terminal device, which comprises a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used for executing the steps of the service processing method executed by the terminal device when the computer program runs.

The embodiment of the invention also provides a first core network element, which comprises a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used for executing the steps of the service processing method executed by the network equipment when the computer program runs.

The embodiment of the invention also provides a second core network element, which comprises a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used for executing the steps of the service processing method executed by the network equipment when running the computer program.

Fig. 11 is a schematic diagram of a hardware composition structure of an electronic device (a terminal device or a first core network element or a second core network element) according to an embodiment of the present invention, where an electronic device 700 includes: at least one processor 701, memory 702, and at least one network interface 704. The various components in the electronic device 700 are coupled together by a bus system 705. It is appreciated that the bus system 705 is used to enable connected communications between these components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 705 in fig. 11.

It is to be appreciated that the memory 702 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Wherein the nonvolatile Memory may be ROM, programmable read-Only Memory (PROM, programmable Read-Only Memory), erasable programmable read-Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable read-Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk read-Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory 702 described in embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The memory 702 in embodiments of the invention is used to store various types of data to support the operation of the electronic device 700. Examples of such data include: any computer program for operating on the electronic device 700, such as application 7022. A program for implementing the method of the embodiment of the present invention may be contained in the application program 7022.

The method disclosed in the above embodiment of the present invention may be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 701 or by instructions in the form of software. The processor 701 may be a general purpose processor, a digital signal processor (DSP, digital Signal Processor), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium in a memory 702. The processor 701 reads information in the memory 702 and, in combination with its hardware, performs the steps of the method as described above.

In an exemplary embodiment, the electronic device 700 can be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSP, programmable logic device (PLD, programmable Logic Device), complex programmable logic device (CPLD, complex Programmable Logic Device), FPGA, general purpose processor, controller, MCU, MPU, or other electronic components for performing the aforementioned methods.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a terminal device in an embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the terminal device in each method of the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to the first core network element in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method of the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to the second core network element in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method of the embodiment of the present application, which is not described herein for brevity.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is not intended to limit the scope of the invention, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the invention.

Claims

1. A method of traffic handling, the method comprising:

the terminal equipment receives an indication of allowing a first service to be accessed through a second network from a first network element, wherein the first network element belongs to a first network;

when the terminal equipment establishes a session in the second network aiming at the first service, a first message carries a first session identification ID of the first service in the first network, a network protocol (IP) address corresponding to the first session ID, a mapping relation used for representing an IP address in an operator network and an IP address outside the operator network, a second session identification ID of the first service in the second network and a first indication, wherein the first indication is used for indicating that the session is migrated from the first network to the second network;

the first message is used for the terminal equipment to establish a session in the second network aiming at the first service;

the first network is a public land mobile network PLMN, and the second network is a Type-a network TAN.

2. The method of claim 1, wherein the terminal device receiving, from the first network element, an indication that the first service is allowed to be accessed through the second network, comprises:

the terminal device receives a terminal device routing policy, urs, from a first network element, the urs comprising an indication that a first service is allowed to be accessed through a second network.

3. The method according to claim 1 or 2, wherein the first network element is a packet control function, PCF.

4. The method of claim 1 or 2, wherein the first message is a non-access stratum, NAS, message.

5. A method of traffic handling, the method comprising:

according to the second information, when judging that the first service is allowed to be accessed through a Type-a network TAN and the service continuity of the first service needs to be maintained, the first core network element triggers a first service of a second network element, wherein the first service is a registration service;

wherein the second information includes: the method comprises the steps that a first service is in a first session identification ID of a first network, a network protocol IP address corresponding to the first session identification ID and a mapping relation used for representing an IP address in an operator network and an IP address outside the operator network;

wherein the first network is a public land mobile network PLMN, and the second network element is a unified data management platform UDM.

6. The method of claim 5, wherein the first core network element is a session management function, SMF.

7. A method of traffic handling, the method comprising:

the second core network element acquires third information; the third information is used for migrating the first service from the first network to the second network, and at least comprises: the method comprises the steps that a first service is in a first session identification ID of a first network, a network protocol IP address corresponding to the first session ID and a mapping relation used for representing an IP address in an operator network and an IP address outside the operator network;

8. The method of claim 7, wherein the second core network element obtains third information, comprising:

the second core network element receives a second message sent by a third network element, wherein the second message carries a second session ID of the first service in a second network.

9. The method of claim 7, wherein the second core network element obtains third information, comprising:

the second core network element triggers a second service of the second network element, where the second service is configured to obtain a first session ID of the first service in the first network, an IP address corresponding to the first session ID, and a mapping relationship between an IP address in the operator network and an IP address outside the operator network.

10. A terminal device, the terminal device comprising:

a receiving unit configured to receive an indication from a first network element that a first service is allowed to be accessed through a second network, the first network element belonging to the first network;

a first processing unit, configured to carry, in a first message, a first session identifier ID of the first service in the first network, a network protocol IP address corresponding to the first session ID, a mapping relationship for characterizing an IP address within an operator network and an IP address outside the operator network, a second session identifier ID of the first service in the second network, and a first indication for indicating that the session is migrated from the first network to the second network, when a session is established for the first service in the second network;

11. The terminal device according to claim 10, wherein the receiving unit is configured to receive a terminal device routing policy, urs, from the first network element, the urs comprising an indication that the first service is allowed to be accessed through the second network.

12. The terminal device of claim 10 or 11, wherein the first network element is a packet control function, PCF.

13. The terminal device of claim 10 or 11, wherein the first message is a non-access stratum, NAS, message.

14. A first core network element, the first core network element comprising:

the second processing unit is configured to trigger a first service of a second network element according to the second information when judging that the first service is allowed to be accessed through a Type-a network TAN and service continuity of the first service needs to be maintained, wherein the first service is a registration service;

the second information includes: the method comprises the steps that a first service is in a first session identification ID of a first network, a network protocol IP address corresponding to the first session identification ID and a mapping relation used for representing an IP address in an operator network and an IP address outside the operator network;

15. A second core network element, the second core network element comprising:

a third processing unit configured to acquire third information; the third information is used for migrating the first service from the first network to the second network, and at least comprises: the method comprises the steps that a first service is in a first session identification ID of a first network, a network protocol IP address corresponding to the first session ID and a mapping relation used for representing an IP address in an operator network and an IP address outside the operator network;

16. The second core network element according to claim 15, wherein the third processing unit is configured to receive a second message sent by a third network element, where the second message carries a second session ID of the first service in the second network.

17. The second core network element according to claim 15, wherein the third processing unit is configured to trigger a second service of the second network element, where the second service is configured to obtain a first session ID of the first service in the first network, an IP address corresponding to the first session ID, and a mapping relationship between an IP address inside the operator network and an IP address outside the operator network.

18. A terminal device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor being arranged to execute the steps of the service processing method of any of claims 1 to 4 when the computer program is run.

19. A first core network element comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is configured to execute the steps of the service processing method according to claim 5 or 6 when the computer program is run.

20. A second core network element comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor being arranged to execute the steps of the service processing method of any of claims 7 to 9 when the computer program is run.

21. A storage medium storing an executable program which, when executed by a processor, implements the service processing method of any one of claims 1 to 4.

22. A storage medium storing an executable program which, when executed by a processor, implements the service processing method of claim 5 or 6.

23. A storage medium storing an executable program which, when executed by a processor, implements the service processing method of any one of claims 7 to 9.