CN111385788B - Service processing method of mobile terminal and mobile terminal - Google Patents
Service processing method of mobile terminal and mobile terminal Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 4
- 101100398918 Arabidopsis thaliana IPMS2 gene Proteins 0.000 description 3
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- 101000616761 Homo sapiens Single-minded homolog 2 Proteins 0.000 description 3
- 101100018850 Luffa aegyptiaca IMS1 gene Proteins 0.000 description 3
- 102100031980 Single-minded homolog 1 Human genes 0.000 description 3
- 102100021825 Single-minded homolog 2 Human genes 0.000 description 3
- 101100455985 Arabidopsis thaliana MAM3 gene Proteins 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
- H04W8/183—Processing at user equipment or user record carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0485—Networking architectures for enhanced packet encryption processing, e.g. offloading of IPsec packet processing or efficient security association look-up
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Computer Networks & Wireless Communication (AREA)
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Abstract
A service processing method of a mobile terminal and the mobile terminal are provided, the service processing method comprises: when a first user identification card has a switching requirement, the first user identification card adopts a second connection of a second user identification card to establish a new data path; the first subscriber identity module card carries out a first service through the new data path; the first subscriber identity module card and the second subscriber identity module card are located in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection. When the first subscriber identity module card has a switching requirement, a first service is performed through a second connection of a second subscriber identity module card, so that even if the first subscriber identity module card and the second subscriber identity module card belong to different operators, the mobile terminal can support the first service to be performed by the first subscriber identity module card and the second subscriber identity module card at the same time, and the use experience of a user is improved.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a service processing method for a mobile terminal and a mobile terminal.
Background
With the development of mobile communication technology, it has become a common phenomenon to cover multiple network signals in the same area, thereby causing a strong competition among operators operating different mobile networks and bringing users a richer choice. In order to facilitate a user to flexibly select different mobile networks according to own needs, many mobile terminals have a multi-card function.
At present, for two Subscriber Identity Module (SIM) cards simultaneously registered in an Internet Protocol Multimedia Subsystem (IMS) network in a mobile terminal, when one card (card 1) performs an IMS service, the other card (card 2) may not perform the IMS service during the IMS service performed by the card 1. When a user uses a mobile terminal containing a plurality of SIM cards, the two cards cannot simultaneously perform IMS services, which is inconvenient for the user.
Therefore, a new service processing method for a mobile terminal is needed to implement dual-card dual-standby of the mobile terminal and also implement dual-pass.
Disclosure of Invention
In order to implement dual-card dual-standby dual-pass of a mobile terminal, an embodiment of the present invention provides a service processing method for a mobile terminal, including: when a first user identification card has a switching requirement, the first user identification card adopts a second connection of a second user identification card to establish a new data path; the first subscriber identity module card carries out a first service through the new data path; the first subscriber identity module card and the second subscriber identity module card are located in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection.
Optionally, the establishing, by the first subscriber identity card, a new data path by using the second connection of the second subscriber identity card includes: the first user identification card accesses the Internet in a 3GPP wireless access mode by adopting second connection of a second user identification card and is connected with an ePDG network element of a first home network; the first user identification card establishes an IPSec tunnel connected with the ePDG network element as a new data path; and the first home network is a home network corresponding to the first subscriber identity card.
Optionally, the IPSec tunnel is established in a VoWiFi manner, and is used to carry the first service of the first subscriber identity card.
Optionally, the first subscriber identity card accesses the first home network through the IPSec tunnel.
Optionally, the performing, by the first subscriber identity card, the first service through the new data path includes: and transmitting service data in the first service between the first subscriber identity card and the first home network through the ePDG network element.
Optionally, the first service includes an IMS service.
Optionally, the IMS service includes: registration, voice call, video call, and short message service.
Optionally, the second service includes a data service.
Optionally, the first subscriber identity card having a switching requirement includes: the first subscriber identity card is unable to perform a first service via its first connection.
Optionally, the first subscriber identity card failing to perform the first service through the first connection thereof includes: the second subscriber identity card is performing a first service.
Optionally, the first subscriber identity card having a switching requirement includes: the signal quality of the first subscriber identity card is lower than a signal threshold or the first subscriber identity card is in a roaming state.
Optionally, the method further comprises: and if the switching requirement does not exist any more, the first subscriber identity module card is switched back to the first connection to carry out the first service.
The embodiment of the present invention further provides a mobile terminal, including a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the program to implement the following steps, where the steps include: when a switching requirement exists, the first subscriber identity module card adopts a second connection of the second subscriber identity module card to establish a new data path; the first subscriber identity module card carries out a first service through the new data path; the first subscriber identity module card and the second subscriber identity module card are located in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection.
Optionally, the establishing, by the first subscriber identity card, a new data path by using the second connection of the second subscriber identity card includes: the first user identification card accesses the internet in a 3GPP wireless access mode by adopting the second connection of the second user identification card and is connected with an ePDG network element of a first home network; the first user identification card establishes an IPSec tunnel connected with the ePDG network element as a new data path; the first home network is a home network corresponding to the first subscriber identity card.
Optionally, the IPSec tunnel is established in a VoWiFi manner, and is used to carry the first service of the first subscriber identity card.
Optionally, the first subscriber identity card accesses the first home network through the IPSec tunnel.
Optionally, the performing, by the first subscriber identity card, the first service through the new data path includes: and transmitting service data in the first service between the first subscriber identity card and the first home network through the ePDG network element.
Optionally, the first service includes an IMS service.
Optionally, the IMS service includes: registration, voice call, video call, and short message service.
Optionally, the second service includes a data service.
Optionally, the first subscriber identity card having a switching requirement includes: the first subscriber identity module card cannot perform a first service through a first connection thereof.
Optionally, the first subscriber identity card failing to perform the first service through the first connection thereof includes: the second subscriber identity card is performing a first service.
Optionally, the first subscriber identity card having a switching requirement includes: the signal quality of the first subscriber identity card is lower than a signal threshold or the first subscriber identity card is in a roaming state.
Optionally, the method further comprises: and if the switching requirement does not exist any more, the first subscriber identity module card is switched back to the first connection thereof to carry out the first service.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
the service processing method provided by the technical scheme of the invention comprises the following steps: when a first user identification card has a switching requirement, the first user identification card adopts a second connection of a second user identification card to establish a new data path; the first subscriber identity module card carries out a first service through the new data path; the first subscriber identity module card and the second subscriber identity module card are located in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection. In the technical scheme of the invention, when the first subscriber identity card has a switching requirement, the first service is carried out through the second connection of the second subscriber identity card, so that even if the first subscriber identity card and the second subscriber identity card belong to different operators, the mobile terminal can support the first service and the second service to be carried out simultaneously, thereby improving the use experience of a user.
Drawings
Fig. 1 is a flowchart illustrating a service processing method of a mobile terminal according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mobile communication system according to an embodiment of the present invention; and
fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The current dual-card dual-standby mobile terminal is mainly a single-pass terminal, two SIM cards are continuously switched between two networks corresponding to the two SIM cards through bottom layer software and a control chip of the mobile terminal, because the switching time is very short, a user is difficult to feel the switching, so that the simultaneous standby of the two SIM cards is realized, but when the SIM card 1 is in a call, the SIM card 2 is in an off-line state, and the SIM card 2 cannot perform voice call service.
In the existing bi-pass scheme, two sets of baseband chips, radio frequency chips and memory systems can support two SIM cards to work simultaneously, and when the SIM card 1 is in a call, the SIM card 2 can also be in a call simultaneously. But this solution has the disadvantages of higher cost, complex design and higher power consumption.
In another conventional bi-pass scheme, when the SIM card 1 is performing a call, the SIM card 2 can perform a call simultaneously through a wireless connection between the SIM card 1 and a wireless network, but in this scheme, the SIM2 needs to reuse a wireless connection carrying a call service of the SIM card 1. This therefore requires that the SIM1 belong to the same operator as the SIM2, and therefore if the SIM card in the user's mobile terminal belongs to a different operator, the mobile terminal still cannot implement bi-calling.
In the technical scheme of the invention, when the first subscriber identity card has a switching requirement, the first service is carried out through the second connection of the second subscriber identity card, so that even if the first subscriber identity card and the second subscriber identity card belong to different operators, the mobile terminal can support the first service and the second service to be carried out simultaneously, thereby improving the experience of a user using the mobile terminal.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below.
With reference to fig. 1 and fig. 2 in combination, fig. 1 is a schematic flowchart of a service processing method of a mobile terminal according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a mobile communication system according to an embodiment of the present invention.
In S11, when the first subscriber identity card has a handover requirement, the first subscriber identity card establishes a new data path using the second connection of the second subscriber identity card.
In S12, the first subscriber identity card performs a first service through the new data path.
It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution sequence of the steps.
In some embodiments, when the first subscriber identity card has a handover requirement, the first subscriber identity card establishes a new data path using the second connection of the second subscriber identity card. Wherein the first subscriber identification card (SIM1) and the second subscriber identification card (SIM2) are located within the same mobile terminal. Specifically, the second subscriber identity card performs a first service through a first connection thereof, and performs a second service through a second connection thereof. The first subscriber identity module card and the second subscriber identity module card are subscriber identity modules of the same operator, and may also be subscriber identity modules of different operators.
In the embodiment of the present invention, any one of the subscriber identity cards in the terminal may be used as the first subscriber identity card. The first connection may be an IMS Public Data Network (PDN) of a subscriber identity card; the second connection may be a DATA (DATA) PDN of a subscriber identity card.
In some embodiments, the first service may be an IMS service. Specifically, the IMS services include, but are not limited to: registration, voice call, video call, and short message service. The second service comprises a data service, for example, browsing a web page.
In some embodiments, the first subscriber identity card having a handover requirement comprises: the first subscriber identity card is unable to perform a first service via its first connection. Typically, the first subscriber identity card may perform the first service through its first connection, but in some cases, the first subscriber identity card may not perform the first service through its first connection. At this time, in the embodiment of the present invention, the first subscriber identity card may perform the first service through the second connection of the second subscriber identity card.
In some embodiments, the first subscriber identity card being unable to perform the first service via its first connection comprises: the second subscriber identity card is performing a first service.
Specifically, when the second subscriber identity card is performing the first service, if the network side sends an IMS service request (for example, a call request) to the first subscriber identity card located in the same mobile terminal, the first subscriber identity card cannot perform the first service through the first connection due to the limitation of dual-card dual-standby single-pass if the service request cannot be received. At this time, the first subscriber identity module card may perform the first service based on the second connection of the second subscriber identity module card, thereby implementing the dual-pass function and preventing the user from missing important information. In some embodiments, the first subscriber identity card leaves the region where the operator provides the service, and the first service cannot be performed through the first connection, and at this time, the first service may also be performed through the second connection of the second subscriber identity card.
In some embodiments, the first subscriber identity card having a handover requirement comprises: the signal quality of the first subscriber identity card is lower than a signal threshold or the first subscriber identity card is in a roaming state.
Specifically, in some cases, the quality of the signal that can be received by the first subscriber identity card is low and is lower than the signal threshold, so that the first subscriber identity card experiences a low experience when performing the first service, for example, the call quality is poor. In some embodiments, the first subscriber identity card is in a roaming state, and although the first service can be performed through its first connection, the tariff is higher. Therefore, the first subscriber identity module card performs the first service through the second connection of the second subscriber identity module card, so that the service quality can be ensured, and meanwhile, the expense is reduced, thereby improving the user experience.
As shown in fig. 2, the mobile terminal (UE) includes the first subscriber identification card (SIM1) and the second subscriber identification card (SIM 2). The first user identification card and the second user identification card respectively comprise IMS modules (IMS1 and IMS2) and DATA modules (DATA1 and DATA2), and the DATA is optional.
In some embodiments, the second subscriber identity card establishes the first connection through an IMS PDN (PATH1), accesses a second PDN Gateway ((PGW2) PDN Gateway, PGW) corresponding thereto in a 3GPP manner, for example, a Long Term Evolution (LTE) protocol, a New Radio interface (New Radio) protocol, and accesses a second home network (SIM2HPLMN) corresponding thereto through the PGW 2. Specifically, the second subscriber identity card accesses a second IMS core network (IMS2 core network) corresponding to the second subscriber identity card through the PGW2 to perform the first service. The second Home Network is a Home Network corresponding to the second subscriber identity card, that is, a Home Public Land Mobile Network (HPLMN).
The second subscriber identity card also establishes a second connection through a DATA PDN to access the PGW2, and accesses the internet (Intemet) through the PGW2 to perform a second service.
In some embodiments, the first subscriber identity card establishes a new data path using the second connection of the second subscriber identity card. Specifically, the first subscriber identity card accesses the internet in a 3GPP wireless access manner by using a second connection of a second subscriber identity card, and is connected to an evolved Packet Data Gateway (ePDG) network element of the first home network; and establishing an internet Protocol Security (IPSec) tunnel connected to the ePDG network element as a new data PATH (PATH 2). The first subscriber identity module card is accessed to the first home network through the IPSec tunnel, and the first home network is a home network corresponding to the first subscriber identity module card. The IPSec tunnel may provide encrypted security services to ensure that the first subscriber identity card communicates securely and securely over the IP network. Specifically, the IPSec tunnel is established in a Voice over WiFi (VoWiFi) manner, and is configured to carry the first service of the first subscriber identity card.
In some embodiments, the first subscriber identity card performing the first service through the new data path includes: and transmitting service data in the first service between the first subscriber identity card and the first home network through the ePDG network element. Specifically, the ePDG network element sends the service data to a first IMS core network (IMS1 core network) corresponding to the first subscriber identity card through a first PGW (PGW1) in the first home network, and in the opposite direction, sends the service data from the IMS1 core network to the PGW1, and then sends the service data to the IMS module of the first subscriber identity card through the ePDG network element, so that the first subscriber identity card accesses the first home network to perform the first service.
In some embodiments, the service processing method of the mobile terminal further includes: and if the switching requirement does not exist any more, the first subscriber identity module card is switched back to the first connection to carry out the first service. Therefore, compared with the first service performed by the second connection of the second subscriber identity card, the first service performed by the first subscriber identity card using the first connection thereof under the condition of no switching requirement can improve the communication quality.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. The device comprises a memory 11 and a processor 12, wherein the memory 11 stores a computer program which can run on the processor 12, the computer program stored on the memory 11 is a program for implementing steps in the service processing method, and the steps are implemented when the processor 12 executes the program. The memory 11 may include: ROM, RAM, magnetic or optical disks, and the like. The steps include: when a switching requirement exists, the first subscriber identity module card adopts a second connection of the second subscriber identity module card to establish a new data path; the first subscriber identity module card carries out a first service through the new data path; the first subscriber identity module card and the second subscriber identity module card are located in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection.
In some embodiments, the establishing, by the first subscriber identity card, the new data path using the second connection of the second subscriber identity card comprises: the first user identification card accesses the internet in a 3GPP wireless access mode by adopting the second connection of the second user identification card and is connected with an ePDG network element of a first home network; the first user identification card establishes an IPSec tunnel connected with the ePDG network element as a new data path; and the first home network is a home network corresponding to the first subscriber identity card.
In some embodiments, the IPSec tunnel is established by a VoWiFi method, and is used to carry the first service of the first subscriber identity card.
In some embodiments, the first subscriber identity card accesses the first home network through the IPSec tunnel.
In some embodiments, the first subscriber identity card performing the first service through the new data path includes: and transmitting service data in the first service between the first subscriber identity card and the first home network through the ePDG network element.
In some embodiments, the first service comprises an IMS service.
In some embodiments, the IMS services include: registration, voice call, video call, and short message service.
In some embodiments, the second traffic comprises data traffic.
In some embodiments, the first subscriber identity card having a handover requirement comprises: the first subscriber identity module card cannot perform a first service through a first connection thereof.
In some embodiments, the first subscriber identity card being unable to perform the first service via its first connection comprises: the second subscriber identity card is performing a first service.
In some embodiments, the first subscriber identity card having a handover requirement comprises: the signal quality of the first subscriber identity card is lower than a signal threshold or the first subscriber identity card is in a roaming state.
In some embodiments, the method further comprises: and if the switching requirement does not exist any more, the first subscriber identity module card is switched back to the first connection thereof to carry out the first service.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (24)
1. A service processing method of a mobile terminal is characterized by comprising the following steps:
when a first user identification card has a switching requirement, the first user identification card adopts a second connection of a second user identification card to establish a new data path; and
the first subscriber identity module card carries out a first service through the new data path;
the first subscriber identity module card and the second subscriber identity module card are positioned in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection;
the first connection and the second connection are wireless connections between the mobile terminal and a home network; the data path is as follows: and the mobile terminal is internally connected with a path established when the mobile terminal is accessed to the home network through wireless connection.
2. The service processing method according to claim 1, wherein the establishing, by the first subscriber identity card, the new data path using the second connection of the second subscriber identity card comprises:
the first user identification card accesses the internet in a 3GPP wireless access mode by adopting the second connection of the second user identification card and is connected with an ePDG network element of a first home network; and
the first user identification card establishes an IPSec tunnel connected with the ePDG network element as a new data path;
and the first home network is a home network corresponding to the first subscriber identity card.
3. The service processing method according to claim 2, wherein the IPSec tunnel is established by VoWiFi, and is used to carry the first service of the first subscriber identity card.
4. The traffic processing method according to claim 2, wherein the first subscriber identity card accesses the first home network through the IPSec tunnel.
5. The service processing method of claim 2, wherein the first subscriber identity card performing the first service through the new data path comprises:
and transmitting service data in the first service between the first subscriber identity card and the first home network through the ePDG network element.
6. The service processing method according to claim 1, wherein the first service includes an IMS service.
7. The service processing method according to claim 6, wherein the IMS service includes: registration, voice call, video call, and short message service.
8. The traffic processing method according to claim 1, wherein the second traffic comprises data traffic.
9. The service processing method according to claim 1, wherein the first subscriber identity card having a handover requirement comprises: the first subscriber identity card is unable to perform a first service via its first connection.
10. The service processing method of claim 9, wherein the first subscriber identity card being unable to perform the first service through its first connection comprises: the second subscriber identity card is performing a first service.
11. The service processing method according to claim 1, wherein the first subscriber identity card having a handover requirement comprises:
the signal quality of the first subscriber identity card is lower than a signal threshold or the first subscriber identity card is in a roaming state.
12. The traffic processing method according to claim 1, further comprising: and if the switching requirement does not exist any more, the first subscriber identity module card is switched back to the first connection thereof to carry out the first service.
13. A mobile terminal comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor when executing the program performs steps comprising:
when a switching requirement exists, the first subscriber identity module card adopts a second connection of the second subscriber identity module card to establish a new data path; and
the first subscriber identity module card carries out a first service through the new data path;
the first subscriber identity module card and the second subscriber identity module card are positioned in the same mobile terminal, and the second subscriber identity module card performs a first service through a first connection and performs a second service through a second connection;
the first connection and the second connection are wireless connections between the mobile terminal and a home network;
the data path is as follows: and the mobile terminal is internally connected with a path established when the mobile terminal is accessed to the home network through wireless connection.
14. The mobile terminal of claim 13, wherein the first subscriber identity card establishing the new data path using the second connection of the second subscriber identity card comprises:
the first user identification card accesses the internet in a 3GPP wireless access mode by adopting the second connection of the second user identification card and is connected with an ePDG network element of a first home network; and
the first user identification card establishes an IPSec tunnel connected with the ePDG network element as a new data path;
and the first home network is a home network corresponding to the first subscriber identity card.
15. The mobile terminal of claim 14, wherein the IPSec tunnel is established via VoWiFi for carrying the first service of the first subscriber identity card.
16. The mobile terminal of claim 14, wherein the first subscriber identity card accesses the first home network through the IPSec tunnel.
17. The mobile terminal of claim 14, wherein the first subscriber identity card performing the first service via the new data path comprises:
and transmitting service data in the first service between the first subscriber identity card and the first home network through the ePDG network element.
18. The mobile terminal of claim 13, wherein the first service comprises an IMS service.
19. The mobile terminal of claim 18, wherein the IMS service comprises: registration, voice call, video call, and short message service.
20. The mobile terminal of claim 13, wherein the second service comprises a data service.
21. The mobile terminal of claim 13, wherein the first subscriber identity card having a handover requirement comprises: the first subscriber identity card is unable to perform a first service via its first connection.
22. The mobile terminal of claim 21, wherein the first subscriber identity card being unable to perform the first service through its first connection comprises: the second subscriber identity card is performing a first service.
23. The mobile terminal of claim 13, wherein the first subscriber identity card having a handover requirement comprises:
the signal quality of the first subscriber identity card is lower than a signal threshold or the first subscriber identity card is in a roaming state.
24. The mobile terminal of claim 13, further comprising: and if the switching requirement does not exist any more, the first subscriber identity module card is switched back to the first connection to carry out the first service.
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