CN112601224B

CN112601224B - Call switching method, device and system

Info

Publication number: CN112601224B
Application number: CN202011395433.3A
Authority: CN
Inventors: 刘钧; 杨河山
Original assignee: Hytera Communications Corp Ltd
Current assignee: Hytera Communications Corp Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2023-02-10
Anticipated expiration: 2040-12-03
Also published as: CN112601224A

Abstract

The invention provides a call switching method, a device and a system, wherein a mobile terminal acquires own operation data when detecting that the mobile terminal is disconnected with a first service server of a first network, switches to a second network based on the operation data, and establishes connection with a second service server of the second network; sending a call signaling to a second service server; the mobile terminal acquires call response information fed back by the second service server; and if the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information. In the scheme, when receiving a call signaling sent by a mobile terminal, a second service server authenticates a registration authentication code carried by the call signaling based on a registration authentication code received periodically to determine whether the mobile terminal can use a new network. And when the authentication result is determined to be successful, determining that the mobile terminal can use a new network. By the method, the switching time of the network can be reduced.

Description

Call switching method, device and system

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a call handover method, apparatus, and system.

Background

Currently, with the rapid development of the mobile communication industry, the demand for making a call through a mobile terminal is increasing. The mobile terminal needs to talk or communicate under a broadband or narrowband network.

In the prior art, in the process of talkback or communication of a mobile terminal in a broadband or narrowband network, if it is detected that a network of a current group call is in a disconnected state, the group call of the current network is disconnected. At this time, the mobile terminal needs to switch the network of the current group call to a new network, for example: the broadband network switches to the narrowband network. Due to the network switching of the mobile terminal, a registration request needs to be initiated to a new network so that the new network can re-register the mobile terminal, and after the registration is successful, a server of the new network accesses the mobile terminal to a call mode in a late entry mode. Resulting in a long time for network handover and poor user experience.

Disclosure of Invention

In view of this, embodiments of the present invention provide a call handover method, device and system, so as to solve the problems in the prior art that network handover time is long and call experience of a user is poor.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

the first aspect of the embodiment of the invention discloses a call switching method, which is applied to a mobile terminal and comprises the following steps:

the method comprises the steps that when the mobile terminal detects that the mobile terminal is disconnected with a first service server of a first network, the mobile terminal obtains operation data of the mobile terminal, switches to a second network based on the operation data, and establishes connection with a second service server of the second network, wherein the first service server and the second service server receive registration authentication codes issued periodically by an authentication center, and the registration authentication codes are bound with unique terminal information of the mobile terminal;

the mobile terminal sends a call signaling to the second service server, the call signaling indicates the mobile terminal to initiate a group call to other terminals, and the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal;

the mobile terminal acquires call response information fed back by the second service server, wherein the call response information comprises an authentication result obtained by the second service server authenticating the registered authentication code based on the periodically received registered authentication code;

and if the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information.

The second aspect of the embodiment of the invention discloses a call switching method, which is applied to a second service server and comprises the following steps:

the second service server acquires a call signaling sent by the mobile terminal, wherein the call signaling carries a registration authentication code corresponding to the mobile terminal;

the second service server authenticates the registered authentication code based on the registered authentication code sent by the authentication center which is received last time at present to obtain an authentication result;

and generating call response information based on the authentication result, and feeding the call response information back to the mobile terminal.

The third aspect of the embodiments of the present invention discloses a call switching device, which is applied to a mobile terminal, and the device includes:

the system comprises a switching unit, a first service server and a second service server, wherein the switching unit is used for acquiring self operation data when detecting that the first service server is disconnected with the first service server of a first network, switching to a second network based on the operation data, and establishing connection with the second service server of the second network;

a first sending unit, configured to send a call signaling to the second service server, where the call signaling indicates the mobile terminal to initiate a group call to another terminal, and the call signaling carries a registration authentication code corresponding to registration information of the mobile terminal;

an obtaining unit, configured to obtain call response information fed back by the second service server, where the call response information includes an authentication result obtained by authenticating, by the second service server, the registration authentication code based on the registration authentication code received periodically;

and the updating unit is used for updating the calling state and the registration state of the mobile terminal based on the calling response information if the mobile terminal determines that the authentication result is successful.

The fourth aspect of the present invention discloses a call switching apparatus, which is applied to a second service server, and the apparatus includes:

a second sending unit, configured to obtain a call signaling sent by a mobile terminal, where the call signaling carries a registration authentication code corresponding to the mobile terminal;

the authentication unit is used for authenticating the registration authentication code based on the registration authentication code sent by the authentication center which is received at the last time at present to obtain an authentication result;

and the generating unit is used for generating call response information based on the authentication result and feeding the call response information back to the mobile terminal.

The fifth aspect of the embodiment of the invention discloses a call switching system, which comprises a mobile terminal, a first service server, a second service server and an authentication center;

the mobile terminal is used for acquiring self operation data when detecting that the mobile terminal is disconnected with a first service server of a first network, switching to a second network based on the operation data, and establishing connection with a second service server of the second network, wherein the first service server and the second service server receive a registration authentication code periodically issued by an authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal; sending a call signaling to the second service server, wherein the call signaling indicates the mobile terminal to initiate a group call to other terminals, and the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal; acquiring call response information fed back by the second service server, wherein the call response information comprises an authentication result obtained by the second service server authenticating the registered authentication code based on the periodically received registered authentication code; if the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information;

the first service server is used for receiving the registration authentication code periodically issued by the authentication center;

the second service server is used for receiving the registration authentication code periodically issued by the authentication center and acquiring a call signaling sent by the mobile terminal, wherein the call signaling carries the registration authentication code corresponding to the mobile terminal; the second service server authenticates the registered authentication code based on the registered authentication code sent by the authentication center which is received last time at present to obtain an authentication result; generating call response information based on the authentication result, and feeding back the call response information to the mobile terminal;

the authentication center is used for periodically sending the registration authentication code bound with the unique terminal information of the mobile terminal to the mobile terminal, the first service server and the second service server.

Based on the method, the device and the system for call switching provided by the embodiment of the invention, the method comprises the following steps: when detecting that the connection with a first service server of a first network is disconnected, acquiring self operation data, switching to a second network based on the operation data, and establishing connection with a second service server of the second network, wherein the first service server and the second service server receive a registration authentication code periodically issued by an authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal; sending a call signaling to a second service server, wherein the call signaling indicates the mobile terminal to initiate a group call to other terminals, and the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal; the mobile terminal acquires call response information fed back by the second service server, wherein the call response information comprises an authentication result obtained by the second service server authenticating the registered authentication code based on the periodically received registered authentication code; and if the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information. In the embodiment of the invention, the mobile terminal does not need to register in a new network again. And when the current network connected with the mobile terminal is disconnected, the mobile terminal is switched to a second network based on the operation data of the mobile terminal and is connected with a second service server of the second network. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, the mobile terminal can use a new network, and the mobile terminal updates and displays the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an application architecture diagram of a mobile terminal, a first service server and an authentication center according to an embodiment of the present invention;

fig. 2 is an application architecture diagram of a mobile terminal, a first service server, a second service server and an authentication center according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a call handover method according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating another call handover method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating another call handover method according to an embodiment of the present invention;

fig. 6 is an interaction diagram applied to a call handover method according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a call handover apparatus according to an embodiment of the present invention;

fig. 8 is a schematic flowchart of another call handover apparatus according to an embodiment of the present invention;

fig. 9 is a flowchart of another call handover apparatus according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a call handover system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. And when the current network connected with the mobile terminal is disconnected, the mobile terminal is switched to a second network based on the operation data of the mobile terminal and is connected with a second service server of the second network. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the periodically received registration authentication code so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, the mobile terminal can use a new network, and the mobile terminal updates and displays the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

The processing process for realizing the call switching provided by the invention comprises the following steps:

as shown in fig. 1, a mobile terminal currently establishes a connection with a first service server of a first network, and at this time, the mobile terminal may initiate a group call to other mobile terminals through the first network.

The mobile terminals include a mobile terminal 11, a mobile terminal 12, a mobile terminal 13, a mobile terminal 14, a mobile terminal 15 and a mobile terminal 16. The first service server is a first service server 17 and the authentication center is an authentication center 18.

If the mobile terminal 11 is already registered in the first service server 17, so as to determine that the mobile terminal 11 can use the first network, the first service server 17 of the first network can receive the registration authentication code corresponding to the mobile terminal 11 periodically issued by the authentication center 18, that is, the authentication code of the registered mobile terminal periodically issued by the authentication center 18 and received by the first service server 17 of the first network includes the registration authentication code of the mobile terminal 11.

It should be noted that the first network may be a broadband network or a narrowband network.

When detecting that the signal state of the first network is no signal, the mobile terminal 11 determines that the mobile terminal is disconnected from the first service network, and at this time, disconnects group calling with other mobile terminals, and acquires its own operating data.

The mobile terminal 11 switches to the second network based on the operation data so that the mobile terminal 11 establishes a connection with a second service server 19 of the second network, as shown in fig. 2. Wherein the second service server 19 shares the authentication center 18 with the first service server 17.

It should be noted that the second network may also be a broadband network or a narrowband network, and the second network is different from the first network. For example, the first network is a broadband network and the second network is a narrowband network; or the first network is an LTE network and the second network is a WLAN network.

The second service server 19 receives the authentication code of the registered mobile terminal periodically issued by the authentication center 18, and the authentication code of the registered mobile terminal includes the registration authentication code of the mobile terminal 11.

It should be noted that the registration authentication codes of the mobile terminal 11 received by the second service server 19 and the first service server 17 are identical.

Wherein the registration authentication code for allowing the service server to uniquely identify the mobile terminal 11 is bound with unique terminal information of the mobile terminal 11.

When initiating a call to the mobile terminal 16, the mobile terminal 11 sends a call signaling to the second service server 19, where the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal 11.

The second service server 19 obtains the call signaling sent by the mobile terminal 11.

The second service server 19 authenticates the registration authentication code corresponding to the registration information of the mobile terminal 11 based on the last received registration authentication code issued by the authentication center 18, and obtains an authentication result.

Alternatively, the registration authentication code may be fixed or may be periodically changed. In order to ensure the security of the registration authentication code, the registration authentication code issued by the authentication center 18 changes periodically, and specifically, the authentication center 18 updates the registration authentication code corresponding to the registration information of the mobile terminal 11 according to a certain period.

Wherein, the period of updating the registered authentication code by the authentication center 18 is the same as the period of periodically issuing the authentication code by the authentication center 18.

It should be noted that each registration authentication code that changes periodically is bound with the unique terminal information of the mobile terminal 11, but when the authentication center 18 issues the registration authentication code of the mobile terminal 11 updated for the nth time, the registration authentication code of the mobile terminal 11 issued for the nth-1 st time is invalid.

Wherein, the value of N is a positive integer which is more than or equal to 1.

If the authentication result indicates that the authentication is successful, the second service server 19 accesses the mobile terminal 11 to the group call with the mobile terminal 16 based on the authentication result.

The second service server 19 also generates call response information based on the authentication result and feeds the call response information back to the mobile terminal 11.

The mobile terminal 11 obtains the call response information fed back by the second service server 19.

The call response message includes an authentication result obtained by the second service server 19 authenticating the registration authentication code based on the periodically received registration authentication code.

If the mobile terminal 11 determines that the authentication result is successful, it indicates that the mobile terminal 11 has successfully switched to the second network, and at this time, the call state and the registration state of the mobile terminal 11 are updated based on the call response information.

The mobile terminal shown in the embodiment of the present invention may be: devices having a communication function, such as handheld devices, portable devices, tablet devices, and intercom devices.

It should be noted that, other terminals such as the mobile terminal 12, the mobile terminal 13, the mobile terminal 14, and the mobile terminal 15 all detect the signal state of the network connected to the mobile terminal in real time, and when any mobile terminal such as the mobile terminal 12, the mobile terminal 13, the mobile terminal 14, and the mobile terminal 15 detects that the signal state of the network connected to the mobile terminal is no signal, the method for performing call handover is the same as the process for performing call handover by the mobile terminal 11, which can be referred to each other.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. And when the current network connected with the mobile terminal is disconnected, the mobile terminal is switched to a second network based on the operation data of the mobile terminal and is connected with a second service server of the second network. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, the mobile terminal can use a new network, and the mobile terminal updates and displays the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be shortened, and the conversation experience of a user can be improved.

Based on the processing architecture disclosed in the embodiment of the present invention, referring to fig. 3, a schematic flow chart of a call handover method provided in the embodiment of the present invention is shown, where the method is applicable to a mobile terminal, and the method includes:

step S301: and when detecting that the mobile terminal is disconnected with a first service server of the first network, the mobile terminal acquires the operation data of the mobile terminal, switches to a second network based on the operation data, and establishes connection with a second service server of the second network.

In step S301, the first service server and the second service server receive a registration authentication code of a registered mobile terminal periodically issued by the authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal.

In the process of implementing step S301 specifically, when the mobile terminal detects that the signal state of the first network is no signal, it indicates that the mobile terminal disconnects itself from the first service server of the first network. The mobile terminal acquires the own operation data in real time so as to switch the first network to the second network by using the own operation data, so that the mobile terminal establishes connection with a second service server of the second network.

It should be noted that the first network and the second network are narrowband networks or broadband networks. Thus, the switching of the first network to the second network may be a switching of a broadband network to a narrowband network, or a switching of a narrowband network to a broadband network.

The operational data includes signal strength.

Optionally, before determining that the first service server of the first network is disconnected, the mobile terminal further includes the following steps:

step S11: the mobile terminal sends registration information to the first service server.

In step S11, the registration information is used to indicate an identifier, such as a mobile phone number or an ID number, that uniquely identifies the mobile terminal.

Optionally, the first service server receives registration information sent by the mobile terminal, registers the mobile terminal based on the registration information, and sends the registration information of the mobile terminal to the authentication center after the registration is successful.

When the authentication center receives the registration information sent by the first service server, the authentication center generates a registration authentication code based on the registration information and periodically sends the registration authentication code to the mobile terminal and the first service server, so that the mobile terminal continues to execute step S12.

It should be noted that the mobile terminal uses the same registration information in the first network and the second network, that is, the mobile terminal has the same dual-mode number, for example, the same mobile phone number, so that when the mobile terminal establishes a connection with the second service server of the second network, the second service server may also obtain the registration authentication code corresponding to the registration information of the mobile terminal periodically by the authentication center.

The registration authentication code is used to uniquely identify the mobile terminal.

The periodicity is set by one skilled in the art based on a number of experiments, for example, it may be set to 1 day.

Step S12: and acquiring and storing the registration authentication code corresponding to the registration information, which is received by the first service server from the authentication center.

In the process of implementing step S12, the mobile terminal obtains the registration authentication code periodically issued by the authentication center through the first service server, and updates the registration authentication code stored in the mobile terminal.

It should be noted that the registration authentication code stored in the mobile terminal itself refers to the original registration authentication code of the mobile terminal or the registration authentication code periodically received last time and stored in the mobile terminal.

Optionally, in order to ensure the security of the registration authentication code, when the first service server receives the registration authentication code corresponding to the registration information and periodically issued by the authentication center, the first service server binds the registration information of the mobile terminal with the registration authentication code.

Step S302: and the mobile terminal sends a call signaling to the second service server.

In step S302, the call signaling instructs the mobile terminal to initiate a group call to another terminal, where the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal.

In the process of implementing step S302, when the mobile terminal initiates a call to another mobile terminal through the second service server, the mobile terminal sends a call signaling carrying the self-registered authentication code to the second service server.

It should be noted that call signaling is used for transmission in the communication network to ensure efficient and reliable transmission of the registration authentication code.

Step S303: and acquiring the call response information fed back by the second service server.

In step S303, the call response message includes an authentication result obtained by the second service server authenticating the registration authentication code based on the registration authentication code received periodically.

It should be noted that the authentication result includes an authentication result indicating that the authentication is successful, and an authentication result indicating that the authentication is failed.

Optionally, the second service server receives the registration authentication code sent by the mobile terminal and carrying the registration authentication code corresponding to the mobile terminal, and receives the registration authentication code periodically issued by the authentication center. And then, authenticating the registered authentication code based on the registered authentication code issued by the authentication center received last time to obtain an authentication result. When the authentication result is used for indicating that the authentication is successful, the second service server accesses the mobile terminal to the group call with other mobile terminals based on the authentication result so that the mobile terminal can communicate with other terminals, generates call response information based on the authentication result indicating that the authentication is successful, and feeds the call response information back to the mobile terminal; when the authentication result is used for indicating that the authentication fails, the second service server refuses the mobile terminal to access the group call with other mobile terminals based on the authentication result, so that the mobile terminal cannot communicate with other terminals; and generating call response information according to the authentication result indicating the authentication failure, and feeding back the call response information to the mobile terminal.

It should be noted that the communication information of the mobile terminal accessing the group call with other mobile terminals is generated by the second service server based on the group call with other mobile terminals accessing the mobile terminal.

After the mobile terminal receives the call response information fed back by the second service server, the steps S304 and S305 are continuously performed.

Step S304: the mobile terminal determines whether the authentication result is successful, if the authentication result is successful, the step S305 is executed, and if the authentication result is failed, the call failure information is displayed based on the call response information.

It should be noted that the call failure information is used to indicate that the current mobile terminal cannot use the second network for a call.

In the process of implementing the step S304 specifically, the mobile terminal determines whether the authentication result is successful, if the authentication result is successful, it indicates that the mobile terminal is successfully registered in the second network, and the mobile terminal can initiate a call to another terminal through the second network, at this time, step S305 is executed, if it is determined that the authentication result is failed, it indicates that the mobile terminal is failed to register in the second network, and the mobile terminal cannot initiate a call to another terminal through the second network, at this time, the mobile terminal displays call failure information based on the call response information, so that the user can initiate a call to another terminal through the second network again based on the call failure information, that is, step S302 is executed.

Step S305: and updating the call state and the registration state of the mobile terminal based on the call response information.

In the process of implementing the step S305 specifically, the mobile terminal updates its own call state to available based on the authentication result indicating that the authentication is successful, updates its own registration state to successful registration, and displays the call state and the registration state.

Optionally, after step S305 is executed, the call handover method shown based on the foregoing embodiment of the present invention further includes:

and the mobile terminal receives and stores the registration authentication code periodically issued by the authentication center through the second service server.

Optionally, when the authentication result is determined to be that the authentication is successful, it indicates that the mobile terminal may use the second network, and at this time, the authentication center periodically issues, to the mobile terminal through the second service server, the registration authentication code corresponding to the registration information of the mobile terminal.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. And when the current network connected with the mobile terminal is disconnected, the mobile terminal is switched to a second network based on the operation data of the mobile terminal and is connected with a second service server of the second network. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, the mobile terminal can use a new network, and the mobile terminal updates and displays the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

Based on the call handover method shown in fig. 3 in the foregoing embodiment of the present invention, the embodiment of the present invention further shows a flowchart of another call handover method, and as shown in fig. 4, the method includes:

step S401: and when the mobile terminal detects that the mobile terminal is disconnected with a first service server of a first network, the mobile terminal acquires the operation data of the mobile terminal.

It should be noted that the specific implementation process of step S401 is the same as the specific implementation process of step S301, and reference may be made to this.

Step S402: the mobile terminal determines whether the signal strength in the operation data satisfies the signal strength required for switching to the second network, if so, executes step S403, and if not, continues to execute step S402.

In the process of specifically implementing step S402, in order to ensure that the switched second network can enable the service of the mobile terminal itself, such as a call service, to operate normally, it is necessary to determine whether the signal strength in the operating data of the mobile terminal itself meets the signal strength required for switching to the second network, if yes, step S403 is executed, and if not, step S402 is executed by continuing to determine whether the signal strength in the operating data meets the signal strength required for switching to the second network based on the operating data acquired in real time.

Step S403: and switching to the second network based on the operation data, and establishing connection with a second service server of the second network.

In step S403, the first service server and the second service server receive a registration authentication code periodically issued by the authentication center, where the registration authentication code is bound with unique terminal information of the mobile terminal.

Step S404: and when the mobile terminal initiates a call to other mobile terminals, sending a call signaling to the second service server.

In step S404, the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal.

Step S405: and acquiring the call response information fed back by the second service server.

In step S405, the call response message includes an authentication result obtained by the second service server authenticating the registration authentication code based on the registration authentication code received periodically.

Step S406: the mobile terminal determines whether the authentication result is successful, if the authentication result is successful, step S407 is executed, and if the authentication result is failed, call failure information is displayed based on the call response information.

Step S407: and updating the call state and the registration state of the mobile terminal based on the call response information.

It should be noted that the specific implementation process of step S403 to step S407 is the same as the specific implementation process of step S301 to step S305, and reference may be made to this embodiment without description.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. When the fact that the current network connected with the mobile terminal is disconnected is determined, the mobile terminal is switched to the second network based on the own operation data and connected with the second service server of the second network when the fact that the signal intensity in the own operation data meets the signal intensity needed by switching to the second network is determined. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, indicating that the mobile terminal can use a new network, and updating and displaying the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

Based on the processing architecture disclosed in the embodiment of the present invention, referring to fig. 5, a schematic flow chart of a call handover method provided in the embodiment of the present invention is shown, where the method is applied to a second service server, and the method includes:

step S501: and the second service server acquires the call signaling sent by the mobile terminal.

In step S501, the call signaling carries a registration authentication code corresponding to the mobile terminal.

In the specific implementation process of step S501, the second service server obtains the call signaling carrying the registration authentication code corresponding to the mobile terminal.

Step S502: and the second service server authenticates the registration authentication code based on the last received registration authentication code issued by the authentication center to obtain an authentication result.

In the process of implementing step S502 specifically, the second service server receives the registration authentication code issued periodically by the authentication center, and authenticates the registration authentication code carried in the call signaling based on the registration authentication code issued by the authentication center that is received last time at present, so as to obtain an authentication result indicating that the authentication is successful or indicating that the authentication is failed.

Step S503: and generating call response information based on the authentication result, and feeding the call response information back to the mobile terminal.

In the process of implementing step S503 specifically, if the authentication result is the authentication result indicating that the authentication is successful, the second service server generates, based on the authentication result indicating that the authentication is successful, call response information carrying an indication that the registration state of the mobile terminal is successful and the call state is available, and feeds the call response information back to the mobile terminal.

And if the authentication result is the authentication result indicating the authentication failure, the second service server generates call response information carrying the call failure information based on the authentication result indicating the authentication failure and feeds the call response information back to the mobile terminal.

In the embodiment of the invention, when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically, so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, indicating that the mobile terminal can use the new network. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

Based on the above-mentioned call handover method shown in fig. 5 in the embodiment of the present invention, in the step S502, the second service server authenticates the registration authentication code based on the registration authentication code issued by the authentication center that is received last time, so as to obtain an authentication result, including the following steps:

step S21: and the second service server receives the registration authentication code periodically issued by the authentication center.

In the process of implementing step S21, since the mobile terminal establishes a connection with the second service server of the second network, the second service server may receive the registration authentication code corresponding to the registration information of the mobile terminal, which is periodically issued by the authentication center.

Optionally, the authentication center generates a registration authentication code uniquely corresponding to the registration information based on the registration information of the mobile terminal sent by the first service server, and periodically issues the registration authentication code to the mobile terminal.

Step S22: and judging whether the registration authentication code carried by the call signaling is matched with the registration authentication code which is received from the authentication center at the last time, if so, executing the step S23, and if not, executing the step S24.

In the process of implementing step S22 specifically, the second service server compares whether the registration authentication code carried in the call signaling is consistent with the registration authentication code received from the authentication center last time, if so, it indicates that the authentication is successful, and executes step S23, and if not, it indicates that the authentication is failed, and executes step S24.

Step S23: and generating an authentication result indicating successful authentication based on the matching information of the registration authentication code carried by the call signaling and the registration authentication code received at the last time.

In the process of implementing step S23, the second service server generates an authentication result indicating that the authentication is successful when it is determined that the registration authentication code carried in the call signaling is consistent with the registration authentication code received from the authentication center last time.

Step S24: and generating an authentication result indicating authentication failure based on the unmatched information of the registration authentication code carried by the call signaling and the currently and last received registration authentication code.

In the process of implementing step S24, when determining that the registration authentication code carried in the call signaling is inconsistent with the registration authentication code received from the authentication center last time, the second service server generates an authentication result indicating that the authentication has failed.

In the embodiment of the invention, when receiving the call signaling sent by the mobile terminal, the second service server judges whether the registration authentication code received periodically is consistent with the registration authentication code carried by the call signaling, so as to determine whether the mobile terminal can use a new network according to the authentication result. When the registration authentication code received periodically is determined to be consistent with the registration authentication code carried by the call signaling, the mobile terminal is indicated to be capable of using the new network. By the method, the switching time of the network can be shortened, and the conversation experience of a user can be improved.

Based on the above-mentioned call handover method shown in fig. 5 in the embodiment of the present invention, before executing step S503 to generate call response information based on the authentication result, the method further includes the following steps:

step S31: and determining whether the authentication result indicates successful authentication, if the authentication result indicates successful authentication, executing the step S32, and if the authentication result indicates failed authentication, executing the step S33.

In the specific implementation of step S31, it is determined whether the authentication result indicates that the authentication is successful or failed, if the authentication result indicates that the authentication is successful, step S32 is executed, and if the authentication result indicates that the authentication is failed, step S33 is executed.

Step S32: and accessing the mobile terminal into the group call with other mobile terminals based on the authentication result indicating the successful authentication.

In the process of implementing step S32 specifically, when it is determined that the authentication result indicates that the authentication is successful, it indicates that the second service server allows the mobile terminal to use the second network, and at this time, the second service server responds to a call sent by the mobile terminal to another mobile terminal, and accesses the mobile terminal to a group call with another mobile terminal, so that the mobile terminal makes a call with another mobile terminal.

Step S33: and rejecting the mobile terminal to access the group call with other terminals based on the authentication result indicating the authentication failure.

In the process of implementing step S33 specifically, when it is determined that the authentication result indicates that the authentication fails, it indicates that the second service server does not allow the mobile terminal to use the second network, and at this time, the second service server does not respond to the call sent by the mobile terminal to another terminal, and rejects the mobile terminal to access the group call with another terminal, so that the mobile terminal cannot talk with another terminal.

In the embodiment of the invention, when receiving the call signaling sent by the mobile terminal, the second service server judges whether the registration authentication code received periodically is consistent with the registration authentication code carried by the call signaling, so as to determine whether the mobile terminal can use a new network according to the authentication result. When the registration authentication code received periodically is determined to be consistent with the registration authentication code carried by the call signaling, the mobile terminal can use a new network, and the mobile terminal is accessed to the group call of other mobile terminals at the moment. When the registration authentication code received periodically is determined to be inconsistent with the registration authentication code carried by the call signaling, the mobile terminal can not use a new network, and the mobile terminal is refused to access the group call with other mobile terminals at the moment. By the method, the switching time of the network can be shortened, and the conversation experience of a user can be improved.

Based on the call handover method shown in the above embodiment of the present invention, the present invention also correspondingly discloses an interactive schematic diagram applied to the call handover method, as shown in fig. 6, the method includes:

s601: the mobile terminal sends registration information to the first service server.

S602: the first service server receives the registration information sent by the mobile terminal, registers the mobile terminal based on the registration information, and sends the registration information of the mobile terminal to the authentication center after the registration is successful.

S603: when the authentication center receives the registration information sent by the first service server, the authentication center generates a registration authentication code based on the registration information and periodically sends the registration authentication code to the mobile terminal through the first service server.

S604: when detecting that the mobile terminal is disconnected with a first service server of a first network, the mobile terminal acquires the operation data of the mobile terminal, switches to a second network based on the operation data, and establishes connection with a second service server of the second network.

It should be noted that, because the mobile terminal establishes a connection with the second service server of the second network, the second service server may also receive the registration authentication code corresponding to the registration information of the mobile terminal, which is periodically issued by the authentication center.

S605, when the mobile terminal initiates the group calling to other mobile terminals, the mobile terminal sends a calling signaling to the second service server.

S606: and the second service server acquires the call signaling sent by the mobile terminal. And authenticating the registered authentication code based on the registered authentication code issued by the authentication center which is received last time at present to obtain an authentication result.

And S607, the second service server generates call response information based on the authentication result and feeds the call response information back to the mobile terminal.

S608: and when the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information.

S609: and the mobile terminal receives and stores the registration authentication code periodically issued by the authentication center through the second service server.

In order to better understand the call handover method disclosed in the above embodiment of the present invention, a specific application example is explained below.

Suppose that the first network is a broadband network, the second network is a narrowband network, the mobile phone number of the mobile terminal a is 11111111111, the signal strength in the operation data is-45 milliwatt decibels, and the signal strength required by the second network is-40 to-80 milliwatt decibels.

The mobile terminal A sends registration information carrying the mobile phone number 11111111111 to the broadband network, and a first service server of the broadband network registers the mobile terminal A based on the mobile phone number 11111111111.

And after the first service server successfully registers the mobile terminal A, sending the registration information carrying the mobile phone number 11111111111 to the authentication center.

The authentication center generates a registration authentication code Q based on the mobile phone number 11111111111 and sends the registration authentication code Q to the mobile terminal A through the first service server. At this time, the mobile terminal a can normally initiate a call to the mobile terminal B through the broadband network.

When the mobile terminal A is communicated with other mobile terminals, the signal state of the broadband network is detected in real time, and when the mobile terminal A is determined to be disconnected with a first service server of the broadband network, the mobile terminal A cuts off the communication with the mobile terminal B at the moment and obtains the running data of the mobile terminal A.

And the mobile terminal A determines that the signal intensity of-45 mW dB in the operation data meets the signal intensity of-40 to-80 mW dB required by switching to the narrowband network, and the mobile terminal A switches the broadband network to the narrowband network so as to enable the mobile terminal to establish connection with a second service server of the narrowband network.

It should be noted that the mobile terminal a uses the same mobile phone number in the broadband network and the narrowband network, so that the second service server may also receive the registration authentication code corresponding to the registration information of the mobile terminal periodically issued by the authentication center, and at this time, it is determined that the registration authentication code that is issued by the authentication center and is currently received by the second service server for the last time is Q.

When the mobile terminal A initiates a call to the mobile terminal B through the second service server, a call signaling carrying the self-registration authentication code Q is sent to the second service server.

The second service server determines that the registration authentication code Q carried by the call signaling is consistent with the registration authentication code Q which is sent by the authentication center at the last time, generates an authentication result indicating that the authentication is successful, responds to the call sent by the mobile terminal A to the mobile terminal B, and accesses the mobile terminal A to the group call of the mobile terminal B, so that the mobile terminal A and the mobile terminal B can communicate.

The second service server generates call response information based on the authentication result indicating the successful authentication, and feeds the call response information back to the mobile terminal A.

The mobile terminal A determines that the authentication result in the call response information is successful, updates the call state of the mobile terminal A to be available based on the authentication result indicating successful authentication, updates the registration state of the mobile terminal A to be successful, and displays the call state and the registration state.

After the authentication center determines that the mobile terminal can use the narrowband network, the authentication center periodically issues a registration authentication code corresponding to the mobile phone number 11111111111 of the mobile terminal a to the mobile terminal a through the second service server.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. And when the current network connected with the mobile terminal is disconnected, the mobile terminal is switched to a second network based on the operation data of the mobile terminal and is connected with a second service server of the second network. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the periodically received registration authentication code so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, the mobile terminal can use a new network, and the mobile terminal updates and displays the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be shortened, and the conversation experience of a user can be improved.

Corresponding to the call handover method shown in fig. 3 in the embodiment of the present invention, an embodiment of the present invention also discloses a call handover apparatus, as shown in fig. 7, which is suitable for a mobile terminal, and the apparatus includes:

the switching unit 701 is configured to acquire operation data of the switching unit when detecting that the switching unit is disconnected from the first service server of the first network, switch to the second network based on the operation data, and establish connection with the second service server of the second network.

It should be noted that, the first service server and the second service server receive the registration authentication code periodically issued by the authentication center, and the registration authentication code is bound with the unique terminal information of the mobile terminal.

A first sending unit 702, configured to send a call signaling to the second service server.

It should be noted that the call signaling instructs the mobile terminal to initiate a group call to another terminal, and the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal.

The obtaining unit 703 is configured to obtain call response information fed back by the second service server.

It should be noted that the call response message includes an authentication result obtained by the second service server authenticating the registration authentication code based on the registration authentication code received periodically.

An updating unit 704, configured to update the call state and the registration state of the mobile terminal based on the call response information if the mobile terminal determines that the authentication result is successful.

It should be noted that, the specific principle and the implementation process of each unit in the call switching device disclosed in the above embodiment of the present invention are the same as the method for implementing call switching in the above embodiment of the present invention, and reference may be made to corresponding parts in the call switching method disclosed in the above embodiment of the present invention, which are not described herein again.

Optionally, based on the switching unit 701 shown in fig. 7, the switching unit 701 further includes a determining subunit.

And the judging subunit is used for judging whether the signal strength in the operating data meets the signal strength required by switching to the second network or not after acquiring the operating data of the judging subunit, and if so, continuing to execute the switching unit.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. When the fact that the current network connected with the mobile terminal is disconnected is determined, the mobile terminal is switched to the second network based on the own operation data and connected with the second service server of the second network when the fact that the signal intensity in the own operation data meets the signal intensity needed by switching to the second network is determined. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, the mobile terminal can use a new network, and the mobile terminal updates and displays the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

Optionally, based on the above-mentioned call switching apparatus shown in fig. 7, in conjunction with fig. 7, as shown in fig. 8, the call switching apparatus is further provided with a storage unit 705.

The storage unit 705 is configured to receive and store the registration authentication code periodically issued by the authentication center through the second service server.

In the embodiment of the present invention, when it is determined that the authentication result is that the authentication is successful, it indicates that the mobile terminal may use the second network, and at this time, the authentication center periodically issues, to the mobile terminal through the second service server, the registration authentication code corresponding to the registration information of the mobile terminal, so that the mobile terminal stores the registration authentication code.

Corresponding to the call handover method shown in fig. 5, the embodiment of the present invention also discloses another call handover apparatus, as shown in fig. 9, which is applied to a second service server, and the apparatus includes:

a second sending unit 901, configured to obtain the call signaling sent by the mobile terminal.

It should be noted that the call signaling carries a registration authentication code corresponding to the mobile terminal.

And the authentication unit 902 is configured to authenticate the registered authentication code based on the registered authentication code issued by the authentication center that is received last time, so as to obtain an authentication result.

And a generating unit 903, configured to generate call response information based on the authentication result, and feed the call response information back to the mobile terminal.

It should be noted that, the specific principle and the implementation process of each unit in the call switching device disclosed in the above embodiment of the present invention are the same as the method for implementing call switching in the above embodiment of the present invention, and reference may be made to the corresponding parts in the call switching method disclosed in the above embodiment of the present invention, which are not described again here.

In the embodiment of the invention, when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically, so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, indicating that the mobile terminal can use the new network. By the method, the switching time of the network can be shortened, and the conversation experience of a user can be improved.

Optionally, based on the call handover apparatus shown in fig. 8, the authentication unit 902 is specifically configured to:

and receiving the registration authentication code periodically issued by the authentication center. Judging whether the registration authentication code carried by the call signaling is matched with the registration authentication code which is received by the authentication center at the last time; if the authentication result is matched with the authentication result, the authentication result indicating successful authentication is generated based on the matching information of the registration authentication code carried by the call signaling and the current last received registration authentication code.

Optionally, based on the call switching apparatus shown in fig. 9, the call switching apparatus is further provided with a switching unit and a rejecting unit.

And the switching unit is used for accessing the mobile terminal to the group call of other mobile terminals based on the authentication result indicating the authentication success if the authentication result indicates the authentication success.

And the rejecting unit is used for rejecting the mobile terminal to access the group call with other terminals based on the authentication result indicating the authentication failure if the authentication result indicates the authentication failure.

In the embodiment of the invention, when receiving the call signaling sent by the mobile terminal, the second service server judges whether the registration authentication code received periodically is consistent with the registration authentication code carried by the call signaling, so as to determine whether the mobile terminal can use a new network according to the authentication result. When the registration authentication code received periodically is determined to be consistent with the registration authentication code carried by the call signaling, the mobile terminal can use a new network, and at the moment, the mobile terminal is accessed to the group call of other mobile terminals. When the registration authentication code received periodically is determined to be inconsistent with the registration authentication code carried by the call signaling, it indicates that the mobile terminal can not use a new network, and at this time, the mobile terminal is refused to access the group call with other mobile terminals. By the method, the switching time of the network can be reduced, and the conversation experience of the user can be improved.

Based on the above-mentioned call switching method and call switching device disclosed in the embodiments of the present invention, the embodiments of the present invention also correspondingly disclose a structural schematic diagram of a call switching system, as shown in fig. 10, the call switching system includes a mobile terminal 1001, a first service server 1002, a second service server 1003 and an authentication center 1004.

The mobile terminal 1001 is used for acquiring running data of the mobile terminal when detecting that the mobile terminal is disconnected with a first service server of a first network, switching to a second network based on the running data, and establishing connection with a second service server of the second network, wherein the first service server and the second service server receive a registration authentication code periodically issued by an authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal; sending a call signaling to a second service server, wherein the call signaling indicates the mobile terminal to initiate a group call to other terminals, and the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal; acquiring call response information fed back by the second service server, wherein the call response information comprises an authentication result obtained by the second service server authenticating the registration authentication code based on the periodically received registration authentication code; and if the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information.

The first service server 1002 is configured to receive a registration authentication code periodically issued by an authentication center.

A second service server 1003, configured to receive a registration authentication code periodically issued by an authentication center, and acquire a call signaling sent by a mobile terminal, where the call signaling carries the registration authentication code corresponding to the mobile terminal; the second service server authenticates the registered authentication code based on the registered authentication code issued by the authentication center which is received last time at present to obtain an authentication result; and generating call response information based on the authentication result, and feeding the call response information back to the mobile terminal.

And the authentication center 1004 is configured to periodically issue the registration authentication code bound with the unique terminal information of the mobile terminal to the mobile terminal, the first service server and the second service server.

In the embodiment of the invention, the mobile terminal does not need to register in a new network again. And when the current network connected with the mobile terminal is disconnected, the mobile terminal is switched to a second network based on the operation data of the mobile terminal and is connected with a second service server of the second network. And when receiving the call signaling sent by the mobile terminal, the second service server authenticates the registration authentication code carried by the call signaling based on the registration authentication code received periodically so as to determine whether the mobile terminal can use a new network according to the authentication result. And when the authentication result is determined to be successful, indicating that the mobile terminal can use a new network, and updating and displaying the call state and the registration state of the mobile terminal based on the call response information fed back by the second service server. By the method, the switching time of the network can be shortened, and the conversation experience of a user can be improved.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement without inventive effort.

Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A call switching method is applied to a mobile terminal, and the method comprises the following steps:

the method comprises the steps that when the mobile terminal detects that the mobile terminal is disconnected with a first service server of a first network, the mobile terminal obtains operation data of the mobile terminal, switches to a second network based on the operation data, and establishes connection with a second service server of the second network, wherein the operation data comprise signal intensity, the first service server and the second service server receive a registration authentication code periodically issued by an authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal;

the mobile terminal acquires call response information fed back by the second service server, wherein the call response information comprises an authentication result obtained by the second service server authenticating the registration authentication code based on the periodically received registration authentication code;

2. The method of claim 1, wherein after obtaining the operational data of the mobile device, further comprising:

the mobile terminal judges whether the signal intensity in the operation data meets the signal intensity required by switching to a second network;

and if so, executing the step of switching to a second network based on the operation data and establishing connection with a second service server of the second network.

3. The method according to claim 1, wherein the mobile terminal further comprises, after updating the call state and the registration state of the mobile terminal based on the call response information:

4. A call switching method is applied to a second service server, and comprises the following steps:

when the mobile terminal detects that the mobile terminal is disconnected with a first service server of a first network, the second service server establishes connection with the mobile terminal according to operation data acquired by the mobile terminal, wherein the operation data comprises signal intensity, and the first service server and the second service server receive a registration authentication code periodically issued by an authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal;

the second service server acquires a call signaling sent by a mobile terminal, the call signaling indicates the mobile terminal to initiate a group call to other terminals, and the call signaling carries a registration authentication code corresponding to the mobile terminal;

the second service server authenticates the registered authentication code based on the registered authentication code sent by the authentication center received last time to obtain an authentication result;

5. The method as claimed in claim 4, wherein the second service server authenticates the registration authentication code based on the registration authentication code received last time to obtain the authentication result, comprising:

the second service server receives a registration authentication code periodically issued by an authentication center;

judging whether the registration authentication code carried by the call signaling is matched with the registration authentication code sent by the authentication center received last time currently;

and if the authentication result is matched with the authentication result, generating an authentication result indicating successful authentication based on the matching information of the registration authentication code carried by the call signaling and the current last received registration authentication code.

6. The method of claim 4, wherein before generating the call response information based on the authentication result, further comprising:

if the authentication result indicates that the authentication is successful, accessing the mobile terminal to the group call of other mobile terminals based on the authentication result indicating that the authentication is successful;

and if the authentication result indicates that the authentication fails, rejecting the mobile terminal to access the group call with other terminals based on the authentication result indicating that the authentication fails.

7. A call handover apparatus, applied to a mobile terminal, the apparatus comprising:

the system comprises a switching unit, a first service server and a second service server, wherein the switching unit is used for acquiring self operating data when detecting that the first service server is disconnected with the first network, switching to the second network based on the operating data, and establishing connection with the second service server of the second network, the operating data comprises signal intensity, the first service server and the second service server receive a registration authentication code periodically issued by an authentication center, and the registration authentication code is bound with unique terminal information of the mobile terminal;

a first sending unit, configured to send a call signaling to the second service server, where the call signaling instructs the mobile terminal to initiate a group call to another terminal, and the call signaling carries a registration authentication code corresponding to registration information of the mobile terminal;

an obtaining unit, configured to obtain call response information fed back by the second service server, where the call response information includes an authentication result obtained by authenticating, by the second service server, the registered authentication code based on a registration authentication code received periodically;

8. The apparatus of claim 7, further comprising:

and the storage unit is used for receiving and storing the registration authentication code periodically issued by the authentication center through the second service server.

9. A call switching apparatus, applied to a second service server, the apparatus comprising:

the mobile terminal comprises a connection establishing unit, a connection establishing unit and a connection establishing unit, wherein the connection establishing unit is used for establishing connection with the mobile terminal according to operation data acquired by the mobile terminal when the mobile terminal detects that the mobile terminal is disconnected with a first service server of a first network, the operation data comprises signal intensity, the first service server and a second service server receive registration authentication codes periodically issued by an authentication center, and the registration authentication codes are bound with unique terminal information of the mobile terminal;

10. A call switching system is characterized by comprising a mobile terminal, a first service server, a second service server and an authentication center;

the mobile terminal is used for acquiring running data of the mobile terminal when detecting that the mobile terminal is disconnected with a first service server of a first network, switching to a second network based on the running data, and establishing connection with a second service server of the second network, wherein the running data comprises signal intensity, the first service server and the second service server receive registration authentication codes periodically issued by an authentication center, and the registration authentication codes are bound with unique terminal information of the mobile terminal; sending a call signaling to the second service server, wherein the call signaling indicates the mobile terminal to initiate a group call to other terminals, and the call signaling carries a registration authentication code corresponding to the registration information of the mobile terminal; acquiring call response information fed back by the second service server, wherein the call response information comprises an authentication result obtained by the second service server authenticating the registration authentication code based on the periodically received registration authentication code; if the mobile terminal determines that the authentication result is successful, updating the call state and the registration state of the mobile terminal based on the call response information;