CN106714254B

CN106714254B - Switching method of audio and video service application network, terminal and application server

Info

Publication number: CN106714254B
Application number: CN201510792118.7A
Authority: CN
Inventors: 靳泽宇
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2015-11-17
Filing date: 2015-11-17
Publication date: 2020-02-21
Anticipated expiration: 2035-11-17
Also published as: CN106714254A

Abstract

The invention provides a switching method of an audio and video service application network, a terminal and an application server, wherein the switching method of the audio and video service application network comprises the following steps: after an original call is established through a cellular network, when an available first wireless network is detected, a first switching request is sent to an application server through a preset trusted link; receiving a first verification result fed back after the application server performs switching verification according to the first switching request; and when the first verification result indicates that the verification is passed, keeping the original call, and switching the audio and video data from the cellular network to the first wireless network. The scheme provided by the invention realizes the data switching between the audio and video service application networks through the trusted link based on the cellular network, keeps the continuity of the communication, reduces the occupation of wireless bandwidth and solves the reliability problem of the wireless network.

Description

Switching method of audio and video service application network, terminal and application server

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for switching an audio/video service application network, a terminal, and an application server.

Background

With the development of the times, 4G mobile communication networks are mature day by day, the 4G networks can fully cover China in the near future, and the terminals of users can be considered to be accessed to the mobile communication networks at any time and any place in the near future; and the 4G network not only can provide high-speed data service, but also can provide high-quality audio and video calls, and the latter needs the VoLTE technology to realize.

The Voice over LTE, which is an IP data transmission technology, does not require a 2G/3G network, and all services are carried on a 4G network, so that data and Voice services can be unified in the same network. That is, VoLTE is a voice service based on IMS (IP multimedia subsystem), and IMS becomes a core network standard architecture of the all-IP era due to supporting multiple accesses and rich multimedia services. After the development and maturity of the past years, IMS is now determined by 3GPP, GSMA as a standard architecture for mobile voice.

However, the high-quality audio/video call has a high requirement on bandwidth, and the VoLTE audio/video data inevitably occupies a large amount of bandwidth of the base station, which leads to an increase in the construction cost of the mobile operators.

However, with the development of wifi, wifi hotspots become the preferred solution for network deployment in homes, businesses, and many places. If the audio and video data of the Volte can be switched to the wifi network in the wifi environment, the pressure on the base station bandwidth is greatly reduced.

The existing technical means for solving the problems are from a voice over Internet protocol (Voip) network telephone technology, when a user uses Voip under a cellular network (such as 4G), audio and video data are transmitted through the cellular network, when the user enters a certain wifi hotspot area, and after the terminal establishes connection with the hotspot, the terminal re-initiates a call, and then disconnects the call connection on the original cellular network. However, this approach cannot achieve call continuity, which is equivalent to the user re-dialing a Voip phone.

On the basis of the technical means, a call holding server (or a roaming server) can be added, the terminal requests the call holding server to hold the call before switching, and a new call is established under the wifi condition and then the original connection is disconnected, so that the continuity of the call is realized.

When using a call-on-hold server, however, while handover of cellular networks and wifi hotspots may also be implemented, and multiple wifi hotspots, but in some complex environments, such as a user making a phone call in a mall, under the conditions that certain wifi hotspot equipment in the market breaks down suddenly or the signal intensity is suddenly reduced due to a wifi coverage blind area, and the like, the terminal cannot request the call holding server to hold the call, so that the terminal cannot be switched back to the cellular network while maintaining the call continuity (for example, when a user uses the hotspot 1 to carry out a voip call through the link a, the hotspot 1 suddenly fails, at this time, the terminal cannot request the call holding server to hold the call through the original link a, a new link B must be reestablished under the cellular network, the call is initiated again, and at this time, the call of the link B is regarded as a new call).

Therefore, for the calls requiring the carrier level reliability, such as Volte, the solution of the call holding server cannot be used simply due to the wifi specification and the limitations in the reliability and charging of the common wifi device.

Disclosure of Invention

The invention aims to provide a switching method, a terminal and an application server of an audio and video service application network, which solve the problem of discontinuous conversation caused by switching of the audio and video service application network in the prior art.

In order to solve the above technical problem, an embodiment of the present invention provides a method for switching an audio/video service application network, which is applied to a terminal, and includes:

after an original call is established through a cellular network, when an available first wireless network is detected, a first switching request is sent to an application server through a preset trusted link;

receiving a first verification result fed back after the application server performs switching verification according to the first switching request;

and when the first verification result indicates that the verification is passed, keeping the original call, and switching the audio and video data from the cellular network to the first wireless network.

Optionally, the step of receiving a first verification result fed back by the application server after performing handover verification according to the first handover request includes:

receiving a first token returned by the application server according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data;

initiating a link to the first wireless network, carrying the first token, establishing a first link with the first wireless network, and enabling the application server to perform identity authentication on the terminal by using the first token through the first link;

receiving a second token fed back by the application server through the first link after the verification is passed;

the application server verifies the first link by using the second token through the preset trusted link to obtain a first verification result;

and receiving the first verification result fed back by the application server.

Optionally, before the sending the first handover request to the application server through the preset trusted link, the handover method further includes:

when the first wireless network which is available is detected, sending a request for establishing the preset trusted link to the application server;

and receiving response information returned by the application server, and establishing the preset trusted link with the application server according to the response information.

Optionally, after the audio/video data is handed over from the cellular network to the first wireless network, the handover method further includes:

when the first wireless network is detected to be unavailable and the cellular network is available, sending a second switching request to the application server through the preset trusted link;

receiving a first appointment identifier returned by the application server according to the second switching request;

and keeping the original call according to the first agreed identifier, and switching the audio and video data from the first wireless network back to the cellular network.

when the first wireless network is detected to be unavailable and a second wireless network is detected to be available, a third switching request is sent to the application server through the preset trustable link;

receiving a second verification result fed back after the application server performs switching verification according to the third switching request;

and when the second verification result indicates that the verification is passed, keeping the original call, and switching the audio and video data from the first wireless network to the second wireless network.

Optionally, the step of receiving a second verification result fed back by the application server after performing handover verification according to the third handover request includes:

receiving a third token returned by the application server according to the third switching request;

initiating a link to the second wireless network, carrying the third token, establishing a second link with the second wireless network, and enabling the application server to perform identity authentication on the terminal by using the third token through the second link;

receiving a fourth token fed back by the application server through the second link after the verification is passed;

the application server verifies the second link by using the fourth token through the preset trusted link to obtain a second verification result;

and receiving the second verification result fed back by the application server.

when the first wireless network is detected to be unavailable and a second wireless network is detected to be available, sending a fourth switching request to the application server through the preset trusted link;

receiving a second appointment identifier returned by the application server according to the fourth switching request;

according to the second appointed identification, the original call is kept, and audio and video data are switched back to the cellular network from the first wireless network;

after the cellular network is switched back, a second link is established between the cellular network and the second wireless network, and the second appointed identification is sent to the application server through the second link;

receiving a third verification result fed back after the application server performs switching verification according to the second agreed identifier;

and when the third verification result indicates that the verification is passed, the original call is kept, and the audio and video data are switched to the second wireless network from the cellular network.

Optionally, the step of establishing a second link with the second wireless network, and sending the second appointment identifier to the application server through the second link includes:

initiating a link to the second wireless network, carrying the second agreed identifier, establishing a second link with the second wireless network, and enabling the application server to perform identity authentication on the terminal by using the second agreed identifier through the second link;

the step of receiving a third verification result fed back by the application server after the switching verification according to the second agreed identifier includes:

receiving a fifth token fed back by the application server through the second link after the verification is passed;

the application server verifies the second link by using the fifth token through the preset trusted link to obtain a third verification result;

and receiving the third verification result fed back by the application server.

Optionally, the step of detecting that there is an available first wireless network includes:

when detecting that a wireless network exists, testing the connectivity of the wireless network;

and when the test is passed, determining that the wireless network is an available first wireless network.

The present invention also provides a terminal, including:

the first sending module is used for sending a first switching request to an application server through a preset trusted link when detecting that an available first wireless network exists after an original call is established through a cellular network;

a first receiving module, configured to receive a first verification result fed back by the application server after performing handover verification according to the first handover request;

and the first processing module is used for keeping the original call and switching the audio and video data from the cellular network to the first wireless network when the first verification result indicates that the verification is passed.

The invention also provides a switching method of the audio and video service application network, which is applied to an application server and comprises the following steps:

receiving a first switching request sent by a terminal through a preset trusted connection after an original call is established by a cellular network;

and performing switching verification according to the first switching request, feeding back an obtained first verification result to the terminal, keeping the original conversation and switching the audio and video data from the cellular network to a first wireless network when the first verification result indicates that the verification is passed.

Optionally, the performing handover verification according to the first handover request, and the step of feeding back the obtained first verification result to the terminal includes:

sending a first token to the terminal according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data;

receiving the first token sent by the terminal after the terminal establishes a first link with the first wireless network;

authenticating the terminal through the first token;

when the authentication is passed, sending a second token to the terminal through the first link;

receiving the second token sent by the terminal through the preset trusted link;

verifying the first link through the second token to obtain a first verification result;

and sending the first verification result to the terminal.

Optionally, after the receiving terminal establishes the original call through the cellular network and before the first handover request is sent through a preset trusted connection, the handover method further includes:

receiving a request for establishing the preset trusted link, which is sent by the terminal when the terminal detects the available first wireless network;

and sending a response message to the terminal according to the request for establishing the preset trusted link, and establishing the preset trusted link with the terminal.

receiving a second switching request sent by the terminal when the terminal detects that the first wireless network is unavailable and the cellular network is available;

and sending a first appointed identification to the terminal according to the second switching request, and switching audio and video data back to the cellular network from the first wireless network.

receiving a third switching request sent by the terminal when the terminal detects that the first wireless network is unavailable and a second wireless network is available;

and performing switching verification according to the third switching request, feeding back an obtained second verification result to the terminal, keeping the original conversation and switching the audio and video data from the first wireless network to the second wireless network when the second verification result indicates that the verification is passed.

Optionally, the performing handover verification according to the third handover request, and the step of feeding back the obtained second verification result to the terminal includes:

sending a third token to the terminal according to the third switching request;

receiving the third token sent by the terminal after establishing a second link with the second wireless network;

authenticating the terminal through the third token;

when the authentication is passed, sending a fourth token to the terminal through the second link;

receiving the fourth token sent by the terminal through the preset trusted link;

verifying the second link through the fourth token to obtain a second verification result;

and sending the second verification result to the terminal.

receiving a fourth switching request sent by the terminal when the terminal detects that the first wireless network is unavailable and a second wireless network is available;

sending a second appointed identification to the terminal according to the fourth switching request, and switching audio and video data back to the cellular network from the first wireless network;

after switching back to the cellular network, receiving the second agreed identifier sent by the terminal after establishing a second link with the second wireless network;

and performing switching verification according to the second agreed identification, feeding back an obtained third verification result to the terminal, keeping the original conversation when the third verification result indicates that the verification is passed, and switching the audio and video data from the cellular network to the second wireless network.

Optionally, the step of performing handover verification according to the second agreed identifier and feeding back an obtained third verification result to the terminal includes:

performing identity authentication on the terminal through the second agreed identifier;

when the verification is passed, sending a fifth token to the terminal through the second link;

receiving the fifth token sent by the terminal through the preset trusted link;

verifying the second link through the fifth token to obtain a third verification result;

and sending the third verification result to the terminal.

The present invention also provides an application server, comprising:

the second receiving module is used for receiving a first switching request which is sent by a preset trusted connection after the terminal establishes the original call through the cellular network;

and the second processing module is used for performing switching verification according to the first switching request, feeding back an obtained first verification result to the terminal, keeping the original conversation when the first verification result indicates that the verification is passed, and switching the audio and video data from the cellular network to the first wireless network.

The technical scheme of the invention has the following beneficial effects:

in the above scheme, the switching method of the audio/video service application network realizes data switching between the audio/video service application networks through a trusted link based on a cellular network, so that the continuity of communication is maintained, the occupation of wireless bandwidth is reduced, and the reliability problem of a wireless network is solved.

Drawings

Fig. 1 is a schematic flow chart of a switching method of an audio/video service application network according to a first embodiment of the present invention;

fig. 2 is a schematic flow chart of a switching method of an audio/video service application network according to a second embodiment of the present invention;

fig. 3 is a schematic flow chart of a switching method of an audio/video service application network according to a third embodiment of the present invention;

fig. 4 is a schematic diagram of a switching system architecture of an audio/video service application network according to a third embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to a fourth embodiment of the present invention;

fig. 7 is a schematic structural diagram of an application server according to a fifth embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The invention provides various solutions for the problem of discontinuous conversation caused by switching of audio and video service application networks in the prior art, and the solutions are as follows:

example one

As shown in fig. 1, a method for switching an audio/video service application network according to an embodiment of the present invention is applicable to a terminal, and the method includes:

step 11: after an original call is established through a cellular network, when an available first wireless network is detected, a first switching request is sent to an application server through a preset trusted link;

step 12: receiving a first verification result fed back after the application server performs switching verification according to the first switching request;

step 13: and when the first verification result indicates that the verification is passed, keeping the original call, and switching the audio and video data from the cellular network to the first wireless network.

The scheme provided by the embodiment of the invention realizes the data switching between the audio and video service application networks through the trusted link based on the cellular network, keeps the continuity of the communication, reduces the occupation of the wireless bandwidth and solves the reliability problem of the wireless network.

Specifically, the step of receiving a first verification result fed back by the application server after performing handover verification according to the first handover request includes: receiving a first token returned by the application server according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data;

receiving a second token fed back by the application server through the first link after the verification is passed; the application server verifies the first link by using the second token through the preset trusted link to obtain a first verification result; and receiving the first verification result fed back by the application server.

Further, before the sending the first handover request to the application server through the preset trusted link, the handover method further includes: when the first wireless network which is available is detected, sending a request for establishing the preset trusted link to the application server; and receiving response information returned by the application server, and establishing the preset trusted link with the application server according to the response information.

Considering that after the terminal is handed over from the cellular network to the first wireless network, the first wireless network may be unavailable, weak in signal or slow in speed, and the like, the first embodiment of the present invention provides the following two solutions:

first strategy, switch back to cellular network

That is, after the switching the audio/video data from the cellular network to the first wireless network, the switching method further includes:

when the first wireless network is detected to be unavailable and the cellular network is available, sending a second switching request to the application server through the preset trusted link; receiving a first appointment identifier returned by the application server according to the second switching request; and keeping the original call according to the first agreed identifier, and switching the audio and video data from the first wireless network back to the cellular network.

Second strategy to switch to a second wireless network that is available

For a terminal supporting direct handover between wireless networks, that is, after the audio/video data is handed over from the cellular network to the first wireless network, the handover method further includes:

when the first wireless network is detected to be unavailable and a second wireless network is detected to be available, a third switching request is sent to the application server through the preset trustable link; receiving a second verification result fed back after the application server performs switching verification according to the third switching request; and when the second verification result indicates that the verification is passed, keeping the original call, and switching the audio and video data from the first wireless network to the second wireless network.

Specifically, the step of receiving a second verification result fed back by the application server after performing handover verification according to the third handover request includes: receiving a third token returned by the application server according to the third switching request;

receiving a fourth token fed back by the application server through the second link after the verification is passed; the application server verifies the second link by using the fourth token through the preset trusted link to obtain a second verification result; and receiving the second verification result fed back by the application server.

For a terminal that does not support direct handover between wireless networks, that is, after the audio/video data is handed over from the cellular network to the first wireless network, the handover method further includes:

when the first wireless network is detected to be unavailable and a second wireless network is detected to be available, sending a fourth switching request to the application server through the preset trusted link; receiving a second appointment identifier returned by the application server according to the fourth switching request;

according to the second appointed identification, the original call is kept, and audio and video data are switched back to the cellular network from the first wireless network; after the cellular network is switched back, a second link is established between the cellular network and the second wireless network, and the second appointed identification is sent to the application server through the second link;

receiving a third verification result fed back after the application server performs switching verification according to the second agreed identifier; and when the third verification result indicates that the verification is passed, the original call is kept, and the audio and video data are switched to the second wireless network from the cellular network.

Specifically, the step of establishing a second link with the second wireless network and sending the second appointment identifier to the application server through the second link includes:

the step of receiving a third verification result fed back by the application server after the switching verification according to the second agreed identifier includes: receiving a fifth token fed back by the application server through the second link after the verification is passed; the application server verifies the second link by using the fifth token through the preset trusted link to obtain a third verification result; and receiving the third verification result fed back by the application server.

In addition, preferably, the step of detecting that a first wireless network is available includes: when detecting that a wireless network exists, testing the connectivity of the wireless network; and when the test is passed, determining that the wireless network is an available first wireless network.

Example two

As shown in fig. 2, a switching method of an audio/video service application network provided in the second embodiment of the present invention may be applied to an application server, where the switching method includes:

step 21: receiving a first switching request sent by a terminal through a preset trusted connection after an original call is established by a cellular network;

step 22: and performing switching verification according to the first switching request, feeding back an obtained first verification result to the terminal, keeping the original conversation and switching the audio and video data from the cellular network to a first wireless network when the first verification result indicates that the verification is passed.

The scheme provided by the second embodiment of the invention realizes the data switching between the audio and video service application networks through the trusted link based on the cellular network, keeps the continuity of the communication, reduces the occupation of the wireless bandwidth and solves the reliability problem of the wireless network.

Specifically, the step of performing handover verification according to the first handover request and feeding back an obtained first verification result to the terminal includes: sending a first token to the terminal according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data;

receiving the first token sent by the terminal after the terminal establishes a first link with the first wireless network; authenticating the terminal through the first token; when the authentication is passed, sending a second token to the terminal through the first link;

receiving the second token sent by the terminal through the preset trusted link; verifying the first link through the second token to obtain a first verification result; and sending the first verification result to the terminal.

Further, after the receiving terminal establishes the original call through the cellular network and before the first handover request is sent through a preset trusted connection, the handover method further includes: receiving a request for establishing the preset trusted link, which is sent by the terminal when the terminal detects the available first wireless network; and sending a response message to the terminal according to the request for establishing the preset trusted link, and establishing the preset trusted link with the terminal.

In consideration of the problems that the first wireless network may be unavailable, weak in signal or slow in speed after the terminal is handed over from the cellular network to the first wireless network, the second embodiment of the present invention provides the following two solutions:

first strategy, switch back to cellular network

receiving a second switching request sent by the terminal when the terminal detects that the first wireless network is unavailable and the cellular network is available; and sending a first appointed identification to the terminal according to the second switching request, and switching audio and video data back to the cellular network from the first wireless network.

Second strategy to switch to a second wireless network that is available

For a terminal supporting direct handover between wireless networks, that is, after the audio/video data is handed over from the cellular network to the first wireless network, the handover method further includes: receiving a third switching request sent by the terminal when the terminal detects that the first wireless network is unavailable and a second wireless network is available;

Specifically, the step of performing handover verification according to the third handover request and feeding back an obtained second verification result to the terminal includes: sending a third token to the terminal according to the third switching request;

receiving the third token sent by the terminal after establishing a second link with the second wireless network; authenticating the terminal through the third token; when the authentication is passed, sending a fourth token to the terminal through the second link;

receiving the fourth token sent by the terminal through the preset trusted link; verifying the second link through the fourth token to obtain a second verification result; and sending the second verification result to the terminal.

For a terminal that does not support direct handover between wireless networks, that is, after the audio/video data is handed over from the cellular network to the first wireless network, the handover method further includes: receiving a fourth switching request sent by the terminal when the terminal detects that the first wireless network is unavailable and a second wireless network is available;

sending a second appointed identification to the terminal according to the fourth switching request, and switching audio and video data back to the cellular network from the first wireless network; after switching back to the cellular network, receiving the second agreed identifier sent by the terminal after establishing a second link with the second wireless network;

Specifically, the step of performing handover verification according to the second agreed identifier and feeding back an obtained third verification result to the terminal includes: performing identity authentication on the terminal through the second agreed identifier; when the verification is passed, sending a fifth token to the terminal through the second link;

receiving the fifth token sent by the terminal through the preset trusted link; verifying the second link through the fifth token to obtain a third verification result; and sending the third verification result to the terminal.

EXAMPLE III

A third embodiment of the present invention provides a method for switching an audio/video service application network (cellular network to wireless network) by combining the first embodiment and the second embodiment, where the method includes:

step 31: a terminal initiates a call request to a telephone Application Server (AS);

step 32: the telephone AS establishes a call with the terminal according to the call request;

when a user establishes a voice and video call based on the lte cellular network, both the voice data and the video data are transmitted by using the lte cellular network.

Step 33: the terminal initiates an establishment request for establishing a trusted data link 1 to a telephone AS;

step 34: the telephone AS establishes a trusted data link 1 with the terminal according to the establishment request;

that is, prior to handover, the terminal establishes and maintains a trusted data link (link 1 for short) with the telephony AS over the cellular network.

Step 35: the terminal is connected to the wifi hotspot;

and when finding that the usable wifi hotspot exists, the terminal establishes a link with the wifi hotspot.

Step 36: the terminal uses the link 1 to request data link switching from the telephone AS;

a request is sent to the phone AS over link 1 to prepare to switch voice, video data to the wifi network.

Step 37: the telephone AS returns token1 to the terminal through link 1;

after receiving the request, the telephone AS returns a "switching token" (token 1 for short) to the terminal, which is used to indicate the identity of the voice and video data switching.

Step 38: the terminal establishes a link 2 (carrying token1) by using wifi;

after receiving the token1, the terminal initiates a link (link 2) through the wifi network, and sends the token1 as an identifier.

Step 39: the telephone AS returns token2 to the terminal over link 2;

after link 2 is established, the telephone AS returns a "verification token" (token 2 for short) to the terminal after receiving token 1.

Step 310: the terminal authenticates token2 to the phone AS using link 1;

the terminal sends token2 to the telephony AS over trusted link 1 to verify the legitimacy of link 2.

Step 311: the telephone AS feeds back the confirmed response information to the terminal and switches the original volte audio and video data to the link 2;

after the telephone AS server verifies that the token2 is passed, the original call is 'kept' and switched to the new link after the new link is established.

Step 312: data is transmitted between the terminal and the telephone AS via link 2.

The above scheme for switching the cellular network to the wireless network is summarized as follows: establishing a trusted data link on 4G for call switching and state maintenance on the premise that a volte call is established; if the wifi network is available, audio and video connection is established on the wifi; applying for switching through a trusted link; and disconnecting the original volte connection to realize switching of the audio and video to the wifi network.

Considering that the wireless network after handover may be unusable, the third embodiment of the present invention further provides a scheme for switching the wireless network back to the cellular network and switching the wireless network to another wireless network, which is summarized as follows:

wireless network to cellular network handover

If the fact that the switched wifi network is unavailable, weak in signal or low in speed is detected, audio and video connection is established on the cellular network; applying for switching through a trusted link; and the original wifi connection is disconnected, and the audio and video are switched to the cellular network.

Handover of a wireless network to another wireless network

If the fact that the wifi-1 network is unavailable, the signal is weak or the speed is slow and the wifi-2 network is available is detected, audio and video connection is established on the wifi-2; applying for switching through a trusted link; and the original wifi-1 connection is disconnected, and the audio and video are switched to a wifi-2 network.

The switching method of the audio/video service application network provided by the third embodiment of the present invention can be applied to the system shown in fig. 4, wherein the calling terminal can establish a trusted link with a Session Border Controller (SBC) through a cellular network, and then transmit the trusted link to a telephone AS; audio and video data can be sent to the SBC through the Internet through wifi and then transferred to the telephone AS and the SBC which interacts with the called terminal, and the called terminal can perform information transfer with the corresponding SBC through the cellular network.

In addition, the terminal related to the third embodiment of the present invention may adopt a terminal structure AS shown in fig. 5, where the terminal includes a communication processor that can establish a trusted link with the AS through a cellular network, and an application processor that can perform information transfer through wifi.

As can be seen from the above, in the scheme provided in the third embodiment of the present invention, data switching between audio and video service application networks (for example, between a cellular network and a wifi network) is implemented through a trusted link based on the cellular network, so that continuity of a call is ensured, and the scheme makes full use of the capability of a 4G large network, is suitable for volte, is trusted in switching, can manage and charge, reduces occupation of a wireless bandwidth, avoids the problem of wifi reliability, and can reduce network construction cost.

Example four

As shown in fig. 6, a terminal according to a fourth embodiment of the present invention includes:

a first sending module 61, configured to send a first handover request to an application server through a preset trusted link when detecting that an available first wireless network is available after an original call is established through a cellular network;

a first receiving module 62, configured to receive a first verification result fed back after the application server performs handover verification according to the first handover request;

and the first processing module 63 is configured to keep the original call and switch the audio/video data from the cellular network to the first wireless network when the first verification result indicates that the verification passes.

The scheme provided by the fourth embodiment of the invention realizes the data switching between the audio and video service application networks through the trusted link based on the cellular network, keeps the continuity of the communication, reduces the occupation of the wireless bandwidth and solves the reliability problem of the wireless network.

Specifically, the first receiving module includes: the first receiving submodule is used for receiving a first token returned by the application server according to the first switching request, and the first token is used for representing the identity of the audio and video switching data;

the first processing sub-module is used for initiating a link to the first wireless network, carrying the first token, establishing a first link with the first wireless network, and enabling the application server to perform identity authentication on the terminal by using the first token through the first link; the second receiving submodule is used for receiving a second token fed back by the application server through the first link after the verification is passed;

the second processing submodule is used for enabling the application server to verify the first link by using the second token through the preset trusted link to obtain a first verification result; and the third receiving submodule is used for receiving the first verification result fed back by the application server.

Further, the terminal further includes: a second sending module, configured to send, to the application server, a request for establishing the preset trusted link when the first wireless network is detected to be available before the first sending module performs an operation; and the third processing module is used for receiving response information returned by the application server and establishing the preset trusted link with the application server according to the response information.

Considering that, after the terminal is handed over from the cellular network to the first wireless network, the first wireless network may be unavailable, weak in signal or slow in speed, and the like, a fourth embodiment of the present invention provides the following two solutions:

first strategy, switch back to cellular network

That is, the terminal further includes: a third sending module, configured to send a second handover request to the application server through the preset trusted link when the first processing module detects that the first wireless network is unavailable and the cellular network is available after performing an operation;

a third receiving module, configured to receive the first appointment identifier returned by the application server according to the second switching request; and the fourth processing module is used for keeping the original call according to the first agreed identifier and switching the audio and video data back to the cellular network from the first wireless network.

Second strategy to switch to a second wireless network that is available

For a terminal that supports direct handover between wireless networks, that is, the terminal further includes: a fourth sending module, configured to send a third handover request to the application server through the preset trusted link when the first processing module detects that the first wireless network is unavailable and a second wireless network is available after performing an operation;

a fourth receiving module, configured to receive a second verification result fed back by the application server after performing handover verification according to the third handover request; and the fifth processing module is used for keeping the original call and switching the audio and video data from the first wireless network to the second wireless network when the second verification result indicates that the verification is passed.

Specifically, the fourth receiving module includes: a third receiving submodule, configured to receive a third token returned by the application server according to the third switching request;

a third processing submodule, configured to initiate a link to the second wireless network, carry the third token, establish a second link with the second wireless network, and enable the application server to perform identity authentication on the terminal by using the third token through the second link; the fourth receiving submodule is used for receiving a fourth token fed back by the application server through the second link after the verification is passed;

the fourth processing submodule is used for enabling the application server to verify the second link by using the fourth token through the preset trusted link to obtain a second verification result; and the fifth receiving submodule is used for receiving the second verification result fed back by the application server.

For a terminal that does not support direct handover between wireless networks, that is, the terminal further comprises: a fifth sending module, configured to send a fourth handover request to the application server through the preset trusted link when the first processing module detects that the first wireless network is unavailable and a second wireless network is available after performing an operation;

a fifth receiving module, configured to receive a second contract identifier returned by the application server according to the fourth switching request; the sixth processing module is used for keeping the original call according to the second agreed identifier and switching audio and video data back to the cellular network from the first wireless network;

the seventh processing module is configured to establish a second link with the second wireless network after switching back to the cellular network, and send the second agreed identifier to the application server through the second link; a sixth receiving module, configured to receive a third verification result fed back after the application server performs the handover verification according to the second agreed identifier; and the eighth processing module is used for keeping the original call and switching the audio and video data from the cellular network to the second wireless network when the third verification result indicates that the verification is passed.

Specifically, the seventh processing module includes: a fifth processing sub-module, configured to initiate a link to the second wireless network, carry the second agreed identifier, establish a second link with the second wireless network, and enable the application server to perform identity authentication on the terminal through the second link by using the second agreed identifier;

the sixth receiving module includes: the sixth receiving submodule is used for receiving a fifth token fed back by the application server through the second link after the verification is passed;

a sixth processing submodule, configured to enable the application server to verify the second link by using the fifth token through the preset trusted link, so as to obtain a third verification result; and the seventh receiving submodule is used for receiving the third verification result fed back by the application server.

In addition, preferably, the first transmitting module includes: the testing sub-module is used for testing the connectivity of a wireless network when the wireless network is detected to exist; and the determining submodule is used for determining that the wireless network is an available first wireless network when the test is passed.

The implementation embodiments related to the method for switching the audio/video service application network at the terminal side in the first embodiment and the third embodiment are all applicable to the embodiment of the terminal, and can achieve the same technical effect.

EXAMPLE five

As shown in fig. 7, an application server provided in the fifth embodiment of the present invention includes:

a second receiving module 71, configured to receive a first switching request sent by a terminal through a preset trusted connection after an original call is established by a cellular network;

and the second processing module 72 is configured to perform handover verification according to the first handover request, feed back an obtained first verification result to the terminal, keep the original call when the first verification result indicates that verification passes, and switch the audio/video data from the cellular network to the first wireless network.

The scheme provided by the fifth embodiment of the invention realizes the data switching between the audio and video service application networks through the trusted link based on the cellular network, keeps the continuity of the communication, reduces the occupation of the wireless bandwidth and solves the reliability problem of the wireless network.

Specifically, the second processing module includes: the first sending submodule is used for sending a first token to the terminal according to the first switching request, and the first token is used for representing the identity of the audio and video switching data;

an eighth receiving submodule, configured to receive the first token sent after the terminal establishes the first link with the first wireless network; the first verification submodule is used for performing identity verification on the terminal through the first token; the second sending submodule is used for sending a second token to the terminal through the first link when the verification is passed;

a ninth receiving submodule, configured to receive the second token sent by the terminal through the preset trusted link; the second verification submodule is used for verifying the first link through the second token to obtain a first verification result; and the third sending submodule is used for sending the first verification result to the terminal.

Further, the application server further includes: a seventh receiving module, configured to receive, before the second receiving module performs an operation, a request for establishing the preset trusted link, where the request is sent by the terminal when detecting that the first wireless network is available; and the ninth processing module is used for sending a response message to the terminal according to the request for establishing the preset trusted link and establishing the preset trusted link with the terminal.

Considering that, after the terminal is handed over from the cellular network to the first wireless network, the first wireless network may be unavailable, weak in signal or slow in speed, and the like, a fifth embodiment of the present invention provides the following two solutions:

first strategy, switch back to cellular network

That is, the application server further includes: an eighth receiving module, configured to receive, after the second processing module performs an operation, a second handover request sent by the terminal when the first wireless network is detected to be unavailable and the cellular network is available; and the tenth processing module is used for sending a first appointed identifier to the terminal according to the second switching request and switching the audio and video data from the first wireless network back to the cellular network.

Second strategy to switch to a second wireless network that is available

For a terminal that supports direct handover between wireless networks, that is, the application server further includes: a ninth receiving module, configured to receive, after the second processing module executes the operation, a third handover request sent by the terminal when detecting that the first wireless network is unavailable and a second wireless network is available;

and the eleventh processing module is used for performing switching verification according to the third switching request, feeding back an obtained second verification result to the terminal, keeping the original call when the second verification result indicates that the verification is passed, and switching the audio and video data from the first wireless network to the second wireless network.

Specifically, the eleventh processing module includes: a fourth sending submodule, configured to send a third token to the terminal according to the third handover request;

a tenth receiving submodule, configured to receive the third token sent after the terminal establishes a second link with the second wireless network; the third verification submodule is used for performing identity verification on the terminal through the third token; a fifth sending submodule, configured to send a fourth token to the terminal through the second link when the verification is passed;

an eleventh receiving submodule, configured to receive the fourth token sent by the terminal through the preset trusted link; the fourth verification submodule is used for verifying the second link through the fourth token to obtain a second verification result; and the sixth sending submodule is used for sending the second verification result to the terminal.

For a terminal that does not support direct handover between wireless networks, that is, the application server further includes: a tenth receiving module, configured to receive, after the second processing module executes the operation, a fourth handover request sent by the terminal when detecting that the first wireless network is unavailable and a second wireless network is available; a twelfth processing module, configured to send a second agreed identifier to the terminal according to the fourth handover request, and switch the audio and video data from the first wireless network back to the cellular network;

an eleventh receiving module, configured to receive, after switching back to the cellular network, the second agreed identifier sent by the terminal after establishing the second link with the second wireless network; and the thirteenth processing module is used for performing switching verification according to the second agreed identifier, feeding back an obtained third verification result to the terminal, keeping the original call when the third verification result indicates that the verification is passed, and switching the audio and video data from the cellular network to the second wireless network.

Specifically, the thirteenth processing module includes: a fifth verification sub-module, configured to perform identity verification on the terminal through the second agreed identifier; a seventh sending submodule, configured to send a fifth token to the terminal through the second link when the verification is passed;

a twelfth receiving submodule, configured to receive the fifth token sent by the terminal through the preset trusted link; the sixth verification submodule is used for verifying the second link through the fifth token to obtain a third verification result; and the eighth sending submodule is used for sending the third verification result to the terminal.

The implementation embodiments related to the switching method of the audio/video service application network at the application server side in the first embodiment and the third embodiment are all applicable to the embodiment of the application server, and can achieve the same technical effect.

It should be noted that many of the functional components described in this specification are referred to as modules/sub-modules in order to more particularly emphasize their implementation independence.

In embodiments of the invention, the modules/sub-modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A switching method of an audio and video service application network is applied to a terminal and is characterized by comprising the following steps:

receiving a first verification result fed back by the application server after the switching verification according to the first switching request, wherein the first verification result comprises: receiving a first token returned by the application server according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data; initiating a link to the first wireless network, carrying the first token, establishing a first link with the first wireless network, and enabling the application server to perform identity authentication on the terminal by using the first token through the first link; receiving a second token fed back by the application server through the first link after the verification is passed; the application server verifies the first link by using the second token through the preset trusted link to obtain a first verification result; receiving the first verification result fed back by the application server;

when the first verification result indicates that verification passes, the original call is kept, and audio and video data are switched to the first wireless network from the cellular network;

2. The handover method according to claim 1, wherein prior to said sending the first handover request to the application server via the pre-established trusted link, the handover method further comprises:

3. The handover method of claim 1, wherein after the handover of audio-video data from the cellular network to the first wireless network, the handover method further comprises:

4. The handover method of claim 1, wherein after the handover of audio-video data from the cellular network to the first wireless network, the handover method further comprises:

5. The handover method according to claim 4, wherein the step of receiving a second verification result fed back by the application server after performing handover verification according to the third handover request comprises:

6. The handover method of claim 1, wherein establishing a second link with the second wireless network, and wherein sending the second appointment identifier to the application server via the second link comprises:

and receiving the third verification result fed back by the application server.

7. The handover method of claim 1, wherein the step of detecting that a first wireless network is available comprises:

8. A terminal, comprising:

a first receiving module, configured to receive a first verification result fed back by the application server after performing handover verification according to the first handover request, where the first receiving module includes: receiving a first token returned by the application server according to the first switching request, wherein the first token is used for representing an identity of audio and video switching data; initiating a link to the first wireless network, carrying the first token, establishing a first link with the first wireless network, and enabling the application server to perform identity authentication on the terminal by using the first token through the first link; receiving a second token fed back by the application server through the first link after the verification is passed; the application server verifies the first link by using the second token through the preset trusted link to obtain a first verification result; receiving the first verification result fed back by the application server;

the first processing module is used for keeping the original call and switching the audio and video data from the cellular network to the first wireless network when the first verification result indicates that the verification is passed;

a fifth sending module, configured to send a fourth handover request to the application server through the preset trusted link when detecting that the first wireless network is unavailable and a second wireless network is available;

a fifth receiving module, configured to receive a second contract identifier returned by the application server according to the fourth switching request;

the sixth processing module is used for keeping the original call according to the second agreed identifier and switching audio and video data back to the cellular network from the first wireless network;

the seventh processing module is configured to establish a second link with the second wireless network after switching back to the cellular network, and send the second agreed identifier to the application server through the second link;

a sixth receiving module, configured to receive a third verification result fed back after the application server performs the handover verification according to the second agreed identifier;

and the eighth processing module is used for keeping the original call and switching the audio and video data from the cellular network to the second wireless network when the third verification result indicates that the verification is passed.

9. A switching method of an audio and video service application network is applied to an application server, and is characterized by comprising the following steps:

performing handover verification according to the first handover request, and feeding back an obtained first verification result to the terminal, including: sending a first token to the terminal according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data; receiving the first token sent by the terminal after the terminal establishes a first link with a first wireless network; authenticating the terminal through the first token; when the authentication is passed, sending a second token to the terminal through the first link; receiving the second token sent by the terminal through the preset trusted link; verifying the first link through the second token to obtain a first verification result; sending the first verification result to the terminal;

when the first verification result indicates that the verification is passed, the original call is kept, and the audio and video data are switched to a first wireless network from the cellular network;

10. The handover method according to claim 9, wherein after the receiving terminal establishes the original call through the cellular network, and before the first handover request is sent through a predetermined trusted connection, the handover method further comprises:

11. The handover method according to claim 9, wherein after the handover of the audio-video data from the cellular network to the first wireless network, the handover method further comprises:

12. The handover method according to claim 9, wherein after the handover of the audio-video data from the cellular network to the first wireless network, the handover method further comprises:

13. The handover method according to claim 12, wherein the step of performing handover verification according to the third handover request and feeding back the obtained second verification result to the terminal comprises:

sending a third token to the terminal according to the third switching request;

authenticating the terminal through the third token;

and sending the second verification result to the terminal.

14. The handover method according to claim 9, wherein the step of performing handover verification according to the second agreed identifier and feeding back an obtained third verification result to the terminal comprises:

receiving the fifth token sent by the terminal through the preset trusted link;

and sending the third verification result to the terminal.

15. An application server, comprising:

the second processing module is used for performing switching verification according to the first switching request, feeding back an obtained first verification result to the terminal, keeping the original conversation when the first verification result indicates that the verification is passed, and switching the audio and video data from the cellular network to a first wireless network; the method comprises the following steps: sending a first token to the terminal according to the first switching request, wherein the first token is used for representing an identity of the audio and video switching data; receiving the first token sent by the terminal after the terminal establishes a first link with the first wireless network; authenticating the terminal through the first token; when the authentication is passed, sending a second token to the terminal through the first link; receiving the second token sent by the terminal through the preset trusted link; verifying the first link through the second token to obtain a first verification result; sending the first verification result to the terminal;

a tenth receiving module, configured to receive a fourth handover request sent by the terminal when detecting that the first wireless network is unavailable and the second wireless network is available;

a twelfth processing module, configured to send a second agreed identifier to the terminal according to the fourth handover request, and switch the audio/video data from the first wireless network back to the cellular network;

an eleventh receiving module, configured to receive, after switching back to the cellular network, the second agreed identifier sent by the terminal after establishing the second link with the second wireless network;

and the thirteenth processing module is used for performing switching verification according to the second agreed identifier, feeding back an obtained third verification result to the terminal, keeping the original call when the third verification result indicates that the verification is passed, and switching the audio and video data from the cellular network to the second wireless network.