WO2011050650A1

WO2011050650A1 - Method, device and system for processing video telephone fallback

Info

Publication number: WO2011050650A1
Application number: PCT/CN2010/076150
Authority: WO
Inventors: 赵顼
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-10-29
Filing date: 2010-08-19
Publication date: 2011-05-05
Also published as: CN101695121A

Abstract

A method, device and system for processing video telephone fallback are provided in the present invention. The method includes: detecting a network resource state when a video telephone falls back to a voice telephone; requesting an initial call end to switch the current voice telephone back to the video telephone when detecting the network resources to be used for establishing the video telephone; and completing switching from the voice telephone to the video telephone after the initial call end receives the request for switching the current voice telephone back to the video telephone. In the present invention, after the video telephone falls back to the voice telephone, the Mobile Switching Center (MSC) of the initial call end detects the network state; the MSC of the initial call end requests the initial call end to switch back to the video telephone when the Radio Network Controller (RNC) of the local end or the MSC of the opposite end informs the MSC of the initial call end the existence of the network resources to be used for establishing the video telephone; switching from the voice telephone to the video telephone is completed after the initial call end receives the request. The problem that the video telephone can not be restored after the video telephone falls back to the voice telephone is solved in an effective manner, and the experience of the users is enhanced.

Description

Video phone fallback processing method, device and system

Technical field

The present invention relates to the field of mobile communications, and in particular, to a method, apparatus and system for processing video callback.

Background technique

The rapid development of mobile communication technology in recent years, especially the arrival of the third generation mobile communication technology (3G), marks that mobile communication technology has entered the high-speed era. The improvement of network speed can not only improve the service quality of the original business, but also enrich the types of services.

Video telephony is a very distinctive service of 3G--, bringing a new business experience to users. However, compared with ordinary voice calls, video phones have higher requirements for wireless resources and devices, and require various support. When the conditions for establishing a video call are not met, the video call will fall back. The so-called fallback refers to the function of the user to select to drop the video call back into a voice call when the video call is established or during the call, because the network or the terminal cannot establish or maintain the video call.

In the process of the above-mentioned videophone call being set up during the call or during the call, there are the following problems:

After the video call has dropped back to the voice call, there is no recovery mechanism that enables the recovery of the voice call to the video call, which affects the user experience.

Summary of the invention

The invention provides a processing method, device and system for video call fallback, which solves the problem that the video call cannot be recovered after being returned. The present invention provides a method for processing video call fallback, including:

Detecting the status of the network resource after the video call falls back to the voice call;

When detecting a network resource that can be used to establish a video call, requesting the originating call to switch the current voice call back to the video call; After receiving the request to switch the current voice call back to the video call at the originating end, the switching from the voice call to the video call is completed.

Preferably, before the step of detecting the state of the network resource after the video call is dropped to the voice call, the method further includes:

The video call is detected to fall back to the voice call, and the voice call is marked.

Preferably, after the step of switching back to the video call from the originating call request, when the network resource that can be used to establish the video call is detected, the method further includes:

After the originating call rejects the request to switch the current voice call back to the video call, the current voice call is continued and the voice call's flag is cleared.

Preferably, when detecting the network resource that can be used to establish a video call, the step of switching back to the video call from the originating call request comprises:

Receiving a video resource available notification message sent by the originating call end radio network controller (RNC), the video resource available notification message indicating that the originating end has resources available for establishing a video call; and transmitting a video call setup request message to the originating terminal , request to establish a video call.

Receiving a video resource available notification message sent by the called mobile switching center (MSC), where the video resource available notification message indicates that the called end has resources available for establishing a video call;

A video call setup request message is sent to the originating end requesting to establish a video call.

The invention also provides a processing method for video call fallback, comprising:

When receiving the video resource available notification message sent by the called terminal radio network controller (RNC), sending a video resource available notification message to the originating mobile switching center (MSC), requesting to switch the current voice call back to the video call; as well as

Switching from the voice call to the video call is completed in accordance with the indication from the originating terminal MSC. The invention also provides an MSC, comprising:

A network resource detection module, configured to detect a network after the video call falls back to the voice call Resource status

a handover requesting module, configured to, when the network resource detection module detects a network resource that can be used to establish a video call, request the originating call to switch the current voice call back to the video call; and

The switching execution module is configured to complete the switching from the voice call to the video call after receiving the request to switch the current voice call back to the video call at the originating end.

Preferably, the handover execution module is further configured to continue to maintain the current voice call after the originating call rejects the request to switch the current voice call back to the video call.

Preferably, the handover request module includes:

a notification receiving unit, configured to receive a video resource available notification message sent by the originating end radio network controller (RNC) or the called end MSC, where the video resource available notification message indicates that the originating end or the called end is available for establishing Video telephony resources;

A request sending unit is configured to send a video call setup request message to the originating end requesting to establish a video call.

Preferably, the handover requesting module is further configured to: when receiving the video resource available notification message sent by the local RNC, send a video resource available notification message to the originating terminal MSC, requesting to switch the current voice call back to the video call.

The present invention also provides a video telephone fallback processing system, including a originating mobile switching center (MSC) and a called end MSC;

The originating terminal MSC is configured to detect a network resource status after the video call falls back to the voice call, and when the network resource that can be used to establish the video call is detected, request the originating end to switch the current voice call back to the video call. And after receiving the request to switch the current voice call back to the video call at the originating end, completing the switching from the voice call to the video call;

The called end MSC is configured to detect a network resource status after receiving a video call back to the voice call due to insufficient network resources of the called end, and receive a video resource available notification message sent by the local radio network controller (RNC) And sending a video resource available notification message to the originating terminal MSC, requesting to switch the current voice call back to the video call, and completing the handover from the voice call to the video call according to the instruction of the originating end MSC. The embodiment of the present invention provides a method, a device and a system for processing a video call back. After the video call returns to the voice call, the originating end MSC detects the network status, and the local RNC or the opposite MSC notifies the start. When the calling MSC has network resources that can be used to establish a video call, the originating terminal MSC requests the originating terminal to switch the current voice call back to the video call, and accepts the request to switch the current voice call back to the video call at the originating end. After that, the switching from the voice call to the video call is completed; after the initial call end refuses to switch the current voice call back to the video call request, the current voice call is continued, and the problem that the video call cannot be recovered after the video call back can be solved. The user experience. BRIEF abstract

1 is a flowchart of a videophone recovery method according to Embodiment 1 of the present invention; FIG. 2 is a schematic structural diagram of an application scenario according to an embodiment of the present invention;

3 is a flowchart of a videophone recovery method according to Embodiment 2 of the present invention; FIG. 4 is a schematic structural diagram of an MSC according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of the handover request module 402 of FIG. 4;

FIG. 6 is a schematic structural diagram of a videophone recovery system according to an embodiment of the present invention. Preferred embodiment of the invention

The video call will fall back to the voice call when:

1. In the video call, the wireless resource (including the originating end and the called end) cannot maintain the current video call (invalid #47, Resources unavailable, unspecified);

2. The originating caller's radio resource allocation fails when the video call is initiated (invalid #47, Resources unavailable, unspecified);

3. When the video call is initiated, the called end network does not support video call (cause #79, Service or option not implemented, unspecified);

4. When the video call is initiated, the called terminal does not support the video call ( cause #88, Incompatible destination); 5. The radio resource allocation of the called party fails when the video call is initiated (invalid #47, Resources unavailable, unspecified)

6. When the video call is initiated, the called terminal rejects and selects the call answer (cause #21, Call rejected or cause #17).

For the above cases 3, 4 and 6, the called end may be in the 2G network, or the called terminal does not have the video telephony function enabled, or the called terminal does not support the video telephony function, and for the cases 1, 2 and 5 The user expects to obtain the video telephony service, which causes a fall due to network reasons. In the case of network resources, the user wants to switch back to the video call for a better experience. Lack of a switching mechanism to achieve recovery of video calls after the fall.

In order to solve the problem that the video call back cannot be recovered, the embodiment of the present invention provides a method for processing video call fallback.

First, the first embodiment of the present invention will be described with reference to the accompanying drawings.

Embodiment 1 of the present invention provides a method for processing a video call fallback. When the originating end wireless resource cannot maintain the current video call during the video call, or the originating end cannot initiate a video call because the resource allocation fails, The video phone is recovered under the condition that the network resources are allowed afterwards. The specific process is shown in Figure 1, including:

Step 101: The videophone is detected to fall back to the voice call, and the voice call is marked. The application environment of the embodiment of the present invention is as shown in FIG. 2, and includes: a user equipment (UE) 201, a radio network controller (RNC) 202, and a mobile switching. Center (MSC) 203, UE 204, RNC 205, MSC 206; wherein UE 201, RNC 202 and MSC 203 are in the same network, UE 204, RNC 205 and MSC 206 are in the same network. In the embodiment of the present invention, the UE 201 is used as the originating end (originating call terminal), and the UE 204 is used as the called end (called terminal).

In the embodiment of the present invention, when the UE 201 initiates a videophone call to the UE 204, there are two cases in which the video call falls due to the network resource problem of the originating end:

Case 1: The UE 201 first initiates a video call setup (Setup Video) to the MSC 203 to request to establish a video call. The MSC 203 fails to allocate the radio bearer resource to the UE 201, and the MSC 203 sends a Release Complete message. After the UE 201 receives the prompt, the UE 201 prompts the user to establish a voice call, and establishes a voice call with the UE 204 after the user agrees; Case 2: The video call is successfully established between the UE 201 and the UE 204, but during the call, the wireless resource of the originating end cannot maintain the video call in the call and drop it back to the voice call.

In both cases, the original intention of the UE 201 is to make a video call, but the video call falls back to the voice call due to the network resource problem at the originating end.

In this step, the MSC 203 marks the voice call after detecting that the video call falls back to the voice call.

After marking the voice call, if the RNC 202 detects that there are idle network resources, the MSC 203 is notified, and the MSC 203 preferentially processes the voice call with the mark (for example, requesting the originating end to use the idle network resource to establish the video call again, Switch the current voice TV back to the video call).

Step 102: The originating end MSC detects a network resource status after the video call falls back to the voice call.

In this step, after the video call falls back to the voice call, the MSC 203 detects the status of the network resource, specifically, a video resource available notification message waiting for the RNC to send.

Step 103: The originating end MSC requests the originating terminal to switch the current voice call back to the video call when detecting the network resource that can be used to establish the video call;

In this step, when the MSC 203 receives the video resource available notification message sent by the RNC 202 (the video resource available notification message indicates that the originating end has resources available for establishing a video call), the UE 201 is requested to establish a video call, for example, to the UE 201. Send a video call setup request message (specifically a Setu message).

Step 104: The originating terminal selects whether to switch the current voice call to the video call; if it chooses to switch the current voice call to the video call, step 105 is performed, otherwise, step 106 is performed; in this step, the UE 201 determines whether the current voice call is to be made. Switching to the video call, if the handover is selected, a request confirmation message is sent to the MSC 203 to initiate the handover; otherwise, a request rejection message is sent to the MSC 203, the handover is rejected, and the current voice call is still maintained.

Step 105: The originating end MSC completes the handover from the voice call to the video call after receiving the request to switch the current voice call back to the video call at the originating end;

In this step, the MSC 203 receives the request confirmation message sent by the UE 201, and determines that the UE 201 is connected. By switching the current voice call back to the video call, the switch from the voice call to the video call is completed, a video call is established between the UE 201 and the UE 204, and the previous voice call is cleared.

Step 106: The originating end MSC continues to maintain the current voice call after the originating end rejects the request to switch the current voice call back to the video call.

In this step, the MSC 203 receives the request rejection message sent by the UE 201, continues to hold the current voice call, and clears the tag for the phone.

An embodiment of the present invention provides a method for processing video callback. When a video call is dropped due to insufficient network resources at the originating end, the MSC of the originating end marks the call, and accepts the current at the originating end. After the voice call switches back to the video call request, the initial call terminal is requested to switch the current voice call to the video call, and when the request confirmation message sent by the originating terminal is received, the switch from the voice call to the video call is completed; After the caller refuses to switch the current voice call back to the video call request, it continues to maintain the current voice call, clears the mark on the phone, and solves the problem that the video call cannot be recovered after the video call back, thereby improving the user experience.

Embodiment 2 of the present invention will be described below with reference to the accompanying drawings.

Embodiment 2 of the present invention provides a processing and recovery method for video fallback, when a called terminal wireless resource cannot maintain a current video call during a videophone call, or when a called terminal resource allocation fails to initiate a videophone call, The embodiment of the present invention still uses the application scenario shown in FIG. 2, and the process of using the method to complete the video call recovery is as shown in FIG. 3, including:

Step 301: The video call is detected to fall back to the voice call, and the voice call is marked. In the embodiment of the present invention, when the UE 201 initiates a video call to the UE 204, there are two situations in which the video call falls due to the network resource problem of the called end. :

Case 1: The UE 201 first initiates a video call setup (Setup Video) to the MSC 203 to request to establish a video call. The MSC 203 successfully allocates the radio bearer resource to the UE 201, and the MSC 203 sends a frame message (initial address message) to the MSC 206. The video call is established with the UE 204, and a Call Proceeding message is reported to the UE 201; the MSC 206 sends a Setup message to the UE 204, and the UE 204 checks that a video call can be established, and a Call Confirm message is given. MSC 206; MSC 206 allocates radio bearer resource loss to UE 204 Defeat, send a Release Complete message to the UE 204, and send a Release (REL) message to the MSC 201; the MSC 203 clears the establishment of the video call, and then the UE 201 prompts the user to establish a voice call, and establishes a voice call after the user agrees ;

Case 2: The video call is successfully established between the UE 201 and the UE 204, but during the call, the wireless resource of the called end cannot maintain the video call in the call and drop it back to the voice call.

In both cases, the original intention of UE 201 is to make a video call, but due to the network resource problem of the called end, the video call falls back to the voice call.

In this step, the MSC 206 marks the voice call that has fallen back in the above case. Step 302: The called end MSC detects a network resource status after the video call falls back to the voice call.

In this step, the MSC 206 detects the status of the network resource after the video call falls back to the voice call, specifically waiting for the video resource available notification message sent by the RNC 205.

Step 303: When receiving the video resource available notification message sent by the local RNC, the called MSC sends a video resource available notification message to the originating end MSC, requesting to switch the current voice call back to the video call.

In this step, when the MSC 206 receives the video resource available notification message sent by the RNC 205 (the video resource available notification message indicates that the originating end has resources available for establishing a video call), the MSC 203 requests the MSC 203 to present the current voice. The phone switches back to the video call, such as sending a video resource available notification message to the MSC 203.

Step 304: When detecting the network resource that can be used to establish a video call, the originating terminal MSC requests the originating terminal to switch the current voice call back to the video call;

In this step, after receiving the video resource available notification message sent by the MSC 206, the MSC 203 determines that the video call can be resumed, and therefore sends a video call setup request message to the UE 201 to request to establish a video call.

Step 305: The originating terminal selects whether to switch the current voice call to the video call, if it is selected to switch the current voice call to the video call, step 306 is performed, otherwise, step 307 is performed; in this step, the UE 201 determines whether the current voice is to be The call is switched to the video call. If the switch is selected, a request confirmation message is sent to the MSC 203 to initiate the handover; otherwise, the call is sent to the MSC 203. Send a request rejection message, reject the switch, and still maintain the current voice call.

Step 306: The originating end MSC completes the handover from the voice call to the video call after receiving the request to switch the current voice call back to the video call at the originating end;

In this step, the MSC 203 receives the request confirmation message sent by the UE 201, and completes the handover from the voice call to the video call.

Step 307: The originating end MSC continues to maintain the current voice call after rejecting the request to switch the current voice call back to the video call at the originating end;

Step 308: The originating end MSC notifies the called end MSC to stop requesting handover after the originating end refuses to switch the current voice call back to the video call.

In this step, after the MSC 203 determines in step 307 that the UE 201 refuses to switch the voice call back to the video phone, the MSC 203 notifies the MSC 206 to stop the request to switch the current voice call to the video call, and the MSC 206 clears the tag for the voice call.

The embodiment of the present invention provides a method for processing a video call back. When the video call is dropped due to insufficient network resources of the called end, the MSC of the called end marks the call, and receives the received RNC. When the video resource available notification message, the video resource available notification message is sent to the originating terminal MSC, and the originating terminal MSC further requests the originating terminal to switch the current voice call to a video call, and accepts the current voice at the originating end. After the call is switched back to the video call request, the switch from the voice call to the video call is completed; after the originating call rejects the request to switch the current voice call back to the video call, the mark on the call is cleared, and the call back is resolved. Unrecoverable issues that enhance the user experience.

The embodiment of the present invention further provides an MSC. The structure of the MSC is as shown in FIG. 4, and includes: a network resource detecting module 401, configured to detect a network resource status after the video call is dropped to the voice call;

The handover requesting module 402 is configured to, when the network resource detection module 401 detects a network resource that can be used to establish a video call, request the originating terminal to switch the current voice call back to the video call; The handover execution module 403 is configured to complete the handover from the voice call to the video call after accepting the request to switch the current voice call back to the video call at the originating end.

Further, the handover execution module 403 is further configured to continue to maintain the current voice call after the originating call rejects the request to switch the current voice call back to the video call.

Further, the structure of the handover request module 402 is as shown in FIG. 5, and includes:

The notification receiving unit 4021 is configured to receive a video resource available notification message sent by the originating end RNC or the called end MSC, where the video resource available notification message indicates that the originating end or the called end has resources available for establishing a video call; as well as

The request sending unit 4022 is configured to send a video call setup request message to the originating terminal to request to establish a video call.

Further, the handover requesting module 402 is further configured to: when receiving the video resource available notification message sent by the local RNC, send a video resource available notification message to the originating end MSC, requesting to switch the current voice call back to the video call. .

The embodiment of the present invention further provides a processing system for videophone fallback. The structure of the system is as shown in FIG. 6, including the originating end MSC 601 and the called end MSC 602;

The originating end MSC 601 is configured to detect a network resource status after the video call falls back to the voice call, and when the network resource that can be used to establish the video call is detected, request the originating end to switch the current voice call back to the video call. And accepting the switch from the voice call to the video call after accepting the request to switch the current voice call back to the video call at the originating end;

The called end MSC 602 is configured to detect a network resource status after the video call is dropped to the voice call due to insufficient network resources of the called end, and when receiving the video resource available notification message sent by the local RNC, the The calling MSC 601 sends a video resource available notification message, requesting to switch the current voice call back to the video call, and completing the handover from the voice call to the video call according to the instruction of the originating end MSC 601.

The MSC and the videophone recovery system may be combined with a video phone fallback processing method provided by the embodiment of the present invention. When the video call to the voice call occurs, and the originating end establishes the network resource of the video call, Requesting the current voice call from the originating end MSC to the originating end Switching back to the video call, after accepting the request to switch the current voice call back to the video call at the originating end, completing the switch from the voice call to the video call; after rejecting the request to switch the current voice call back to the video call at the originating end Continue to maintain the current voice call, and solve the problem that the video call cannot be recovered after the video call back, which improves the user experience.

A person skilled in the art can understand that all or part of the steps carried by the method of the foregoing embodiment can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. , including one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present invention may be implemented in the form of hardware, or may be implemented in the form of a software functional module. The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.

The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Industrial applicability

The method, device and system for processing video call fallback provided by the present invention, when the video call is dropped due to insufficient network resources at the originating end, the MSC of the originating end marks the call, and receives the current call at the originating end. After the voice call switches back to the video call request, the initial call terminal is requested to switch the current voice call to the video call, and when the request confirmation message sent by the originating terminal is received, the switch from the voice call to the video call is completed; After the caller refuses to switch the current voice call back to the video call request, it continues to maintain the current voice call and clears the mark on the phone; or; when the video call is dropped due to insufficient network resources of the called end, the called end The MSC marks the phone, and when receiving the video resource available notification message sent by the called end RNC, sends a video resource available notification message to the originating terminal MSC, and the originating terminal MSC further requests the originating terminal to present the current The voice call is switched to a video call, and the current call is accepted at the originating end. After the voice call switches back to the video call request, the switch from the voice call to the video call is completed; after the originating call rejects the request to switch the current voice call back to the video call, the mark on the call is cleared, thereby solving the video call. The problem of being unable to recover after going back improves the user experience.

Claims

Claim

1. A method for processing video call fallback, comprising:

When detecting a network resource that can be used to establish a video call, requesting the originating call to switch the current voice call back to the video call;

After receiving the request to switch the current voice call back to the video call at the originating end, the switching from the voice call to the video call is completed.

2. The method for processing video call fallback according to claim 1, wherein the method further comprises: detecting that the video call is dropped back to the voice before the step of detecting the state of the network resource after the video call is dropped to the voice call Phone, mark the voice call.

The method for processing a video call fallback according to claim 1 or 2, wherein, after detecting the network resource that can be used to establish a video call, after the step of requesting the originating call to switch back to the video call, the The method also includes:

4. The method for processing video call fallback according to claim 1, wherein, when detecting the network resource that can be used to establish a video call, the step of requesting the originating call to switch back to the video call comprises:

The method for processing video call fallback according to claim 1, wherein, when detecting the network resource that can be used to establish a video call, the step of requesting the originating call to switch back to the video call comprises:

6. A method for processing video call fallback, comprising:

Switching from the voice call to the video call is completed in accordance with the indication from the originating terminal MSC.

7. A Mobile Switching Center (MSC) comprising:

a network resource detecting module, configured to detect a network resource status after the video call falls back to the voice call;

8. The MSC according to claim 7, wherein

The handover execution module is further configured to continue to maintain the current voice call after the originating call rejects the request to switch the current voice call back to the videophone.

The MSC according to claim 7, wherein the handover request module comprises: a notification receiving unit configured to receive a video resource available notification message sent by the originating end radio network controller (RNC) or the called end MSC The video resource available notification message indicates that the originating end or the called end has resources available for establishing a video call;

10. The MSC according to claim 7, wherein

The handover request module is further configured to: when receiving the video resource available notification message sent by the local RNC, send a video resource available notification message to the originating terminal MSC, requesting to switch the current voice call back to the video call.

11. A processing system for video call fallback, comprising a originating mobile switching center (MSC) and a called end MSC;

The called end MSC is configured to detect a network resource status after receiving a video call back to the voice call due to insufficient network resources of the called end, and receive a video resource available notification message sent by the local radio network controller (RNC) And sending a video resource available notification message to the originating terminal MSC, requesting to switch the current voice call back to the video call, and completing the handover from the voice call to the video call according to the instruction of the originating end MSC.