WO2014005306A1

WO2014005306A1 - Method and device for reverse switching of video call

Info

Publication number: WO2014005306A1
Application number: PCT/CN2012/078195
Authority: WO
Inventors: 徐小英; 陈东; 吴晓波
Original assignee: 华为技术有限公司
Priority date: 2012-07-04
Filing date: 2012-07-04
Publication date: 2014-01-09
Also published as: CN104081821A; CN104081821B

Abstract

Embodiments of this application relate to a method and device for reverse switching of a video call. The method for reverse switching of a video call comprises: indicating at least one piece of the following information: a switched service type, bearer information used for bearing a switching service type, and port information to a UE, and/or indicating at least one piece of the following information: a switched service type, bearer information used for bearing a switching service type, and port information to an ATCF/ATGW, the switching service type comprising voice switching or voice and video switching. According to the embodiments of this application, a user can still obtain best user experience after reverse switching of a video call by ensuring normal transmission of voice and/or a video between the UE and the ATCF/ATGW when the video call is switched from a CS domain to a PS domain.

Description

Method and device for reverse switching of video call

The present application relates to the field of communications technology and, in particular, to a method and apparatus for reverse switching of video calls. Background technique

In the prior art, the reverse handover of a voice call refers to switching from a circuit switched (CS, Circuit Switch) domain of a Universal Terrestrial Radio Access Network (UTRAN) to an evolved global terrestrial wireless access. E-UTRAN (Evolved Universal Terrestrial Radio Access Network) / High Speed Packet Access (HSPA) Packet switching domain (PS, Packet Switch). Generally, a radio network controller (RNC) sends a handover (HO, Handover) request message to a mobile switching center (MSC, Mobile Switching Center)/media gateway (MGGW) server, and the MSC/MGW server also Send a Session Transfer Notification message to the Access Transfer Control Functionality (ATCF)/Access Transfer Gateway (ATGW), instruct the ATCF/ATGW to prepare to convert the media to the PS domain, usually ATCF With control function, mainly processing signaling, ATGW has user plane function, mainly processing user plane data; ATCF/ATGW provides the assigned ATCF/ATGW media port and codec (Codec) to MSC/MGW server in response message . The MSC/MGW server sends a reverse handover request message to the target mobility management entity (MME, Mobility Management Entity) / General Packet Radio Service (GPRS, General Packet Radio Service) service support node (SGSN, Serving GPRS Support Node The target MME/SGSN informs the base station (e.g., NB/eNB) to allocate resources of the E-UTRAN, and the target MME/SGSN returns a reverse handover response to the MSC/MGW server. Then, the MSC/MGW server sends an HO command message to the radio access network (RAN), and the RAN sends an HO command message to the user equipment (UE, User Equipment). Since the media plane resides at the ATGW of the ATCF/ATGW, the MSC/MGW server sends an access transition preparation request message to the ATCF to trigger the ATCF to perform media path conversion to the IP address and port of the UE on the target side; ATTC/ATGW ATGW, The MSC/MGW server sends an Access Transition Preparation Request message to the ATCF to establish a media path between the ATCF/ATGW and the MSC/MGW server. The UE sends a handover confirmation message to the Radio Network Control (RNC)/eNB, and the RNC/eNB sends a handover notification message to the target MME/SGSN. The target MME/SGSN sends a handover complete message to the MSC/MGW server, and then sends a modify bearer message to the serving gateway (SGW, Serving Gateway), and the SGW forwards the packet data gateway (PGW, Packet Data Gateway) to update the PS bearer context. Thus, voice media surface communication begins immediately. When the UE initiates a session transfer procedure to the ATGW and then establishes a bearer, the voice media (ie, the user plane data generated by the voice call) is sent on the dedicated bearer.

For video calls, video calls are transmitted on only one bearer (eg, Radio Access Bearer (RAB)) in the CS domain and on two bearers in the PS domain (eg, one bearer) Transmit voice, one bearer transmits video). Then, as video calls increase, how to ensure that the video call is reversed from the CS domain to the PS domain becomes an urgent problem to be solved. Summary of the invention

The present application proposes a method and apparatus for reverse handover of a video call to implement reverse handover of a video call from a CS domain to a PS domain.

In one aspect, a method for reverse handover of a video call is provided, including: indicating at least one of the following information of the UE: a service type of handover, bearer information for carrying a handover service type, port information, and/or indicating an ATCF/ATGW At least one of the following information: a service type of handover, bearer information for carrying a handover service type, and port information, where the handover service type includes switching voice, or switching voice and video.

On the other hand, a method for performing reverse handover of a video call includes: obtaining first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type, where the handover service The type includes switching voice or switching voice and video; performing service switching according to the first indication information and/or the second indication information.

On the other hand, a method for performing reverse handover of a video call includes: obtaining third indication information indicating a handover service type, indicating fourth indication information for carrying a bearer of the handover service type, or indicating to be used in a bearer The fifth indication information of the port of the switching service type, where the switching service type includes switching voice, or switching voice and video; and performing service switching according to the third indication information, the fourth indication information, or the fifth indication information. On the other hand, a method for performing reverse handover of a video call includes: obtaining third indication information indicating a handover service type, indicating fourth indication information for carrying a bearer of the handover service type, or indicating to be used in a bearer The fifth indication information of the port of the switching service type, where the switching service type includes switching the voice, or switching the voice and the video; and sending the third indication information, the fourth indication information, or the fifth indication information to the user device.

On the other hand, an apparatus for performing reverse handover of a video call includes: a first indication unit, configured to indicate at least one of the following information of the UE: a service type of handover, bearer information for carrying a handover service type, and port information. And/or indicating at least one of the following information of the ATCF/ATGW: a service type of handover, bearer information for carrying a handover service type, port information, wherein the handover service type includes switching voice, or switching voice and video.

On the other hand, an apparatus for performing reverse handover of a video call includes: a second obtaining unit, configured to acquire first indication information indicating a handover service type, and/or to indicate a bearer for carrying the handover service type The second indication information, where the handover service type includes switching the voice or switching the voice and the video; and the first switching unit is configured to perform service switching according to the first indication information and/or the second indication information.

On the other hand, an apparatus for performing reverse handover of a video call includes: a third obtaining unit, configured to acquire third indication information indicating a handover service type, and a fourth indication indicating a bearer for carrying the handover service type The information or the fifth indication information that is used to carry the port of the handover service type, where the handover service type includes switching voice, or switching voice and video; and the second switching unit is configured to use, according to the third indication information, the fourth The indication information or the fifth indication information performs service switching.

On the other hand, an apparatus for performing reverse handover of a video call includes: a fourth obtaining unit, configured to acquire third indication information indicating a handover service type, and a fourth indication indicating a bearer for carrying the handover service type The information or the fifth indication information that is used to carry the port of the handover service type, where the handover service type includes switching voice, or switching voice and video; and sending, for sending the third indication information, the fourth The indication information or the fifth indication information is sent to the user equipment.

The embodiment of the present application can ensure the normal transmission of voice and/or video between the UE and the ATCF/ATGW when the video call is switched from the CS domain to the PS domain, so that the user still obtains the best after the reverse handover of the video call. User experience. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings to be used in the embodiments of the present application will be briefly described below. Obviously, the drawings described below are only some embodiments of the present application. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a flow chart of a method of reverse handoff of a video call in accordance with one embodiment of the present application. 2 is a flow chart of a method of reverse switching of a video call in accordance with another embodiment of the present application. 3 is a flow chart of a method of reverse switching of a video call in accordance with another embodiment of the present application. 4 is a flow chart of a method of reverse switching of a video call in accordance with another embodiment of the present application. Figure 5 is a block diagram showing the structure of an apparatus for reverse switching of a video call according to an embodiment of the present application.

Figure 6 is a block diagram showing the structure of an apparatus for reverse switching of a video call according to an embodiment of the present application.

Figure 7 is a block diagram showing the structure of an apparatus for reverse switching of a video call according to another embodiment of the present application.

Figure 8 is a block diagram showing the structure of an apparatus for reverse switching of a video call according to another embodiment of the present application.

Figure 9 is a block diagram showing the structure of an apparatus for reverse switching of a video call according to still another embodiment of the present application. detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without making creative labor are within the scope of the present application.

The technical solution of the present application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access ( WCDMA, Wideband Code Division Multiple Access Wireless), General Packet Radio Service (GPRS), Long Term Evolution (LTE), etc.

The UE can also be called a mobile terminal (Mobile Terminal), a mobile station (Mobile Station). And so on, it can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network). The user equipment exchanges voice and/or data with the wireless access network.

The base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a radio network controller (RNC, Radio Network Control) in WCDM A, or may be an evolved base station (eNB or e in LTE). -NodeB, evolutional Node B), the application is not limited, but for convenience of description, the following embodiments are described by taking an eNB as an example.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B These three situations. In addition, the character "/" in this article can indicate that the contextual object is an "or" relationship, and can also represent the relationship of the "collection" of the network element.

During the reverse handover of the video call, the MSC/MGW server will instruct the UE or ATCF/ATGW to switch voice and/or video and further indicate the bearer carrying the voice and/or video stream. The flow of the method of reverse switching of a video call according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings. As shown in Figure 1, the following steps are included.

11 . The MSC/MGW server may indicate at least one of the following information of the UE: a service type of the handover, bearer information for carrying the handover service type, port information, and/or at least one of the following information indicating the ATCF/ATGW: The service type of the handover, the bearer information and the port information used to carry the handover service type.

Specifically, the MSC/MGW server indicates that the bearer information used by the UE to carry the handover service type includes one or two bearer identifiers; and the MSC/MGW server indicates that the port information used by the UE to carry the handover service type includes an uplink port. . The MSC/MGW server indicates that the bearer information used by the ATCF/ATGW to carry the handover service type includes one or two bearer identifiers; the MSC/MGW server instructs the ATCF/ATGW to carry the port information of the handover service type, including the downlink. port.

Through the indication of the above MSC/MGW server, the embodiment of the present application enables the user to make a video call by ensuring normal transmission of voice and/or video between the UE and the ATCF/ATGW when the video call is switched from the CS domain to the PS domain. The reverse user experience still achieves the best user experience.

In the above, the MSC/MGW server can switch the service type by the network management or the system in advance.

In addition, the MSC/MGW server can also make its own decisions to determine the type of handover service. The MSC/MGW server obtains decision information of the handover service type, where the handover service type includes switching voice, or switching voice and video.

For example, the MSC/MGW server may obtain the decision information of the handover service type by using at least one of the following information: according to the emergency call, the capability of the UE to support the reverse handover of the video call, and the number of PDP contexts that the UE has (for example, only one) The PDP indicates reverse handover), the ability to support reverse handover of video calls according to the indication of the target MME/SGSN, or the local network and/or the target network.

And according to the decision information, the MSC/MGW server instructs the UE to perform service switching according to the handover service type and/or instruct the ATCF/ATGW to perform service transmission according to the handover service type.

In general, the MSC/MGW server may display, according to the decision information, the UE to perform service switching according to the handover service type, and instruct the ATCF/ATGW to perform service transmission according to the handover service type. The MSC/MGW server may also implicitly instruct the UE to perform service switching according to the handover service type according to the decision information, and/or instruct the ATCF/ATGW to perform service transmission according to the handover service type.

Specifically, the MSC/MGW server may trigger the UE to perform service switching according to the handover service type, for example, during a CS call or after a CS call is established, or when receiving a reverse handover request message sent by the source RAN node. Or after receiving the handover response of the target CN node, or after receiving the reverse handover capability of the UE sent by the RNC.

Specifically, the MSC/MGW server may trigger the ATCF/ATGW to perform service transmission according to the handover service type, for example, according to the information of the handover service type received from the target MME/SGSN (for example, in the reverse handover response message). ), or according to the information of the handover service type (for example, the reverse handover request message) received from the source RNC/Base Station Controller (BSC).

Accordingly, a method of reverse switching of a video call on the ATCF/ATGW side and a method of reverse switching of a video call on the UE side will be described in detail below with reference to Figs. 2 and 3. For the sake of explanation, the description overlapping with the above method flow will be omitted.

As shown in FIG. 2, the method for reverse switching of a video call on the ATCF/ATGW side includes the following steps. The ATCF/ATGW obtains first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type, where the handover service type includes switching voice, or switching voice and video.

Specifically, the ATCF/ATGW may obtain first indication information indicating a handover service type from the target MME/SGSN and/or second indication information indicating a bearer for carrying the handover service type. The ATCF/ATGW can also obtain the first indication information indicating the handover service type and/or the bearer for carrying the handover service type from the MSC/MGW server by the UE to support the video reverse handover capability. The second indication.

Further, when the first indication information indicates that the handover service type is handover voice and video, the second indication information indicates that the UE allocates two uplink ports. Or, when the first indication information indicates that the handover service type is the handover voice, the second indication information indicates that the UE allocates two uplink ports and is used for restoring video, or indicates that the UE is allocated one uplink port, the one indication The upstream port is used for voice and does not resume video.

22. The ATCF/ATGW performs a service switch according to the first indication information and/or the second indication information.

It can be seen that the embodiment of the present application can ensure the normal transmission of voice and/or video between the UE and the ATCF/ATGW when the video call is switched from the CS domain to the PS domain, so that the user still after the reverse call of the video call. Get the best user experience.

As shown in FIG. 3, the method for reverse switching of a video call on the UE side includes the following steps.

31. The UE obtains third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or fifth indication information indicating a port for carrying the handover service type, where the handover is performed. Business types include switching voices or switching voice and video.

For example, the UE may obtain third indication information indicating a handover service type from the MSC/MGW, fourth indication information indicating a bearer for carrying the handover service type, or fifth indicating a port for carrying the handover service type. Instructions.

Or, by using the handover command sent by the source RNC/BSC, the UE may learn the port of the voice or video allocated by the ATCF/ATGW, the third indication information indicating the type of the handover service, or the bearer indicating the type of the handover service. Fourth indication information.

32. The UE performs service switching according to the third indication information, the fourth indication information, or the fifth indication information.

It can be seen that the embodiment of the present application can be used when the video call is switched from the CS domain to the PS domain. The normal transmission of voice and/or video between the UE and the ATCF/ATGW is maintained, so that the user still obtains the best user experience after the reverse handover of the video call.

As shown in FIG. 4, the method for reverse switching of a video call on the RNC side includes the following steps.

The RNC obtains third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or fifth indication information indicating a port for carrying the handover service type, where the handover is performed. Business types include switching voices, or switching voice and video.

For example, the RNC may obtain, from the MSC/MGW, third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or fifth indicating a port for carrying the handover service type. Instructions.

The RNC sends the third indication information, the fourth indication information, or the fifth indication information to the user equipment.

For example, the RNC may send the third indication information, the fourth indication information, or the fifth indication information to the user equipment by using the radio resource control RRC signaling.

The following describes a handover service type, such as a handover, between a UE and an ATCF/ATGW coordinated by a non-access stratum (NAS, Non-Access Stratum) or an access stratum (AS, Access Stratum), in conjunction with a specific embodiment. Voice or switch voice and video, and further coordinate the bearer of the service transmission. After the NAS or AS completes the coordination, the UE and the ATCF/ATGW determine whether to transmit voice and/or video.

In general, multiple nodes in the network can decide to switch service types. For example, the target MME/SGSN may be based on whether the current call established by the UE on the source MME/SGSN side is an emergency call, whether the UE supports reverse handover of the video call, and the number of PDP (Packet Data Protocol) contexts the UE has. Or, according to the indication of the eNB, it is determined whether the handover service type is to switch voice or switch voice and video. For example, the UE may decide whether to switch the service type to switch voice or switch voice and video according to whether it supports the reverse handover of the video call or the number of PDP contexts that it has. For example, the target RNC or eNB may decide whether to switch voice or switch voice and video according to resource usage or local policy decision. For example, the source RNC may support video according to the capabilities of the UE or according to the local network and/or the target network. The ability to reverse the nature of a call to switch the service type is to switch voice or switch voice and video. Specifically, if the call is an emergency call, or the UE does not support the reverse handover capability of the video call, or the UE has only one PDP context, or the local network and/or the target network does not support the reverse handover capability of the video call. In this case, the type of the handover service that is decided is switched voice, otherwise the service type is switched to switch voice and video.

In addition, the source MSC/MGW may have the capability according to whether the current call of the UE is an emergency call, whether the UE supports reverse handover of the video call, whether the local network and/or the target network support reverse handover of the video call, and the UE has The number of Packet Data Protocol (PDP) contexts, or whether to switch the service type according to the indication of the target MME/SGSN is to switch voice or switch voice and video. The ability of the network to support the reverse handover of video calls may be specific to a Routing Area Identity (RAI), Local Area Identity (LAI), and Location Area Identity (TAI, Tracking Area). Identity) or Public Land Mobile Network Identity (PLMN ID).

After the decision, the foregoing node may display the information in the NAS signaling to display or implicitly instruct the UE to perform service switching according to the handover service type, and/or instruct the ATCF/ATGW to perform the handover service type. Business delivery. In addition, the bearer information and/or port information used by the UE to carry the handover service type may be further indicated, and/or the bearer information and/or port information used by the ATCF/ATGW to carry the handover service type may be indicated.

As an example of the display indication, the above node may indicate switching of voice or switching voice and video in the decision information. The above node may further indicate bearer information and/or port information carrying the handover service type. The 7-package information may include a 7-digit identifier, such as a RAB ID. The port information includes an uplink and/or downlink port indicating that the UE is used to carry the handover service type, or indicates that the ATCF/ATGW is used to carry the handover service type. Downstream and/or upstream ports.

As an example of the implicit indication, the foregoing node may implicitly indicate that the UE switches voice or switches voice and video in the number of uplink ports indicated in the decision information. For example, if the number of uplink ports is 1, it is equivalent to instructing the UE to switch voices. If the number of uplink ports is greater than or equal to 2, it is equivalent to instructing the UE to switch voice and video. When the number of uplink ports is greater than or equal to 2, the foregoing nodes may determine uplink ports carrying voice and video streams according to the order or parity of the uplink ports. For example, the first port is used to carry voice and the second port is used to carry video.

As an example of the implicit indication, the foregoing node may implicitly instruct the ATCF/ATGW to switch voice or switch voice and video in the number of uplink ports indicated in the decision information, for example, if uplink If the number of ports is greater than or equal to 2, it is equivalent to instructing the ATCF/ATGW to switch voice and video. One port carries voice and the other port carries video.

As an example of the implicit indication, the foregoing node may implicitly instruct the UE or the ATCF/ATGW to switch voice or switch voice and video in the bearer service type indicated in the decision information, and further pass the allocation and preemption priority (APR, Allocation) The value of the Quality of Service Class Identity (QCI) indicates the bearer information and/or port information used to carry the handover service type. For example, if the service type is a session type, it is equivalent to indicating switching of voice; if the service type is stream, it is equivalent to indicating switching of voice and video. For example, voice bearers are carried in high ARP bearers, and video bearers are carried in low ARP bearers. For example, a low QCI value indicates bearer voice (eg, when QCI is 1), and a QCI high indicates bearer video.

In addition, as an example of the implicit indication, the UE may also determine whether to switch the voice or switch the bearer of the voice and video according to the combined configuration of the bearers. For example, for a high rate of 64 kbps, the decision switches voice and video; for low rates, the decision switches voice. In addition, if the UE has indicated the ATCF/ATGW port for voice and video when registering, after receiving the uplink port corresponding to the voice and video allocated by the ATCF/ATGW, the UE determines to use the corresponding relationship according to the indication at the time of registration. An upstream port carrying voice and video switching. In addition, if the UE has indicated the bearer corresponding to the type of the handover service, the UE sends the corresponding service type on the corresponding bearer after receiving the handover command.

The timing at which the MSC/MGW server triggers the indication of the ATCF/ATGW is:

The MSC/MGW server receives the handover type information indicated by the target MME/SGSN, for example, in a reverse handover response message; or

The MSC/MGW server receives the reverse handover request message sent by the source RNC/BSC.

The timing at which the target MME/SGSN triggers the indication of the ATCF/ATGW is:

The target MME/SGSN receives the reverse handover request message sent by the MSC/MGW.

The timing at which the UE triggers the indication of the ATCF/ATGW is:

During the IMS registration process, the UE notifies the ATCF/ATGW of the ability of the UE to support reverse handover of the video call; or

During the IMS registration process, the UE instructs the ATCF/ATGW to allocate a downlink port for the UE to carry voice and video.

The timing of the MSC/MGW server triggering indication UE is:

During a CS call or after a CS call is established; or Receiving a reverse handover request message sent by the source RAN node; or

After receiving the reverse handover response sent by the target CN node; or

After receiving the ability to reverse the handover of the video call of the UE transmitted by the source RNC.

In the following, from the perspective of the MSC/MGW server, a method of how to implement reverse handover of a video call according to an embodiment of the present application in a NAS or an AS will be separately explained.

The configuration information indicating the UE's reverse handover with respect to the video call through the non-access stratum NAS message is explained in the first embodiment. Here, it is assumed that the UE supports reverse handover of a video call.

In the first case, the MSC/MGW server instructs the UE to switch to 2 bearers.

For example, the MSC/MGW server may instruct the UE to switch voice and video and further indicate the bearer, or may negotiate a bearer for carrying the switched voice and video when the UE activates the PDP in the PS domain. The MSC/MGW server may instruct the ATCF/ATGW to switch voice and video and further indicate the bearer.

Alternatively, the MSC/MGW server may instruct the UE to switch only the voice, and then initiate the establishment of the video bearer after the voice switching is completed.

For example, the MSC/MGW server instructs the UE to switch only the voice, and further indicates the bearer carrying the switched voice, or can negotiate the bearer carrying the switched voice when the PDP is activated. The MSC/MGW server instructs the ATCF/ATGW to switch only the voice and further indicates the bearer carrying the voice.

In the second case, the MSC/MGW server instructs the UE to switch to 1 bearer.

For example, the MSC/MGW server can instruct the UE to switch voice and video. The MSC/MGW server may instruct the ATCF/ATGW to switch voice and video and further instruct the ATCF/ATGW to allocate 2 uplink ports to the UE.

For example, the MSC/MGW server can instruct the UE to only switch voice. The MSC/MGW server may instruct the ATCF/ATGW to switch only the voice, and further instruct the ATCF/ATGW to allocate two uplink ports to the UE if the video is to be restored, and allocate one uplink port to the UE if the video is not restored.

The configuration information indicating the reverse handover of the UE with respect to the video call by the access layer AS message is explained in the second embodiment.

For the reverse handover scenario of the reserved video call: After the UE registers with the Internet Protocol Multimedia Subsystem (IMS), the UE performs two bearer context PDPs for the reverse handover of the video call in the PS domain. .

For non-special reserved video reverse switching scenarios: Switch to the default bearer. For example, for the UE. If the MSC/MGW server implicitly indicates handover of voice and video, the MSC/MGW server implicitly indicates that the UE can carry voice and video through two downlink ports; or, the MSC/MGW server implicitly instructs the ATCF/ATGW to pass two The upstream port carries voice and video. Alternatively, the MSC/MGW server may indicate to the UE to switch voice and video by sending a handover command to the source RNC. At this time, ATCF/AGTW can allocate 2 uplink ports to the UE.

Optionally, the MSC/MGW may also instruct the ATCF/ATGW to switch the service type to switch voice, such as temporarily switching only the voice. Then, after the ATCF/ATGW completes the voice handover, the ATCF/ATGW initiates the establishment of the bearer of the video to resume the video transmission. For the uplink port allocated by the ATCF/ATGW to the UE, the MSC/MGW server may send the UE to the UE through a handover command. Alternatively, after the UE completes the voice handover, the UE initiates the establishment of the bearer of the video to resume the video transmission. For the uplink port allocated by the ATCF/ATGW to the UE, the MSC/MGW server may send the UE to the UE through a handover command.

The apparatus involved in reverse handover of a video call according to an embodiment of the present application, such as an MSC/MGW server, an ATCF/ATGW, and a user equipment or a part of these apparatuses, will be described below with reference to the accompanying drawings.

As shown in FIG. 5, the means for reverse switching of the video call (e.g., MSC/MGW server) 50 includes a determining unit 51 and a first indicating unit 52. The determining unit 51 is configured to determine a service type of the UE handover and/or bearer information and/or port information for carrying the handover service type, and/or a service type of the ATCF/ATGW handover and/or a handover service type. Bearer information and/or port information, wherein the handover service type includes switching voice, or switching voice and video. The first indication unit 52 is configured to indicate at least one of the following information of the UE: a service type of the handover, bearer information for carrying the handover service type, port information, and/or at least one of the following information indicating the ATCF/ATGW: the handover Service type, bearer information used to carry the handover service type, and port information.

Further, the bearer information used by the UE indicated by the first indication unit 52 to carry the handover service type includes identifiers of one or two bearers. The port information used by the first indication unit 52 to carry the handover service type includes an uplink port.

Further, the bearer information used by the ATCF/ATGW indicated by the first indication unit 52 to carry the handover service type includes an identifier of one or two bearers. The port information used by the ATCF/ATGW to be used by the first indication unit 52 to carry the handover service type includes a downlink port. Further, in addition to the determining unit 51 and the first indicating unit 52, the device for reverse switching of the video call (for example, the MSC/MGW server) 60 may further include the first obtaining unit 53 and the second indicating unit 54. The first obtaining unit 53 is configured to obtain decision information of a handover service type, where the handover service type includes switching voice, or switching voice and video. The second indication unit 54 is configured to: according to the decision information, instruct the UE to perform service switching according to the handover service type, and/or instruct the ATCF/ATGW to perform service transmission according to the handover service type. , as shown in Figure 5.

Optionally, the first obtaining unit 53 acquires at least one of the following information: according to an emergency call, a capability of the UE to support reverse handover of the video call, a number of PDP contexts that the UE has, an indication according to the target MME/SGSN, or a local network. And/or the ability of the target network to support reverse switching of video calls.

Optionally, the second indication unit 54 is specifically configured to: according to the decision information, explicitly indicate that the UE performs service switching according to the handover service type, and/or instruct the ATCF/ATGW to perform service transmission according to the handover service type. Alternatively, the second indication unit 54 is specifically configured to implicitly instruct the UE to perform service switching according to the handover service type according to the decision information, and/or instruct the ATCF/ATGW to perform service transmission according to the handover service type.

Optionally, the second indication unit 54 is specifically configured to: when the CS call is established or after the CS call is established, instruct the UE to perform service switching according to the handover service type. Alternatively, the second indication unit 54 is configured to: when receiving the reverse handover request message sent by the source RAN node, instructing the UE to perform service switching according to the handover service type. Alternatively, the second indication unit 54 is specifically configured to: after receiving the reverse handover response sent by the target CN node, instruct the UE to perform service switching according to the handover service type. Or, the second indication unit 54 is specifically configured to: after receiving the capability of the reverse handover of the video call of the UE sent by the source RNC/BSC, instruct the UE to perform service switching according to the handover service type.

In addition, the second indication unit 54 is specifically configured to instruct the ATCF/ATGW to perform service transmission according to the handover service type according to the reverse handover response message received from the target MME/SGSN. Alternatively, the second indication unit 54 is specifically configured to instruct the ATCF/ATGW to perform service transmission according to the handover service type according to the reverse handover request message received from the source RNC/BSC.

The embodiment of the present application can ensure the normal transmission of voice and/or video between the UE and the ATCF/ATGW when the video call is switched from the CS domain to the PS domain, so that the user still obtains the best after the reverse handover of the video call. User experience.

As shown in FIG. 7, a device for reverse switching of a video call (for example, ATCF/ATGW) 70 A second acquisition unit 71 and a first switching unit 72 are included. The second obtaining unit 71 is configured to acquire first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type, where the handover service type includes switching voice or switching voice and video. . The first switching unit 72 is configured to perform service switching according to the first indication information and/or the second indication information.

The first indication information indicates that the handover service type is handover voice and video, and/or the second indication information indicates that the UE is allocated two uplink ports. Or, when the first indication information indicates that the handover service type is a handover voice, the second indication information indicates that the UE allocates two uplink ports for restoring video, or indicates that the UE is allocated one uplink port for not restoring video. .

Specifically, the second obtaining unit 71 is configured to acquire, from the target MME/SGSN, first indication information indicating a handover service type and/or second indication information indicating a bearer used to carry the handover service type. Alternatively, the second obtaining unit 71 is configured to obtain, from the MSC/MGW server, first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type. Alternatively, the second obtaining unit 71 is configured to acquire first indication information indicating a handover service type and/or a second indication indicating a bearer for carrying the handover service type, from a capability of the reverse handover that supports the video call sent by the UE. information.

As shown in FIG. 8, the means (for example, user equipment) 80 for reverse switching of a video call includes a third obtaining unit 81 and a second switching unit 82. The third obtaining unit 81 is configured to acquire third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or fifth indicating a port for carrying the handover service type. Instructing information, wherein switching the type of service includes switching voices, or switching voices and videos. The second switching unit 82 is configured to perform service switching according to the third indication information, the fourth indication information, or the fifth indication information.

Specifically, the third obtaining unit 81 is configured to acquire, from the MSC/MGW, third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or indication for carrying the handover service. The fifth indication of the type of port.

Optionally, the third obtaining unit 81 is configured to learn, by using a handover command, a port for voice or video allocated by the ATCF/ATGW from the source RNC/BSC, third indication information indicating a handover service type, or indication for carrying the Switching the fourth indication information of the bearer of the service type. The embodiment of the present application can ensure the normal transmission of voice and/or video between the UE and the ATCF/ATGW when the video call is switched from the CS domain to the PS domain, so that the user still obtains the best after the reverse handover of the video call. User experience.

As shown in FIG. 9, the means (e.g., RNC) 90 for reverse switching of a video call includes a fourth obtaining unit 91 and a transmitting unit 92. The fourth obtaining unit 91 is configured to acquire third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or a port indicating a port for carrying the handover service type. Five indication information, wherein the handover service type includes switching voice, or switching voice and video. The sending unit 92 is configured to send the third indication information, the fourth indication information, or the fifth indication information to the user equipment.

Optionally, the fourth obtaining unit 91 may obtain, from the mobile switching center MSC/media gateway MGW, third indication information indicating a handover service type, fourth indication information indicating an bearer for carrying the handover service type, or indication for And transmitting fifth indication information of the port of the handover service type.

Optionally, the sending unit 92 may send the third indication information, the fourth indication information, or the fifth indication information to the user equipment by using the radio resource control RRC signaling.

It should be understood that the aspects described in each of the claims of the present application should also be considered as an embodiment, and the features in the claims may be combined, such as the steps of the different branches of the execution after the determining step in the present application. It can be used as a different embodiment.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in a combination of electronic hardware or computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functionality for each particular application, but such implementation should not be considered to be beyond the scope of the application.

It will be apparent to those skilled in the art that, for the convenience of the description and the cleaning process, the specific operation of the system, the device and the unit described above may be referred to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be Ignore, or not execute. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or the part contributing to the prior art or the part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .

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

Claims

Rights request

A method for reverse switching a video call, comprising:

Indicating at least one of the following information of the user equipment: a service type of the handover, bearer information for the handover service type, port information, and/or at least one of the following information indicating the access transition control function ATCF/Access Transition Gateway ATGW A: a service type of the handover, bearer information for carrying the handover service type, and port information, where the handover service type includes switching voice, or switching voice and video.

2. The method of claim 1 wherein

The bearer information indicating that the user equipment is used to carry the handover service type includes one or two bearer identifiers; or

The port information indicating that the user equipment is used to carry the handover service type includes an uplink port.

3. The method of claim 1 wherein:

The bearer information indicating that the ATCF/ATGW is used to carry the handover service type includes one or two identifiers; or

The port information indicating that the ATCF/ATGW is used to carry the handover service type includes a downlink port.

The method according to any one of claims 1 to 3, wherein before the indicating the type of service switched by the user equipment, and/or indicating the type of service switched by the ATCF/ATGW, the method further includes:

Obtaining decision information of the handover service type;

And indicating, according to the decision information, that the user equipment performs service switching according to the handover service type, and/or instructs the ATCF/ATGW to perform service transmission according to the handover service type.

The method according to claim 4, wherein the obtaining the decision information of the handover service type includes at least one of the following information:

The capability of the reverse call according to the emergency call, the user equipment supporting the video call, the number of packet data protocol PDP contexts that the user equipment has, the indication according to the target mobility management entity MME/General Packet Radio Service Technical Service Support Node SGSN, or The ability of the local network and/or the target network to support reverse switching of video calls.

6. The method according to claim 4 or 5, wherein the decision is based on the decision Information indicating that the user equipment performs service switching according to the handover service type, and/or indicates

The ATCF/ATGW performs service transmission according to the handover service type, including:

Determining, according to the decision information, the user equipment to perform service switching according to the handover service type, and/or instructing the ATCF/ATGW to perform service transmission according to the handover service type; or

And according to the decision information, implicitly instructing the user equipment to perform service switching according to the handover service type, and/or instructing the ATCF/ATGW to perform service transmission according to the handover service type.

The method according to any one of claims 4 to 6, wherein the indicating that the UE performs the service switching according to the handover service type comprises:

In the circuit switched domain CS call or after the circuit switching domain CS call is established, the user equipment is instructed to perform service switching according to the switching service type; or

Receiving a reverse handover request message sent by the RAN node of the source radio access network, instructing the UE to perform service switching according to the handover service type; or

After receiving the reverse handover response sent by the CN node of the target core network, instructing the UE to perform service switching according to the handover service type; or

After receiving the capability of the reverse handover of the video call of the user equipment sent by the source radio network controller RNC/base station controller BSC, the user equipment is instructed to perform the service handover according to the handover service type.

The method according to any one of claims 4 to 7, wherein the instructing the ATCF/ATGW to perform the service transmission according to the handover service type comprises:

The reverse handover response message received by the SGSN, instructing the ATCF/ATGW to perform service transmission according to the handover service type; or

According to the reverse handover request message received from the source radio network controller RNC/base station controller BSC, the ATCF/ATGW is instructed to perform traffic transmission according to the handover service type.

9. A method for reverse switching a video call, comprising:

Obtaining first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type, where the handover service type includes switching voice or switching voice and video;

Performing service switching according to the first indication information and/or the second indication information.

10. The method of claim 9 wherein: When the first indication information indicates that the handover service type is handover voice and video, and/or the second indication information indicates that the user equipment is allocated two uplink ports; or

When the first indication information indicates that the handover service type is a handover voice, the second indication information indicates that the user equipment is allocated two uplink ports for restoring video, or that the user equipment is allocated one uplink port for not restoring video. .

The method according to claim 9 or 10, wherein the obtaining the first indication information indicating the handover service type and/or the second indication information indicating the bearer for carrying the handover service type comprises: The SGSN obtains first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type; or

And obtaining, by the mobile switching center MSC/media gateway MGW server, first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type; or

The ability to support the reverse handover of the video call sent by the user equipment acquires first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type.

12. A method for reverse switching a video call, comprising:

Obtaining third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or fifth indication information indicating a port for carrying the handover service type, where the handover service type includes Switch voice, or switch voice and video;

Performing service switching according to the third indication information, the fourth indication information, or the fifth indication information.

The method according to claim 12, wherein the obtaining the third indication information indicating the handover service type, the fourth indication information indicating the bearer for carrying the handover service type, or the indication for the bearer The fifth indication information of the port for switching the service type includes:

Obtaining, by the mobile switching center MSC/media gateway MGW, third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or indicating a port for carrying the handover service type Five instructions.

The method according to claim 12 or 13, wherein the acquiring third indication information indicating a handover service type, and indicating a fourth bearer for carrying the handover service type The indication information or the fifth indication information indicating the port for carrying the handover service type includes: obtaining, by the handover command, the access transition control function ATCF/access transition gateway ATGW from the source radio network controller RNC/base station controller BSC a port for voice or video assigned thereto, third indication information indicating a handover service type, or fourth indication information indicating a bearer for carrying the handover service type.

15. A method for reverse switching a video call, comprising:

And transmitting the third indication information, the fourth indication information, or the fifth indication information to the user equipment.

The method according to claim 15, wherein the obtaining the third indication information indicating the handover service type, the fourth indication information indicating the bearer for carrying the handover service type, or the indication for the bearer The fifth indication information of the port for switching the service type includes:

The method according to claim 12 or 13, wherein the sending the third indication information, the fourth indication information or the fifth indication information to the user equipment comprises: controlling by using radio resources The RRC signaling, the third indication information, the fourth indication information, or the fifth indication information is sent to the user equipment.

18. A device for reverse switching a video call, comprising:

a determining unit, configured to determine a service type of the user equipment handover and/or bearer information and/or port information used for the handover service type, and/or a service type of the access translation control function ATCF/access switching gateway ATGW And/or bearer information and/or port information for carrying a handover service type, where the handover service type includes switching voice, or switching voice and video;

The first indication unit is configured to indicate at least one of the following information of the user equipment: a service type of the handover, bearer information for carrying the handover service type, port information, and/or an access transition control function ATCF/access translation gateway ATGW At least one of the following information: the type of service to be handed over, bearer information for carrying the type of handover service, and port information.

19. Apparatus according to claim 18 wherein: The bearer information used by the user equipment that is used by the first indication unit to carry the handover service type includes one or two bearer identifiers;

The port information used by the user equipment indicated by the first indication unit to carry the handover service type includes an uplink port.

20. Apparatus according to claim 18, wherein:

The bearer information of the access switching control function ATCF/the access switching gateway ATGW that is used by the first indication unit to carry the handover service type includes an identifier of one or two bearers; The inbound switching control function ATCF/access switching gateway ATGW is configured to carry the port information of the switching service type including a downlink port.

The device according to any one of claims 18 to 20, further comprising: a first obtaining unit, configured to acquire decision information of a handover service type;

a second indication unit, configured to: according to the decision information, instruct the user equipment to perform service switching according to the handover service type, and/or instruct the access transition control function ATCF/accession switching gateway ATGW to perform services according to the handover service type Transfer.

22. The apparatus according to claim 21, wherein the first obtaining unit obtains at least one of the following information:

The device according to claim 21 or 22, wherein the second indicating unit is specifically configured to:

The device according to any one of claims 21 to 23, wherein the second indicating unit is specifically configured to:

Instructing the user equipment to perform service switching according to the handover service type during a circuit switched domain CS call or after a circuit switched domain CS call is established; or Receiving a reverse handover request message sent by the RAN node of the source radio access network, instructing the UE to perform service switching according to the handover service type; or

After receiving the reverse handover capability of the video call of the UE sent by the source radio network controller RNC/base station controller BSC, the UE is instructed to perform service switching according to the handover service type.

The device according to any one of claims 21 to 24, wherein the second indicating unit is specifically configured to:

And instructing the ATCF/ATGW to perform service transmission according to the handover service type according to the reverse handover response message received from the target MME/SGSN; or

According to the reverse handover request message received from the source RNC/BSC, the ATCF/ATGW is instructed to perform traffic transmission according to the handover service type.

26. A device for reverse switching a video call, comprising:

a second obtaining unit, configured to acquire first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type, where the handover service type includes switching voice or switching voice and video;

The first switching unit is configured to perform service switching according to the first indication information and/or the second indication information.

27. Apparatus according to claim 26 wherein:

When the first indication information indicates that the handover service type is switching voice and video, and/or the second indication information indicates that the user equipment is allocated two uplink ports; or

The device according to claim 26 or 27, wherein the second acquiring unit is specifically configured to:

Take up

The SGSN obtains first indication information indicating a handover service type and/or second indication information indicating a bearer for carrying the handover service type; or

Obtaining, from the mobile switching center MSC/media gateway MGW server, first indication information indicating a handover service type and/or a second indication indicating a bearer for carrying the handover service type Information; or,

29. A device for reverse switching of a video call, comprising:

a third acquiring unit, configured to acquire third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or a fifth indication indicating a port for carrying the handover service type Information, wherein the switching service type includes switching voices, or switching voices and videos;

And a second switching unit, configured to perform service switching according to the third indication information, the fourth indication information, or the fifth indication information.

30. The device according to claim 29, wherein the third acquiring unit is specifically configured to:

The device according to claim 29 or 30, wherein the third acquiring unit is specifically configured to:

Obtaining, from the source radio network controller RNC/base station controller BSC, a port for voice or video allocated by the access switching control function ATCF/access switching gateway ATGW, a third indication information or indication indicating a handover service type by using a handover command And fourth indication information for carrying the bearer of the handover service type.

32. A device for reverse switching of a video call, comprising:

a fourth obtaining unit, configured to acquire third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or a fifth indication indicating a port for carrying the handover service type Information, wherein the switching service type includes switching voices, or switching voices and videos;

And a sending unit, configured to send the third indication information, the fourth indication information, or the fifth indication information to the user equipment.

The device according to claim 32, wherein the fourth acquiring unit is specifically configured to: Obtaining, by the mobile switching center MSC/media gateway MGW, third indication information indicating a handover service type, fourth indication information indicating a bearer for carrying the handover service type, or indicating a port for carrying the handover service type Five instructions.

The device according to claim 32 or 33, wherein the transmitting unit is specifically configured to:

And transmitting, by the RRC signaling, the third indication information, the fourth indication information, or the fifth indication information to the user equipment.