CN1581997A - Method for realizing circuit domain multimedia business backspace to voice business - Google Patents
Method for realizing circuit domain multimedia business backspace to voice business Download PDFInfo
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- CN1581997A CN1581997A CN 03149745 CN03149745A CN1581997A CN 1581997 A CN1581997 A CN 1581997A CN 03149745 CN03149745 CN 03149745 CN 03149745 A CN03149745 A CN 03149745A CN 1581997 A CN1581997 A CN 1581997A
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Abstract
The method includes steps: (1) after receiving service request of multimedia from calling party, called party carries out service authentication; if called party does not support multimedia, message of not supporting multimedia service is returned; (2) the calling party builds voice communication with called party. The invention solves issue of returning back to voice service from multimedia service in circuit domain; prevents instability of network caused by upgrading of 2G network, and limitation of capabilities of users' terminals. The invention is also meets requirement of visual phone.
Description
Technical field
The present invention relates to the field of mobile communication technology, specifically, relate to that the circuit domain multimedia service return back to voice service accomplishing method in the code division multiple access system.
Background technology
The circuit domain multimedia service is H.324M visual telephone service, this business is as a kind of characteristic service that is different from mobile switching center (GSM) network, carry by the non-restricted data information of the circuit domain data of 64k speed (UDI) mode in code division multiple access system, visual telephone service is applied and realizes thereby make H.324M.
Circuit domain multimedia service rollback (fallback) is meant that under certain condition H.324M video telephone return back to the function of normal speech business.Usually under following situation, need the circuit domain multimedia service to return back to speech business:
(1) calling subscriber initiates a video phone call, and the called subscriber does not support video telephone function;
(2) calling subscriber initiates a video phone call, the not signatory circuit domain multimedia service of called subscriber;
(3) calling subscriber initiates a video phone call, and the called subscriber supports video telephone function, but because the called subscriber is in the 2G network at present, the 2G network is not supported video telephone.
At present, the standard of the relevant circuit domain multimedia service of 3GPP rollback is the later core net of R4 based on the core net of flexible exchanging network structure, the call control signalling BICC (Bearer Independent CallControl) of employing and bearer independent between the call control layer Mobile Switching Center Server (MSC Server), professional rollback is realized by BICC signaling coding/decoding negotiation.Simultaneously, need be to supporting that H.324M layer three signaling of the terminal of visual telephone service are carried out the part change, this change is to increase the definition of 04 value to repeating indication parameter (RI, Repeat Indicator), the expression business changes and rollback.Yet some is video terminal or mobile switching centre (MSC) H.324M, and amended RI parameter is not supported in for example early stage H.324M video terminal, can not produce or discern this RI parameter value, and causing H.324M, visual telephone service can not return back to speech business.
Simultaneously, because the calling subscriber generally carries two bearing capacity (BC when initiating the circuit domain multimedia service, Bearer Capability) parameter, and multimedia service and speech business are when carrying out service authentication in Home Location Register (HLR), owing in transmission routing iinformation (the SRI:Send Routing Information) message request of HLR, can only carry a bearing capacity parameter at MSC, according to the normal call flow process in the present standard, can't carry out authentication to two kinds of called business, and realize the rollback of multimedia service to speech business.
On the other hand, the code division multiple access system of setting up mostly adopts the circuit core net such as the R99 network of traditional non-flexible exchanging network structure at present, call signaling between the mobile switching centre (MSC) is ISUP (ISDN User Part) signaling based on the ISDNYong Hubufen signaling in the Signaling System Number 7, rather than based on the BICC signaling; So in the circuit domain core net R4 before, or middle certain core net node can't handle by the call flow in the standard when not supporting the BICC signaling, can not realize that H.324M visual telephone service arrives the rollback of speech business.
Summary of the invention
The object of the present invention is to provide a kind of circuit domain multimedia service to return back to voice service accomplishing method,, realize the circuit domain multimedia service is return back to speech business with in the walking circuit core net.
The present invention is achieved through the following technical solutions:
A kind of circuit domain multimedia service return back to voice service accomplishing method, and this method comprises:
A) callee side receives from after the request of Calling Side multimedia service, carries out service authentication, if callee side is not supported multimedia service, then returns and does not support multimedia service message;
B) Calling Side and callee side are set up voice communication.
Before the steps A further comprise judge whether Calling Side supports multimedia service, if, then initiate the multimedia service request to callee side, execution in step A then, otherwise refusal is initiated the multimedia service request, direct execution in step B.
Described service authentication comprises, callee side is judged whether signatory multimedia service of called subscriber, if judge then whether the current place of called subscriber network supports multimedia service, if judge then whether called user terminal supports multimedia service.
Whether signatory multimedia service comprises the described called subscriber of judgement, Calling Side mobile switching centre sends the routing iinformation request carry the multimedia bearing parameter to the callee side Home Location Register, judges called subscriber's multimedia service of whether contracting by the callee side Home Location Register;
Whether the current place of the described called subscriber of judgement network supports that multimedia service comprises, the callee side Home Location Register sends the roaming number request that carries the multimedia bearing parameter to callee side mobile switching centre, is judged by callee side mobile switching centre whether the network at the current place of called subscriber supports multimedia service;
Describedly judge whether called user terminal supports that multimedia service comprises, callee side mobile switching centre sends the call request of carrying multimedia bearing parameter and voice bearer parameter to the called subscriber, and called user terminal judges whether to support multimedia service.
If the not signatory multimedia service of called subscriber, described returning do not support multimedia service message to comprise, the callee side Home Location Register returns the routing iinformation failure response to Calling Side mobile switching centre.
If the network at the current place of called subscriber is not supported multimedia service, described returning do not support multimedia service message to comprise, callee side mobile switching centre returns the roaming number failure response to the callee side Home Location Register, after the callee side Home Location Register receives the roaming number failure response, return the routing iinformation failure response to Calling Side mobile switching centre.
After the routing iinformation failure response was received by Calling Side mobile switching centre, described step B comprised that further Calling Side mobile switching centre side direction callee side again sends voice service request.
Described step B comprises,
1) Calling Side mobile switching centre resends the routing iinformation request that carries the voice bearer parameter to the callee side Home Location Register, after the callee side Home Location Register receives this routing iinformation request message, send the roaming number request that carries the voice bearer parameter to callee side mobile switching centre, callee side mobile switching centre returns called subscriber's roaming number to the callee side Home Location Register;
2) the callee side Home Location Register returns the routing iinformation response that carries the voice bearer parameter to Calling Side mobile switching centre;
3) Calling Side mobile switching centre sends the initial address message carry the voice bearer parameter to callee side mobile switching centre, after the calling of receiving callee side is confirmed, sends the calling that carries the voice bearer parameter to the calling subscriber and confirms.
If called user terminal is not supported multimedia service, the described called subscriber of steps A carries out further comprising before the service authentication, the callee side Home Location Register sends the roaming number request that carries the multimedia bearing parameter to callee side mobile switching centre, callee side mobile switching centre returns called subscriber's roaming number to the callee side Home Location Register, the callee side Home Location Register returns the routing iinformation response of carrying called subscriber's roaming number and multimedia bearing parameter to the calling mobile exchanging center side, and Calling Side mobile switching centre initiates to carry the ISUP calling start message of multimedia bearing parameter and voice bearer parameter to called mobile switching centre; Described returning do not support multimedia service message to comprise, called user terminal returns the calling of carrying the voice bearer parameter to callee side mobile switching centre and confirms; Described step B comprises, callee side mobile switching centre and Calling Side mobile switching centre carry out the business processing that degrades, and Calling Side mobile switching centre returns the calling of carrying the voice bearer parameter to the calling subscriber and confirms simultaneously.
Described multimedia service request is for after Calling Side mobile switching centre receives call request from the calling subscriber, the routing iinformation request that carries the multimedia bearing parameter that sends to the callee side Home Location Register.
The call request that described calling subscriber initiates carries multimedia bearing parameter and voice bearer parameter, perhaps only carries the multimedia bearing parameter.
The present invention is with respect to prior art, in based on the network of ISUP signaling, realize returning back to speech business from the circuit domain multimedia service, and at mobile network's reality, only need 3G MSC is made the modification of call flow seldom, user terminal, 2G network node there is not the special modification requirement, huge workload and the network instability of avoiding the 2G network upgrade to be brought, and the restriction that ability of user terminal brought satisfy the demand that most operators carry out visual telephone service.Multimedia service effectively increases the flexibility that visual telephone service provides to the realization of the rollback function of speech business, improves user's use experience, helps accurate charging simultaneously.
Description of drawings
Fig. 1 return back to the speech business overall procedure for realizing the circuit domain multimedia service;
When Fig. 2 is the signatory circuit domain multimedia service of called subscriber, return back to the flow process of speech business from the circuit domain multimedia service;
When Fig. 3 does not support multimedia service for the current place of called subscriber network, return back to the flow process of speech business from the circuit domain multimedia service;
Fig. 4 return back to the flow process of speech business for the called subscriber selects when the circuit domain multimedia service return back to speech business voluntarily from the circuit domain multimedia service.
Embodiment
The present invention realizes that the circuit domain multimedia service return back to the speech business overall procedure as shown in Figure 1, judge successively Calling Side whether support multimedia service, called subscriber whether signatory multimedia service, called subscriber whether place network support multimedia service, called user terminal support multimedia service, if do not support that then rollback is to speech business.
In order to make the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, with the signatory circuit multimedia service of called subscriber; The current place of called subscriber network is not supported multimedia service; Called user terminal does not support multimedia service, called subscriber initiatively to select speech business; The calling subscriber is currently located under the second generation network situations such as (2G), and the method that return back to speech business from the circuit domain multimedia service further describes.
One, Calling Side is initiated the circuit domain multimedia service, and the not signatory circuit domain multimedia service of called subscriber in the call establishment, return back to speech business from the circuit domain multimedia service.
Referring to shown in Figure 2, when Fig. 2 is the signatory circuit domain multimedia service of called subscriber, return back to the flow process of speech business from the circuit domain multimedia service, concrete steps are as follows:
(1) two bearing capacity parameters (BC) are carried in calling subscriber's request of making a call in the message, BC1 is the multimedia carrying, and BC2 is a voice bearer;
(2) Calling Side MSC sends the routing iinformation request message to callee side HLR, and wherein bearing parameter is a multimedia;
(3) callee side HLR checks called subscriber's signatory situation, because not signatory multimedia service, callee side HLR returns the routing iinformation failure response to Calling Side MSC, cause value is that bearer service is not supported (Bearer Service Not Provisioned), and perhaps function is not supported (Facility Not Supported);
(4) after Calling Side MSC receives the routing iinformation failure response, send the routing iinformation request message to callee side HLR once more, wherein bearing parameter is voice;
(5) callee side HLR checks called subscriber's signatory situation, if allow speech business, HLR sends the roaming number request message to callee side MSC, and wherein bearing parameter is voice;
(6) callee side MSC sends the roaming number response message to callee side HLR, returns called subscriber's roaming number;
(7) callee side HLR sends the routing iinformation response message to Calling Side MSC, carries called subscriber's roaming number;
(8) after Calling Side MSC receives the callee side roaming number, initiate initial address message, begin normal ISUP interoffice audio call flow process, set up the speech communication between Calling Side and the callee side to callee side MSC.
(9) Calling Side MSC returns the calling acknowledge message to the calling subscriber, and carrying bearing parameter is voice.
Two, the signatory circuit domain multimedia service of called subscriber, but be currently located at the 2G Access Network, network is not supported the circuit domain multimedia service, in the call establishment, return back to speech business from the circuit domain multimedia service.
Referring to shown in Figure 3, Fig. 3 is the current place of called subscriber network when not supporting multimedia service, return back to the flow process of speech business from the circuit domain multimedia service, and concrete steps are as follows:
(1) two bearing capacity parameters are carried in calling subscriber's request of making a call in the message, BC1 is the multimedia carrying, and BC2 is a voice bearer;
(2) MSC sends the routing iinformation request message to callee side HLR, and wherein bearing parameter is the multimedia carrying;
(3) callee side HLR checks called subscriber's signatory situation, because signatory multimedia service, HLR sends the roaming number request message to callee side MSC, and carrying bearing parameter is the multimedia carrying;
(4) callee side MSC checks the bearing parameter in the roaming number request message, judge that the current place of called subscriber network is 2G or 3G Access Network, because MSC is 2G MSC, multimedia bearing parameter in then can not identification message, do not support multimedia service, return failure response to HLR, cause value is that bearer service is not supported (Bearer Service Not Provisioned), and perhaps function is not supported (Facility Not Supported);
(5) callee side HLR returns the routing iinformation failure response to Calling Side MSC, and its cause value is consistent with the cause value in the roaming number failure response message that callee side MSC returns;
(6) after Calling Side MSC receives the routing iinformation failure response, send the routing iinformation request message to callee side HLR once more, wherein bearing parameter is a voice bearer;
(7) callee side HLR checks called subscriber's signatory situation, if allow speech business, HLR sends the roaming number request message to callee side MSC, and wherein bearing parameter is a voice bearer;
(8) callee side MSC sends the roaming number response message to callee side HLR, carries called subscriber's roaming number;
(9) callee side HLR sends the routing iinformation response message to Calling Side MSC, carries called subscriber's roaming number and voice bearer parameter;
(10) after Calling Side MSC receives the callee side roaming number, initiate initial address message, begin normal ISUP interoffice audio call flow process, set up the speech communication between Calling Side and the callee side to callee side MSC.
(11) Calling Side MSC returns the calling acknowledge message to the calling subscriber, and carrying bearing parameter is voice bearer.
Three, the signatory circuit domain multimedia service of called subscriber, network support multimedia service, the manual selective reception speech business of called subscriber; Perhaps called subscriber's circuit domain multimedia service of having contracted, but user terminal is not supported multimedia service, when changing user terminal as the user, in the call establishment, return back to speech business from the circuit domain multimedia service temporarily.
Referring to shown in Figure 4, Fig. 4 does not support multimedia service for called user terminal, perhaps called user terminal is supported multimedia service, but the called subscriber initiatively selects when the circuit domain multimedia service return back to speech business, return back to the flow process of speech business from the circuit domain multimedia service, concrete steps are as follows:
(1) two bearing capacity parameters are carried in calling subscriber's request of making a call in the message, BC1 is the multimedia carrying, and BC2 is a voice bearer;
(2) Calling Side MSC sends the routing iinformation request message to callee side HLR, and wherein bearing parameter is a multimedia;
(3) callee side HLR checks called subscriber's signatory situation, because the signatory multimedia service of user terminal, callee side HLR sends the roaming number request message to callee side MSC, and carrying bearing parameter is the multimedia carrying;
(4) callee side MSC checks the bearing parameter in the roaming number request message, because the network support multimedia service, callee side MSC sends the roaming number response message to callee side HLR, carries called subscriber's roaming number;
(5) callee side HLR sends the routing iinformation response message to Calling Side MSC, carries called subscriber's roaming number and multimedia bearing parameter;
(6) after Calling Side MSC receives the callee side roaming number, initiate initial address message, wherein carry two kinds of bearing parameters, multimedia carrying and voice bearer to callee side MSC;
(7) callee side MSC makes a call to the called subscriber and sets up message, carries two bearing capacity parameters, and BC1 is the multimedia carrying, and BC2 is a voice bearer;
(8) if the called subscriber does not support multimedia service, perhaps the called subscriber supports multimedia service, but this user of called subscriber initiatively selects call out to receive by voice, and at this moment the called subscriber sends to callee side MSC and calls out that to carry bearing parameter in the acknowledge message be voice bearer;
The ISUP signaling process that degrades takes place in (9) callee side MSC, Calling Side MSC and ISUP signaling intermediate node, reduces to voice bearer from the multimedia carrying; In the ISUP signaling, callee side MSC returns the calling of carrying the voice bearer parameter to Calling Side MSC and confirms.
(10) Calling Side MSC returns the calling acknowledge message to the calling subscriber, and carrying bearing parameter is voice.
Four, support the calling subscriber of multimedia service to be currently located at the 2G Access Network, in the call establishment, return back to speech business from the circuit domain multimedia service.
When the calling subscriber is positioned at the request of 2G Access Network initiation multimedia service calling, because the 2G Access Network is not supported multimedia service, end side can be according to access network type, the multimedia call request that the refusing user's terminal is initiated, directly change the multimedia call request into voice call request, send to Calling Side MSC again.Perhaps, the calling subscriber sends the multimedia service calling request to Calling Side MSC, and when Calling Side MSC did the service contracting inspection, the refusal multimedia call was initiatively reduced to audio call.
The above only is preferred embodiment of the present invention, and in order to restriction the present invention, the present invention can not have other implementation yet.For example; the calling subscriber is when making a call request; can only carry the multimedia bearing parameter; perhaps, the BC1 that still carries is the voice bearer parameter, and BC2 is the multimedia bearing parameter; at this moment the method for rollback is identical with above-mentioned steps; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, a kind of circuit domain multimedia service return back to voice service accomplishing method, it is characterized in that, this method comprises:
A) callee side receives from after the request of Calling Side multimedia service, carries out service authentication, if callee side is not supported multimedia service, then returns and does not support multimedia service message;
B) Calling Side and callee side are set up voice communication.
2, further comprise before the implementation method as claimed in claim 1, steps A, judge whether Calling Side supports multimedia service, if then initiate multimedia service request, execution in step A then to callee side, otherwise refusal is initiated the multimedia service request, directly execution in step B.
3, implementation method as claimed in claim 1, it is characterized in that, described service authentication comprises, whether signatory callee side judge called subscriber's multimedia service, if, judge then whether the current place of called subscriber network supports multimedia service, if judge then whether the called subscriber supports multimedia service.
4, implementation method as claimed in claim 3 is characterized in that,
Whether signatory multimedia service comprises the described called subscriber of judgement, Calling Side mobile switching centre sends the routing iinformation request carry the multimedia bearing parameter to the callee side Home Location Register, judges called subscriber's multimedia service of whether contracting by the callee side Home Location Register;
Whether the current place of the described called subscriber of judgement network supports that multimedia service comprises, the callee side Home Location Register sends the roaming number request that carries the multimedia bearing parameter to callee side mobile switching centre, is judged by callee side mobile switching centre whether the network at the current place of called subscriber supports multimedia service;
Whether the described called subscriber of judgement supports that multimedia service comprises, callee side mobile switching centre sends the call request of carrying multimedia bearing parameter and voice bearer parameter to the called subscriber, and called user terminal judges whether to support multimedia service.
5, implementation method as claimed in claim 3, it is characterized in that, if the not signatory multimedia service of called subscriber, described returning do not support multimedia service message to comprise, the callee side Home Location Register returns the routing iinformation failure response to Calling Side mobile switching centre.
6, implementation method as claimed in claim 3, it is characterized in that, if the network at the current place of called subscriber is not supported multimedia service, described returning do not support multimedia service message to comprise, callee side mobile switching centre returns the roaming number failure response to the callee side Home Location Register, after the callee side Home Location Register receives the roaming number failure response, return the routing iinformation failure response to Calling Side mobile switching centre.
As claim 5 or 6 described implementation methods, it is characterized in that 7, after the routing iinformation failure response was received by Calling Side mobile switching centre, described step B comprised that further Calling Side mobile switching centre side direction callee side again sends voice service request.
8, implementation method as claimed in claim 7 is characterized in that, described step B comprises,
1) Calling Side mobile switching centre resends the routing iinformation request that carries the voice bearer parameter to the callee side Home Location Register, after the callee side Home Location Register receives this routing iinformation request message, send the roaming number request that carries the voice bearer parameter to callee side mobile switching centre, callee side mobile switching centre returns called subscriber's roaming number to the callee side Home Location Register;
2) the callee side Home Location Register returns the routing iinformation response that carries the voice bearer parameter to Calling Side mobile switching centre;
3) Calling Side mobile switching centre sends the initial address message carry the voice bearer parameter to callee side mobile switching centre, after the calling of receiving callee side is confirmed, sends the calling that carries the voice bearer parameter to the calling subscriber and confirms.
9, implementation method as claimed in claim 3 is characterized in that, if called user terminal is not supported multimedia service,
The described called subscriber of steps A carries out further comprising before the service authentication, the callee side Home Location Register sends the roaming number request that carries the multimedia bearing parameter to callee side mobile switching centre, callee side mobile switching centre returns called subscriber's roaming number to the callee side Home Location Register, the callee side Home Location Register returns the routing iinformation response of carrying called subscriber's roaming number and multimedia bearing parameter to Calling Side mobile switching centre side, and Calling Side mobile switching centre initiates to carry the ISUP calling start message of multimedia bearing parameter and voice bearer parameter to callee side mobile switching centre;
Described returning do not support multimedia service message to comprise, the called subscriber returns the calling of carrying the voice bearer parameter to callee side mobile switching centre and confirms;
Described step B comprises, callee side mobile switching centre and Calling Side mobile switching centre carry out the business processing that degrades, and Calling Side mobile switching centre returns the calling of carrying the voice bearer parameter to the calling subscriber and confirms simultaneously.
10, implementation method as claimed in claim 1, it is characterized in that, described multimedia service request is for after Calling Side mobile switching centre receives call request from the calling subscriber, the routing iinformation request that carries the multimedia bearing parameter that sends to the callee side Home Location Register.
11, implementation method as claimed in claim 10 is characterized in that, the call request that described calling subscriber initiates carries multimedia bearing parameter and voice bearer parameter, perhaps only carries the multimedia bearing parameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031497454A CN100337486C (en) | 2003-08-04 | 2003-08-04 | Method for realizing circuit domain multimedia business backspace to voice business |
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| CNB031497454A CN100337486C (en) | 2003-08-04 | 2003-08-04 | Method for realizing circuit domain multimedia business backspace to voice business |
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| CN1581997A true CN1581997A (en) | 2005-02-16 |
| CN100337486C CN100337486C (en) | 2007-09-12 |
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| CNB031497454A Expired - Fee Related CN100337486C (en) | 2003-08-04 | 2003-08-04 | Method for realizing circuit domain multimedia business backspace to voice business |
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Cited By (14)
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| WO2006131043A1 (en) * | 2005-06-10 | 2006-12-14 | China Mobile Communications Corporation | Method for processing video telephone call in mobile communication network |
| WO2007056936A1 (en) * | 2005-11-18 | 2007-05-24 | Huawei Technologies Co., Ltd. | Method and network equipment for multimedia backspacing in communication network and communication network thereof |
| WO2008022536A1 (en) * | 2006-08-17 | 2008-02-28 | Huawei Technologies Co., Ltd. | A method, a system and a service control point for providing circuit domain service |
| CN100411437C (en) * | 2005-06-10 | 2008-08-13 | 中国移动通信集团公司 | Method for processing videophone calling failure based on mobile communication network |
| CN100411449C (en) * | 2005-06-10 | 2008-08-13 | 中国移动通信集团公司 | Prompting method when mobile terminal can't use videophone |
| CN100417288C (en) * | 2005-03-17 | 2008-09-03 | 华为技术有限公司 | Method of turning multimedia call back to speech call |
| CN100429955C (en) * | 2005-06-10 | 2008-10-29 | 中国移动通信集团公司 | Handling method for limiting videophone service in cell |
| CN100454915C (en) * | 2006-07-17 | 2009-01-21 | 华为技术有限公司 | System, method and information processing device for realizing multimedia service change |
| CN100454949C (en) * | 2005-08-23 | 2009-01-21 | 中国移动通信集团公司 | Method for obtaining mobile terminal professional ability information |
| CN100493214C (en) * | 2007-02-02 | 2009-05-27 | 华为技术有限公司 | Method and apparatus for implementing call failure forwarding |
| WO2009111991A1 (en) * | 2008-03-14 | 2009-09-17 | 华为技术有限公司 | A method and a device for realizing the interworking between the ims domain and the cs domain |
| CN101600190B (en) * | 2008-06-03 | 2011-04-13 | 大唐移动通信设备有限公司 | Method and device for activating return circuit domain function of user terminal |
| CN102137363A (en) * | 2010-12-22 | 2011-07-27 | 华为技术有限公司 | Calling processing method and device |
| CN101742694B (en) * | 2008-11-25 | 2014-04-16 | 大唐移动通信设备有限公司 | Video telephone business processing method, system and device |
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| US6608832B2 (en) * | 1997-09-25 | 2003-08-19 | Telefonaktiebolaget Lm Ericsson | Common access between a mobile communications network and an external network with selectable packet-switched and circuit-switched and circuit-switched services |
| JP3796408B2 (en) * | 1999-05-12 | 2006-07-12 | ノキア コーポレイション | Method and system for establishing a connection |
| EP1273187A1 (en) * | 2000-04-03 | 2003-01-08 | Nokia Corporation | Dual fallback in circuit-switched multimedia call setup |
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| CN100417288C (en) * | 2005-03-17 | 2008-09-03 | 华为技术有限公司 | Method of turning multimedia call back to speech call |
| US8154579B2 (en) | 2005-06-10 | 2012-04-10 | China Mobile Communications Corporation | Method for processing the video telephone calling based on the mobile communication network |
| CN100397892C (en) * | 2005-06-10 | 2008-06-25 | 中国移动通信集团公司 | Method for processing videophone calling based on mobile communication network |
| CN100411437C (en) * | 2005-06-10 | 2008-08-13 | 中国移动通信集团公司 | Method for processing videophone calling failure based on mobile communication network |
| CN100411449C (en) * | 2005-06-10 | 2008-08-13 | 中国移动通信集团公司 | Prompting method when mobile terminal can't use videophone |
| CN100429955C (en) * | 2005-06-10 | 2008-10-29 | 中国移动通信集团公司 | Handling method for limiting videophone service in cell |
| WO2006131043A1 (en) * | 2005-06-10 | 2006-12-14 | China Mobile Communications Corporation | Method for processing video telephone call in mobile communication network |
| CN100454949C (en) * | 2005-08-23 | 2009-01-21 | 中国移动通信集团公司 | Method for obtaining mobile terminal professional ability information |
| WO2007056936A1 (en) * | 2005-11-18 | 2007-05-24 | Huawei Technologies Co., Ltd. | Method and network equipment for multimedia backspacing in communication network and communication network thereof |
| CN100454915C (en) * | 2006-07-17 | 2009-01-21 | 华为技术有限公司 | System, method and information processing device for realizing multimedia service change |
| WO2008022536A1 (en) * | 2006-08-17 | 2008-02-28 | Huawei Technologies Co., Ltd. | A method, a system and a service control point for providing circuit domain service |
| CN100493214C (en) * | 2007-02-02 | 2009-05-27 | 华为技术有限公司 | Method and apparatus for implementing call failure forwarding |
| WO2009111991A1 (en) * | 2008-03-14 | 2009-09-17 | 华为技术有限公司 | A method and a device for realizing the interworking between the ims domain and the cs domain |
| CN101600190B (en) * | 2008-06-03 | 2011-04-13 | 大唐移动通信设备有限公司 | Method and device for activating return circuit domain function of user terminal |
| CN101742694B (en) * | 2008-11-25 | 2014-04-16 | 大唐移动通信设备有限公司 | Video telephone business processing method, system and device |
| CN102137363A (en) * | 2010-12-22 | 2011-07-27 | 华为技术有限公司 | Calling processing method and device |
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