CN100493214C - Method and apparatus for implementing call failure forwarding - Google Patents
Method and apparatus for implementing call failure forwarding Download PDFInfo
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- CN100493214C CN100493214C CNB2007100030609A CN200710003060A CN100493214C CN 100493214 C CN100493214 C CN 100493214C CN B2007100030609 A CNB2007100030609 A CN B2007100030609A CN 200710003060 A CN200710003060 A CN 200710003060A CN 100493214 C CN100493214 C CN 100493214C
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Abstract
The invention discloses one method and device to realize call failure switch, which through failure front switch business register realizes user terminal call in circuit area and IMS area conversion by IMS area and circuit area common label; user terminal fails in any area and then transfers to other area for call and the user can take part in two area connections to improve user terminal call success to facilitate different areas terminal communication to get circuit area user terminal to share each gain business service.
Description
Technical field
The present invention relates to the communications field, especially refer to a kind of method and device of realizing call failure forwarding.
Background technology
Present mobile network is based on the system of circuit domain mostly, user terminal realizes that function ratio is more single, general support voice and simple data service, and IMS (IP Multimedia Subsystem, IP Multimedia System) as Next Generation Telecommunication Networks network architectural framework, with its unified certification that provides, charge, open business provides system, easily with IT (Information Technology, information technology) system integration ability more and more obtains the support of telecom equipment manufacturers, telecom operators.And by the IMS system, the multi-media value-added business that can provide circuit domain to provide to 3G (3rd Generation, 3G (Third Generation) Moblie technology) media user terminal, for example: present business, video conference etc.According to present development trend, meeting of IMS territory and traditional circuit domain have long co-existence periods, and this just need set up the intercommunication of IMS territory and circuit domain.But existing circuit-domain network can not be supported the IMS network with the user terminal of serving the available circuit territory, the circuit domain user terminal can't be enjoyed the services such as some multi-media value-added business that the IMS system provides, and makes that the communication between IMS territory and the circuit domain implements also cumbersome.
Chinese patent application (application number: 200610065232.9; The applying date: on March 20th, 2006; Denomination of invention: the method for connecting multimedia subsystem of circuit field terminal and implement device thereof) method of a kind of connecting multimedia subsystem of circuit field terminal of proposition, MSC (Mobile Switching Center, mobile switching centre) Simulation with I MS initiates SIP (Session Initiation Protocol, Session initiation Protocol) signaling is with connecting multimedia subsystem of circuit field terminal IMS territory; This invention also proposes a kind of method of seeking called circuit domain terminal by IP multimedia subsystem, IMS, after in IP multimedia subsystem, IMS, carrying out the called class supplementary service and value-added service of registration, with the MSC of Call Forwarding under the terminal called, affiliated MSC receives the INVITE signaling from the IMS territory, resolving called circuit domain terminal number, switching called terminal.The method of circuit domain connecting multimedia subsystem is by the SIP signaling circuit domain user to be linked into IP multimedia subsystem, IMS in this invention, enjoys every value-added service of IP multimedia subsystem, IMS; And seek the method for called circuit domain terminal by IP multimedia subsystem, IMS, then be the INVITE signaling from the IMS territory to be resolved, thereby obtain the circuit domain terminal number by MSC.This inventive circuit territory terminal can not be registered in the IMS territory, can only in bid, be routed to the IMS territory, the IMS territory just is merely able to ordinary call class business is controlled, and can not provide as presenting more IMS business such as business (Presence), click-to-dial, networking telephone book circuit domain terminal.
In addition, development along with terminal technology, GSM (Global System for MobileCommunications, global system for mobile communications) and the bluetooth bimodulus, GSM and WiFi (WirelessFidelity, Wireless Fidelity) bimodulus, GSM and WiMAX (Worldwide Interoperability forMicrowave Access, micro-wave access global inter communication) bimodulus, 3G and WiMAX bimodulus, 3G and WiFi bimodulus etc. begin to occur, and can be popular gradually, it is exactly generally to use circuit domain voice service that operator provides and at WiFi that these bimodulus have a common feature, the packet domain service is used in overlay area such as bluetooth or WiMAX.Therefore, the user terminal of circuit domain or packet domain can't keep original user ID and use dual-mode terminal, and the IMS territory is as the IP multimedia subsystem, IMS in the packet domain, seem cumbersome with communicating by letter of circuit domain, and the circuit domain user terminal also can't be enjoyed the services such as some multi-media value-added business in IMS territory.
A kind of circuit domain and IMS territory intercommunication mode framework schematic diagram are as shown in Figure 1 in the prior art, circuit domain core net and IMS domain core net independently are provided with, middle by MGCF (Media Gateway ControlFunction, the MGCF entity) and MGW (Media Gateway, media gateway) carry out intercommunication.The calling that conventional terminal takes place in circuit domain will be at first be routed to MGCF by circuit domain instruction (as ISUP etc.), is to issue the IMS territory after the SIP signaling by MGCF with Call Transfer, is undertaken by the IMS territory that business controlled again and charging etc.After the IMS territory disposed, the signaling after will handling was again transmitted back circuit domain via MGCF and is continued.MSC is the control core of traditional circuit domain among Fig. 1, MSC is on the one hand by A interface signaling and RAN (Radio Access Network, wireless access network) connects control MS (MobileStation, travelling carriage), on the one hand by MAP (Mobile Application Part, MAP) signaling and HLR (Home Location Register, attaching position register) connection is carried out data management and location management to the user.The intercommunication in circuit domain and IMS territory is to finish by MGCF, MGCF one side and MSC are by ISUP (ISDN User Part, ISDNYong Hubufen) signaling is carried out intercommunication, one side and CSCF (Call Session Control Function, call conversation control function entity) carry out intercommunication by the SIP signaling, MGCF plays the translation function of ISUP and SIP signaling therein.Though this intercommunication mode can realize continuing of circuit domain and the calling of IMS territory user terminal, but, because existing circuit-domain network can not be supported the IMS network with the user terminal of serving the available circuit territory, the circuit domain user terminal does not possess the authority of using the value-added service service of IMS territory, just can't enjoy the services such as some multi-media value-added business that the IMS system provides yet.
Summary of the invention
The problem that embodiments of the invention will solve is not do under the situation of any change at network and portable terminal, realize that the user terminal calling continues between circuit domain and IMS territory, and make the circuit domain user terminal can more enjoy the services such as various value-added services in IMS territory.
For achieving the above object, the embodiment of the invention provides a kind of method that realizes call failure forwarding, may further comprise the steps:
With internet protocol multimedia subsystem IMS territory identical user ID is set in circuit domain;
When calling out, whether the call path that detects user terminal can reach;
As if unreachable in the territory of call path in described circuit domain and described IMS territory that detects described user terminal, then forward in the another one territory and call out.
The embodiment of the invention also provides a kind of device of realizing call failure forwarding, comprising: service log-on unit, data storage cell, call state query unit and territory converting unit,
Described service log-on unit is used for registration call failure forward-shifting service, and with the IMS territory identical user ID is set in circuit domain;
Described data storage cell connects described service log-on unit, is used to store user totem information;
Described call state query unit connects described data storage cell, and whether the call state that is used for the inquiring user terminal is to reach;
Described territory converting unit connects described call state query unit, be used for when the call path of user terminal therein in territory when unreachable, with described Call Transfer to the another one territory.
Embodiments of the invention are being done under the situation of any change without network and portable terminal, realizing with circuit domain and IMS territory common user label manner that user terminal is called out changes between circuit domain and IMS territory, and the user can participate in indication and continue in two territories, improved the user terminal calling ratio of success, make things convenient for the communication between circuit domain and the IMS territory, and made the circuit domain user terminal can more enjoy the services such as various value-added services in IMS territory.
Description of drawings
Fig. 1 is a kind of circuit domain and an IMS territory intercommunication mode framework schematic diagram in the prior art;
Fig. 2 realizes the schematic diagram of call circuit territory and IMS territory failure forward shifting method for the embodiment of the invention;
Fig. 3 is the schematic diagram of realizing in the embodiment of the invention one calling out at circuit domain and IMS territory failure forward shifting method;
Fig. 4 is the schematic diagram of realizing in the embodiment of the invention two calling out at circuit domain and IMS territory failure forward shifting method;
Fig. 5 realizes the structural representation of call failure forwarding device for the embodiment of the invention.
Embodiment
Embodiments of the invention are the network architectures based on prior art, by the failure forward-shifting service of user terminal registration call, realize user terminal calling continuing between circuit domain path and path, IMS territory.
The embodiment of the invention realizes calling out the schematic diagram at circuit domain and IMS territory failure forward shifting method, as shown in Figure 2, user terminal A, user terminal B and user terminal C have registered the failure forward-shifting service respectively, and user terminal A is the circuit domain user terminal, and user terminal B is an IMS territory user terminal.Single arrow is represented the failure forwarded leg of IMS intra domain user terminal B caller party terminal C among the figure, the failure forwarded leg of double-head arrow indication circuit intra domain user terminal A caller party terminal C.
Wherein, user terminal A is the circuit domain user terminal, then user terminal A is the call path of circuit domain to the call preference path of user terminal C, when the call path that detects circuit domain when the moving exchanging center MSC of circuit domain can reach, and the direct path caller party terminal C by circuit domain then; The call path that detects circuit domain when the circuit domain moving exchanging center MSC is unreachable, then forwards the business in IMS territory before the failure by registration before to, and user terminal A is transferred to the IMS territory to the call path of user terminal C from circuit domain;
User terminal B is an IMS territory user terminal, then user terminal B is the call path in IMS territory to the call preference path of user terminal C, as the query call State Control function I-CSCF in IMS territory (Interogating-Call Session Control Function, when the query call conversation control function entity) call path that detects the IMS territory can reach, then directly from the path caller party terminal C in IMS territory; The call path that detects the IMS territory as the query call State Control function I-CSCF in IMS territory is unreachable, then forwards the business of circuit domain before the failure by registration before to, and user terminal B is transferred to circuit domain to the call path of user terminal C from the IMS territory.
In the present embodiment, the circuit domain call failure then before forwards the IMS territory to and calls out, and IMS territory call failure then before forwards circuit domain call to, and the success rate of user's terminal call is improved.
Wherein, the detailed process that the call path of user terminal is transferred to the IMS territory from circuit domain may further comprise the steps as shown in Figure 3:
Step S301, circuit domain call subscriber terminal A is to the make a call request of called user terminal C of moving exchanging center MSC; When circuit domain call subscriber terminal A will call out called user terminal C, user terminal A can send the request of caller party terminal C to the moving exchanging center MSC of circuit domain, after the moving exchanging center MSC of circuit domain receives call request, enter the operation of step S302.
Step S302, whether the call path in moving exchanging center MSC testing circuit territory can reach; Specifically comprise:
Step S3021, moving exchanging center MSC inquire about the state of called user terminal C to the attaching position register HLR at called user terminal C place transmit status inquiry request message;
Step S3022, attaching position register HLR is to the call status information of moving exchanging center MSC feedback called user terminal C;
Step S3023, whether moving exchanging center MSC can reach according to the call path in the call status information decision circuitry territory of called user terminal C.
Step S303 can reach if moving exchanging center MSC detects the call path of circuit domain, then directly calls out called user terminal C from the call path of circuit domain.
Step S304, unreachable if moving exchanging center MSC detects the call path of circuit domain, moving exchanging center MSC is indicated to the sign of the called user terminal C of call failure the MGCF entity MGCF in IMS territory.
Step S305, MGCF entity MGCF sends call request to service call State Control functional entity S-CSCF.
Step S306, service call State Control functional entity S-CSCF (Serving-Call SessionControl Function, service call session control function entity) control media gateway is called out the IMS territory user ID of called user terminal C.
The call path of user terminal is transferred to circuit domain from the IMS territory detailed process may further comprise the steps as shown in Figure 4:
Step S401, IMS territory call subscriber terminal B is to the make a call request of called user terminal C of CSCF entity CSCF.
Step S402, whether the call path that query call State Control functional entity I-CSCF detects the IMS territory can reach; Specifically comprise:
Step S4021, query call State Control functional entity I-CSCF inquire about the state of called user terminal C to the attaching position register HLR at called user terminal C place transmit status inquiry request message;
Step S4022, attaching position register HLR is to the call status information of query call State Control functional entity I-CSCF feedback called user terminal C;
Step S4023, query call State Control functional entity I-CSCF judges according to the call status information of user terminal C whether the call path in IMS territory can reach.
Step S403 can reach if query call State Control functional entity I-CSCF detects the call path in IMS territory, then directly calls out called user terminal C from the IMS territory.
Step S404, if it is unreachable that query call State Control functional entity I-CSCF detects the call path in IMS territory, service call State Control functional entity S-CSCF is indicated to MGCF entity MGCF with the sign of the called user terminal C of call failure.
Step S405, MGCF entity MGCF send the request of calling out called user terminal C to moving exchanging center MSC.
Step S406, moving exchanging center MSC is called out the circuit domain user sign of called user terminal C.
The embodiment of the invention realizes calling out the structural representation of rotary device before circuit domain and the failure of IMS territory, as shown in Figure 5, comprising: service log-on unit 100, data storage cell 200, call state query unit 300 and territory converting unit 400.
Wherein, service log-on unit 100 is used for registration call failure forward-shifting service, with the IMS territory identical user ID is set in circuit domain, and log-on message is sent to data storage cell 200, is stored by data storage cell 200;
Call state query unit 300 connects data storage cell 200, and when being used to call out, according to the user terminal information in the data storage cell 200, whether the call state of inquiring user terminal is to reach;
Embodiments of the invention are being done under the situation of any change without network and portable terminal, by the registration failure forward-shifting service, realizing with circuit domain and IMS territory common user label manner that user terminal is called out changes between circuit domain and IMS territory, and the user can participate in indication and continue in two territories, improved the user terminal calling ratio of success, make things convenient for the communication between circuit domain and the IMS territory, and made the circuit domain user terminal can more enjoy the services such as various value-added services in IMS territory.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1, a kind of method that realizes call failure forwarding is characterized in that, may further comprise the steps:
With internet protocol multimedia subsystem IMS territory identical user ID is set in circuit domain;
When calling out, whether the call path that detects user terminal can reach;
As if unreachable in the territory of call path in described circuit domain and described IMS territory that detects described user terminal, then forward in the another one territory and call out.
2, realize the method for call failure forwarding according to claim 1, it is characterized in that, describedly then forward in the another one territory and call out, specifically comprise if detect in the territory of call path in described circuit domain and described IMS territory of described user terminal unreachablely:
If it is unreachable to the call path of called user terminal that the moving exchanging center MSC of described circuit domain detects circuit domain, the IMS territory user ID that then before forwards called user terminal to is called out;
If it is unreachable to the call path of called user terminal that the CSCF entity CSCF in described IMS territory detects the IMS territory, the circuit domain user sign that then before forwards called user terminal to is called out.
3, as the method for realization call failure forwarding as described in the claim 2, it is characterized in that, it is unreachable to the call path of called user terminal that the moving exchanging center MSC of described circuit domain detects circuit domain, the IMS territory user ID that then before forwards called user terminal to is called out, and specifically may further comprise the steps:
Described circuit domain call subscriber terminal is to the make a call request of described called user terminal of moving exchanging center MSC;
Whether the call path that described moving exchanging center MSC detects described circuit domain can reach;
If it is unreachable that described moving exchanging center MSC detects the call path of described circuit domain, described moving exchanging center MSC is indicated to the CSI called subscriber identification of described call failure the MGCF entity MGCF in described IMS territory;
Described MGCF entity MGCF sends call request to service call State Control functional entity S-CSCF;
Described service call State Control functional entity S-CSCF control media gateway is called out the IMS territory user ID of described called user terminal.
4, as the method for realization call failure forwarding as described in the claim 3, it is characterized in that whether the call path in described moving exchanging center MSC testing circuit territory can reach, and specifically comprises:
Described moving exchanging center MSC is inquired about described called user terminal state to the attaching position register HLR at described called user terminal place transmit status inquiry request message;
Described attaching position register HLR feeds back the call status information of described called user terminal to described moving exchanging center MSC;
Described moving exchanging center MSC judges according to the call status information of described called user terminal whether the call path of described circuit domain can reach.
5, as the method for realization call failure forwarding as described in the claim 2, it is characterized in that, it is unreachable to the call path of called user terminal that the CSCF entity CSCF in described IMS territory detects the IMS territory, the circuit domain user sign that then before forwards described called user terminal to is called out, and specifically may further comprise the steps:
Described IMS territory call subscriber terminal is to the make a call request of described called user terminal of CSCF entity CSCF;
Whether the call path that query call State Control functional entity I-CSCF detects described IMS territory can reach;
If the call path that described query call State Control functional entity I-CSCF detects described IMS territory is unreachable, service call State Control functional entity S-CSCF is indicated to MGCF entity MGCF with the CSI called subscriber identification of described call failure;
Described MGCF entity MGCF sends call request to described moving exchanging center MSC;
Described moving exchanging center MSC is called out the circuit domain user sign of described called user terminal.
As the method for realization call failure forwarding as described in the claim 5, it is characterized in that 6, whether the call path that described query call State Control functional entity I-CSCF detects the IMS territory can reach, and specifically comprises:
Described query call State Control functional entity I-CSCF inquires about described called user terminal state to the attaching position register HLR at described called user terminal place transmit status inquiry request message;
Described attaching position register HLR feeds back the call status information of described called user terminal to described query call State Control functional entity I-CSCF;
Described query call State Control functional entity I-CSCF judges according to the call status information of described called user terminal whether the call path in described IMS territory can reach.
7, a kind of device of realizing call failure forwarding is characterized in that, comprising: service log-on unit, data storage cell, call state query unit and territory converting unit,
Described service log-on unit is used for registration call failure forward-shifting service, and with the IMS territory identical user ID is set in circuit domain;
Described data storage cell connects described service log-on unit, is used to store user totem information;
Described call state query unit connects described data storage cell, and whether the call state that is used for the inquiring user terminal can reach;
Described territory converting unit connects described call state query unit, be used for when the call path of user terminal therein in territory when unreachable, with described Call Transfer to the another one territory.
8, as the device of realization call failure forwarding as described in the claim 7, it is characterized in that described data storage cell also is used for storage terminal service log-on information, rights of using and authorization data information.
As the device of realization call failure forwarding as described in the claim 7, it is characterized in that 9, the calling of described territory converting unit control user terminal is changed between circuit domain and IMS territory, is to realize by the control media gateway.
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| CNB2007100030609A CN100493214C (en) | 2007-02-02 | 2007-02-02 | Method and apparatus for implementing call failure forwarding |
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| CNB2007100030609A CN100493214C (en) | 2007-02-02 | 2007-02-02 | Method and apparatus for implementing call failure forwarding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102469427B (en) * | 2010-11-15 | 2014-08-06 | 中国移动通信集团公司 | Method, system and device for realizing one-number service |
| CN103873272B (en) * | 2012-12-07 | 2017-06-20 | 中国移动通信集团北京有限公司 | The method and device of CSCF network element failures treatment in a kind of IMS network |
| WO2015169211A1 (en) * | 2014-05-05 | 2015-11-12 | Mediatek Inc. | Method and apparatus for handling a call conflict in a communications network |
| CN106888444A (en) * | 2015-12-15 | 2017-06-23 | 中国电信股份有限公司 | Realize that the voice roaming user based on LTE does called method and operation system |
| CN106937264B (en) * | 2015-12-29 | 2020-06-02 | 中国电信股份有限公司 | VoLTE user call addressing method, system and HSS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1581997A (en) * | 2003-08-04 | 2005-02-16 | 华为技术有限公司 | Method for realizing circuit domain multimedia business backspace to voice business |
| CN1852269A (en) * | 2005-06-18 | 2006-10-25 | 华为技术有限公司 | Method for realizing two-directional interacting of circuit zone and grouping zone, and system therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1581997A (en) * | 2003-08-04 | 2005-02-16 | 华为技术有限公司 | Method for realizing circuit domain multimedia business backspace to voice business |
| CN1852269A (en) * | 2005-06-18 | 2006-10-25 | 华为技术有限公司 | Method for realizing two-directional interacting of circuit zone and grouping zone, and system therefor |
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