CN101742693B - IMS core network system supporting network selection of different field general terminal and calling method - Google Patents
IMS core network system supporting network selection of different field general terminal and calling method Download PDFInfo
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- CN101742693B CN101742693B CN2008102264988A CN200810226498A CN101742693B CN 101742693 B CN101742693 B CN 101742693B CN 2008102264988 A CN2008102264988 A CN 2008102264988A CN 200810226498 A CN200810226498 A CN 200810226498A CN 101742693 B CN101742693 B CN 101742693B
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Abstract
The invention discloses an IMS core network system supporting network selection of a different field general terminal. The IMS core network system comprises a CS field core network, an IMS field core network connected with a CS field by MGCF and a different field general terminal; and an ENUM module of an IMS field is interacted with HSS and HLR respectively and used for acquiring the registration status information and the network selection strategy information of the different field general terminal, and determining whether to return an SIP URI number according to the registration status information and the network selection strategy information. The invention also discloses a corresponding method for calling the different field general terminal. By the system and the method disclosed by the invention, the network can be selected according to the registration status of a user, and a success ratio of the network selection is improved; and the repeated status change of the user is avoided, and the requirement on the system performance is lowered.
Description
Technical field
The present invention relates to a kind of IMS core network system and method for calling of supporting network selection of different field general terminal; Particularly a kind of through transforming existing IP Multimedia System (IP Multimedia Subsystem; Be called for short IMS); Be implemented in the IMS territory and carry out network selection, belong to the mobile communication technology field according to user registration state.
Background technology
The tradition core network system is the CS territory, and basic services such as voice, video telephone and short message end to end mainly are provided.Along with the moving communicating field intensification of competition; Operator need attract the user through new differentiated service; And in core network, introduced packet switching (Packet Switch for this reason; Be called for short PS) territory, through the IP transmission new data service, for example MMS (Multimedia Message Service) (MultimediaMessaging Service are provided; Be called for short MMS), content-browsing etc., but the application that these IP-based data services are not succeeded because of factor such as the network bandwidth, terminal limitations, poor user experience, noncommittal charging.
In order to overcome the problems referred to above; Third generation partner program (3rd Generation PartnershipProject; Abbreviation 3GPP) proposition IMS core net in Release 5 versions is superimposed on the PS territory and the carrying and the transmission of multi-media signal are carried out in Using P S territory.The soft-switch platform that call/session is controlled has been set up in the introducing of IMS, realizes real-time, communication service end to end through technology such as session negotiation and management, QoS management, mobile management; IMS also provides for operator: the teleservice of non real-time property, for example chat (Chat), instant message (Instant Message is called for short IM) business; Multiparty service, for example multimedia conferencing (Multimedia Conferencing), chatroom (ChatRooms) professional, Push-to-talk over Cellular (Push to talk over Cellular is called for short POC); And some servers for example dynamically push professional (Dynamic Push Services), click to dial (Click to Dial) etc. to user's business.We can say that IMS is the core network technology that really can promote user experience, improve operator's income.
In the prior art; The network architecture between core net CS territory and the IMS territory is as shown in Figure 1; When call out the terminal that is in the IMS territory at the terminal that is in the CS territory, by HLR identification and instruction mobile switching centre (mobile switching centre is called for short MSC); Transfer the call to MGCF (Media Gateway Control Function; Be called for short MGCF)/WMG (Media Gateway is called for short MGW) unit, realize further in the IMS territory; By service-call session control function (Service-Call Session Control Function; Abbreviation S-CSCF) module, realization termination number are handled to ENUM (Electronic Numbering the is called for short Enum) module and the home subscriber server (Home Subscriber Server is called for short HSS) of the mapping of general being located by connecting (URL); And the terminal that is in the IMS territory then by HSS identification and instruction S-CSCF module, transfers the call to the MGCF unit when calling out, and further is implemented in the call treatment in the CS territory by MSC.For IMS terminal and CS terminal situation independent of each other, above-mentioned network can satisfy the demand of accurate calling.
But continuous progress along with terminal technology; Having occurred can compatible CS, GPRS and the IMS territory is professional and compatible 3 generation CS, GPRS and IMS territory are professional terminal; Above-mentioned terminal can be supported in the different business in CS territory, PS territory and the IMS territory; Adopt unified E.164 number, can abbreviate general purpose terminal as.Though general purpose terminal carries out business autonomous network selection when initiating, when general purpose terminal during as receiving terminal, the existing network architecture just can't be judged through any core net provides the support to business.
In order to tackle above-mentioned problem that can't network selection, a kind of simple technical scheme is that calling terminal in which core net makes a call, and just through this core net business support is provided; Another kind of simple technical scheme is to select core net that the support to business is provided immediately by system.But because general purpose terminal is not necessarily registered in different core net simultaneously, therefore above-mentioned dual mode all possibly cause selecteed core net can't find called general purpose terminal, therefore causes the failure of call business perhaps to postpone.
Also having a kind of technical scheme is general purpose terminal through constantly in various core network domain, registering switching, in the territory state of only guaranteeing at a time effectively realize core net accurately, instant network selection.But this technical scheme needs network constantly state of user to be switched and configuration status information repeatedly, has caused the reduction of efficient and to the raising of performance index requirements; Simultaneously, also can't bring into play the advantage that general purpose terminal can support simultaneously that foreign lands are professional.
Summary of the invention
The objective of the invention is in order to overcome the defective of above-mentioned prior art, a kind of IMS core network system and method for calling of supporting network selection of different field general terminal is provided,, be implemented in the IMS network network selection call business through user registration state.
For realizing above-mentioned purpose; The invention provides a kind of IMS core network system of supporting network selection of different field general terminal; Comprise the CS domain core net, with IMS domain core net and different field general terminal that the CS territory is connected through MGCF/MGW, the HSS in said IMS territory is used to preserve the registration status information at network selection policy information and terminal, IMS territory;
The HLR in said CS territory is used to preserve the registration status information at terminal, CS territory;
The ENUM module in said IMS territory is mutual with said HSS and HLR respectively, is used to obtain the registration status information and the network selection policy information of said different field general terminal, and determines whether to return SIP URI number according to registration status information and network selection policy information.
Wherein, said ENUM is specially with HSS with HLR respectively alternately: said ENUM communicates by letter with HSS with HLR respectively and is connected.Said ENUM communicates by letter with said HLR through the MAP interface and is connected.
Perhaps, said HLR and said HSS close and establish; Said ENUM is specially said ENUM alternately and closes the HLR that establishes and communicate by letter with HSS and be connected with HLR and HSS respectively.
Perhaps, communication is connected said HLR with HSS, and said HLR upgrades the registration status information at terminal, CS territory to said HSS; Said ENUM is specially said ENUM alternately with HLR and HSS respectively and communicates by letter with HSS and be connected.
Said MGCF/MGW communicates by letter with MSC and SMS/MMS respectively and is connected, and is used to distinguish real time business and non-real-time service, and sends real time business and give said MSC, sends said non-real-time service and gives said SMS/MMS.
Based on the IMS core network system of above-mentioned support network selection of different field general terminal, the present invention also provides a kind of method of calling of different field general terminal, when terminal, IMS territory when different field general terminal makes a call business, may further comprise the steps:
The S-CSCF in step 1, said IMS territory is to ENUM request analysis called number;
Step 3, said ENUM inquire about the whether registration in the CS territory of said different field general terminal, are execution in step 4 then, otherwise execution in step 7;
Preset network selection policy information among step 4, the said ENUM inquiry HSS, during for CS territory network selection mode, execution in step 5, otherwise execution in step 7;
Step 5, said ENUM return the parsing failure command to said S-CSCF;
Step 6, said S-CSCF through the different field general terminals that MGCF/MGW is routed to the CS territory, accomplish call business to call out the back end;
Step 7, the said ENUM SIP URI number after said S-CSCF returns parsing;
Step 8, said S-CSCF directly are routed to said different field general terminal with call business.
Wherein, in order to realize business continuing more accurately, said step 6 can be specially:
Step 61, said S-CSCF are routed to MGCF/MGW with call business;
Step 62, said MGCF/MGW judge whether said call business is real time business, are execution in step 63 then, otherwise execution in step 64;
Step 63, said MGCF/MGW are routed to MSC with call business, and execution in step 65;
Step 64, said MGCF/MGW are routed to SMS/MMS with call business;
Step 65, MSC or SMS/MMS are routed to said different field general terminal with call business, accomplish and call out the back end.
Can know that by technique scheme the present invention obtains the login state of different field general terminal through ENUM, adopt the method for predetermined the whole network strategy, have following beneficial effect:
1, can improve the accuracy that network selection is hit according to the user registration state network selection;
2, the state transformation of having avoided the user to carry out has repeatedly reduced the requirement to systematic function.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is the system block diagram of CS territory in the prior art of the present invention and IMS field communication;
Fig. 2 is the block diagram of the IMS core network system embodiment 1 of support network selection of different field general terminal provided by the present invention;
Fig. 3 is the block diagram of the IMS core network system embodiment 2 of support network selection of different field general terminal provided by the present invention;
Fig. 4 is the block diagram of the IMS core network system embodiment 3 of support network selection of different field general terminal provided by the present invention;
Fig. 5 is the principle flow chart of the method for calling of different field general terminal provided by the present invention;
Fig. 6 is the flow chart of an embodiment of method shown in Figure 5.
Embodiment
For compatible CS territory of real performance different field general terminal and the professional advantage in IMS territory; Improve the network selection hit rate; Avoid in the prior art defective of Register Cancel repeatedly; The invention provides a kind of IMS core network system of supporting network selection of different field general terminal, realize calling out different field general terminal according to endpoint registration state and preset the whole network routing policy.Specifically describe through embodiment below.
Embodiment 1:
Referring to Fig. 2, comprise CS domain core net A, IMS domain core net B, CS domain core net A is connected through MGCF/MGW B4 with IMS domain core net B, also comprises different field general terminal C.So-called different field general terminal; Be meant that this terminal C uses the SIM+ISIM composite card in 2 generations or uses the USIM+ISIM composite card in 3 generations; Under the situation of same E.164 number; Just both can insert the IMS territory and use IMS professional, and can insert the CS territory again and use CS professional, and possibly use the business in two territories simultaneously.
Such as; When using 2 generation SIM+ISIM composite cards; Insert 2 generation network just can use 2 all generation CS territories and PS territory professional, also can insert the IMS territory through 2 generation GPRS, use the IMS professional (like instant message) of non real-time class and real-time type IMS business (like Multimedia session); When using 3 generation USIM+ISIM composite cards, insert 3 generation network just can use 3 all generation CS territories and PS territory professional, also can insert the IMS territory through 3 generation GPRS, use the IMS professional (like instant message) of non real-time class and real-time type IMS business (like Multimedia session).
In native system, IMS territory B comprises S-CSCF module B1, HSS B2, ENUM module B3, MGCF/MGW unit B 4.Comprise MSC A1 among the A of CS territory, HLR A2 and short message service (Short MessageService is called for short SMS)/multimedia messaging service, MMS (Multimedia Message Service is called for short MMS) center A3.
In the prior art; S-CSCF module B1 is through inquiring about attaching information at HSS B2; Obtain the E.164 analytic mappings relation of number and SIP URI number through ENUMB3 again, directly realize and the communicating by letter of terminal C, perhaps pass through communicating by letter of MGCF/MGW B4 realization and terminal C; This HSS has preserved the registration status information of terminal in the IMS territory, and this terminal is not limited only to different field general terminal C, also comprises terminal, common IMS territory.
In system provided by the present invention, the HSS B2 of said IMS territory B is used to preserve the network selection policy information, and this network selection policy information is a kind of the whole network policy information, does not promptly carry out traffic differentiation, and simple the setting is that CS territory A carries or IMS territory B carries.
The ENUM module B3 of IMS territory B is mutual with said HSS B2 and HLR A2 respectively, is used to obtain registration status information and the network selection policy information of different field general terminal C, and determines whether to return SIP URI number according to registration status information and network selection policy information.
For example, when ENUM B3 identification different field general terminal C after the registration, is a CS territory network selection according to the network selection strategy that obtains from HSS B2 simultaneously, then return the parsing failure command to S-CSCF in IMS territory B and CS territory A, then S-CSCF will call out the road automatically and swim over to MGCF/MGW.
In the present invention, HSS B2 is used to preserve the registration status information at network selection policy information and B terminal, IMS territory; Said HLR A2 is used to preserve the registration status information at A terminal, CS territory; If a different field general terminal has used the business of IMS territory B, also used the business of CS territory A, then the state of this terminal C is simultaneously in HSS B2 and HLR A2 registration.
In the present embodiment, ENUM B3 is specially said ENUM B3 alternately with HLR A2 and HSS B2 respectively and communicates by letter with HSS B2 with HLR A2 respectively and be connected.Concrete, the ENUM B3 of IMS territory B communicates by letter with HLR A2 through the MAP interface and is connected.
Simultaneously; In the present invention, MGCF/MGW B4 can carry out certain function to be improved, and promptly can distinguish real time business and non-real-time service; Real time business is sent to MSC; Non real-time short message service is sent to SMS/MMS, then can avoid MSC to transmit the problem of SMS/MMS, further raise the efficiency.
Embodiment 2:
Referring to Fig. 4, its composition module is same as shown in Figure 2, and difference is that said HLR A2 and said HSSB2 close and establishes, constitutes an integral device D; Said ENUM B3 is specially said ENUM B3 alternately and closes the integral device D that establishes and communicate by letter and be connected with HLR A2 and HSS B2 respectively.
Because HLR A2 and HSS B2 close and establish, connecting through internal interface is the development trend that mobile communications network merges, therefore, and the GSM after the scheme that present embodiment provided is more suitable for merging.
Embodiment 3:
Referring to Fig. 4, its composition module is same as shown in Figure 2, and difference is that communication is connected said HLR A2 with HSS B2, and said HLR A2 upgrades the registration status information at terminal, CS territory to said HSS B2.
Then said ENUM B3 is specially said ENUM B3 alternately with HLR A2 and HSS B2 respectively and communicates by letter with HSSB2 and be connected, and knows the CS territory endpoint registration state information that HLR A2 is provided indirectly.
The scheme that present embodiment provided need not HLR and HSS equipment are carried out large-scale redevelopment, and the system complexity of also having avoided the multiple connection between the equipment to cause increases, and only through the MAP interface is set in HSS, can realize being connected of HSS and HLR.
In the above-described embodiments, as different field general terminal C during as caller, because network selection initiatively, so it continues to use prior art system just can meet the demands.But when different field general terminal C when called; Then through system provided by the present invention; According to endpoint registration state at that time and preset network selection strategy,, determined to call out and be routed to IMS territory B or 2/3 generation CS territory A one of them is handled by the instruction that ENUM B3 returns.
Thus it is clear that, through the core network system of support different field general terminal provided by the present invention, can know current login state, and then improve the accuracy that network selection is hit at different core network; Simultaneously, the state transformation of having avoided the user to carry out has repeatedly reduced the requirement to systematic function.
Based on the core network system of above-mentioned support network selection of different field general terminal, the present invention also provides the method for calling of different field general terminal.Because different field general terminal is as broad as long with common terminal, IMS territory or terminal, CS territory as the processing method of caller, therefore repeat no more.Set forth as called processing method with regard to different field general terminal below.
Owing in the CS territory, do not have to carry out the module of number translated, therefore be difficult to generate strategy, simply reply way is that the business that the caller of CS territory is initiated is just carried out in the CS territory; Suppose not registration of user, then be routed to the IMS territory by the HLR instruction again in the CS territory.
,, different field general terminal, may further comprise the steps when making a call business for terminal, IMS territory referring to Fig. 5:
The S-CSCF in step 1, said IMS territory is to ENUM request analysis called number;
Step 3, said ENUM inquire about the whether registration in the CS territory of said different field general terminal, are execution in step 4 then, otherwise execution in step 7;
Preset network selection policy information among step 4, the said ENUM inquiry HSS, during for CS territory network selection mode, execution in step 5, otherwise execution in step 7;
Step 5, said ENUM return the parsing failure command to said S-CSCF;
Step 6, said S-CSCF through the different field general terminals that MGCF/MGW is routed to the CS territory, accomplish call business to call out the back end;
Step 7, the said ENUM SIP URI number after said S-CSCF returns parsing;
Step 8, said S-CSCF directly are routed to said different field general terminal with call business, accomplish and call out the back end.
In order further to raise the efficiency, when MGCF/MGW had increased professional recognition function, referring to Fig. 6, a specific embodiment of the present invention was:
Preset network selection policy information among step 105, the said ENUM inquiry HSS, during for CS territory network selection mode, execution in step 106, otherwise execution in step 112;
It should be noted last that; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and the scope of technical scheme of the present invention.
Claims (8)
1. IMS core network system of supporting network selection of different field general terminal; The IMS domain core net and the different field general terminal that comprise the CS domain core net, be connected through MGCF/MGW with the CS territory; Comprise service-call session control function module S-CSCF in the said IMS domain core net, it is characterized in that:
The HSS in said IMS territory is used to preserve the registration status information at network selection policy information and terminal, IMS territory;
The HLR in said CS territory is used to preserve the registration status information at terminal, CS territory;
The ENUM module in said IMS territory is mutual with said HSS and HLR respectively; Be used to obtain the registration status information and the network selection policy information of said different field general terminal, and determine whether to return SIP URI number to S-CSCF according to registration status information and network selection policy information;
Said S-CSCF is used for receiving after said ENUM module returns SIP URI number; Call business directly is routed to different field general terminal; When receiving the parsing SIP URI number failure command that said ENUM module returns, call business is routed to the different field general terminal in CS territory through MGCF/MGW.
2. IMS core network system according to claim 1 is characterized in that said ENUM is specially with HSS with HLR respectively alternately: said ENUM communicates by letter with HSS with HLR respectively and is connected.
3. IMS core network system according to claim 2 is characterized in that said ENUM is specially with HSS with HLR respectively alternately: said ENUM communicates by letter with said HLR through the MAP interface and is connected.
4. IMS core network system according to claim 1 is characterized in that said HLR and said HSS close to establish; Said ENUM is specially said ENUM alternately and closes the HLR that establishes and communicate by letter with HSS and be connected with HLR and HSS respectively.
5. IMS core network system according to claim 1 is characterized in that communication is connected said HLR with HSS, and said HLR upgrades the registration status information at terminal, CS territory to said HSS; Said ENUM is specially said ENUM alternately with HLR and HSS respectively and communicates by letter with HSS and be connected.
6. according to the arbitrary described IMS core network system of claim 1-5; It is characterized in that said MGCF/MGW communicates by letter with MSC and SMS/MMS respectively is connected; Be used to distinguish real time business and non-real-time service, and send real time business and give said MSC, send said non-real-time service and give said SMS/MMS.
7. method of calling based on the different field general terminal of the arbitrary said system of claim 1-6, it is characterized in that when terminal, IMS territory when different field general terminal makes a call business, may further comprise the steps:
The S-CSCF in step 1, said IMS territory is to ENUM request analysis called number;
Step 2, said ENUM inquire about the whether registration in the IMS territory of said different field general terminal, are execution in step 3 then, otherwise execution in step 5;
Step 3, said ENUM inquire about the whether registration in the CS territory of said different field general terminal, are execution in step 4 then, otherwise execution in step 7;
Preset network selection policy information among step 4, the said ENUM inquiry HSS, during for CS territory network selection mode, execution in step 5, otherwise execution in step 7;
Step 5, said ENUM return the parsing failure command to said S-CSCF;
Step 6, said S-CSCF through the different field general terminals that MGCF/MGW is routed to the CS territory, accomplish call business to call out the back end;
Step 7, the said ENUM SIP URI number after said S-CSCF returns parsing;
Step 8, said S-CSCF directly are routed to said different field general terminal with call business.
8. method of calling according to claim 7 is characterized in that said step 6 is specially:
Step 61, said S-CSCF are routed to MGCF/MGW with call business;
Step 62, said MGCF/MGW judge whether said call business is real time business, are execution in step 63 then, otherwise execution in step 64;
Step 63, said MGCF/MGW are routed to MSC with call business, and execution in step 65;
Step 64, said MGCF/MGW are routed to SMS/MMS with call business;
Step 65, MSC or SMS/MMS are routed to said different field general terminal with call business, accomplish and call out the back end.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102264988A CN101742693B (en) | 2008-11-13 | 2008-11-13 | IMS core network system supporting network selection of different field general terminal and calling method |
| PCT/CN2009/001261 WO2010054536A1 (en) | 2008-11-13 | 2009-11-13 | Core network system, device and calling method for supporting foreign domain terminal selecting network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102264988A CN101742693B (en) | 2008-11-13 | 2008-11-13 | IMS core network system supporting network selection of different field general terminal and calling method |
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| CN102857891B (en) * | 2011-06-27 | 2015-02-04 | 中国移动通信集团公司 | Domain selection method and domain selection system for called party and HSS(home subscriber server) in domain selection system |
| CN103581894B (en) * | 2012-08-09 | 2017-05-24 | 中兴通讯股份有限公司 | SRVCC same-number-supporting system and method |
| CN103369159B (en) * | 2013-07-08 | 2015-12-02 | 中国联合网络通信集团有限公司 | A kind of call processing method and equipment |
| CN104796482A (en) * | 2015-04-28 | 2015-07-22 | 上海新跃物流企业管理有限公司 | Intelligent converged communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1842211A (en) * | 2005-03-30 | 2006-10-04 | 华为技术有限公司 | Method and system for realizing route control |
| CN1878343A (en) * | 2005-06-07 | 2006-12-13 | 华为技术有限公司 | Called service route selecting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1842211A (en) * | 2005-03-30 | 2006-10-04 | 华为技术有限公司 | Method and system for realizing route control |
| CN1878343A (en) * | 2005-06-07 | 2006-12-13 | 华为技术有限公司 | Called service route selecting method |
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