CN1610330A - Method for realizing local business in IP multimedia sub-system - Google Patents
Method for realizing local business in IP multimedia sub-system Download PDFInfo
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- CN1610330A CN1610330A CNA2003101017603A CN200310101760A CN1610330A CN 1610330 A CN1610330 A CN 1610330A CN A2003101017603 A CNA2003101017603 A CN A2003101017603A CN 200310101760 A CN200310101760 A CN 200310101760A CN 1610330 A CN1610330 A CN 1610330A
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Abstract
The local service realizing method in IP multimedia subsystem includes: for the roaming user to send local service request including user mark and requested local service mark to P-CSCF of the accessed network; for P-CSCF, after receiving the local service request of the roaming user, to find one S-CSCF for processing local service in the accessed network and to transmit the local service request to the S-CSCF; and for the S-CSCF, after receiving the local service request, to provide the roaming user with the local service. The present invention provides one completely new IMS local service realizing method and makes IMS local service realized flexibly and optimally.
Description
Technical field
The present invention relates to IP Multimedia System, refer to the implementation method of local service in a kind of IP Multimedia System especially.
Background technology
Development along with mobile communication technology, people no longer are satisfied with single voice communication mode, and multimedia communication mode that need be brand-new, this multimedia communication is not only simple video and audio communication, also comprise instant message, with the business that browses the location, collaborative work, Streaming Media or the like business, particularly new traffic mode and traditional voice merge.Trend based on Internet and communication network fusion, 3GPP has introduced the IP Multimedia System (IMS of all-IP business network framework on the basis of packet carrying network, IPMultimedia Subsystem), the target of IMS is according to personalized user data, the shielding user mode access, the degree of opening of control professional ability provides multimedia communication experiences.
Topmost functional entity is controlling call entity (CSCF among the IMS, Call Session ControlFunction) and home subscriber server (HSS, Home Subscriber Server), CSCF has three types: S-CSCF (Serving-Call Session Control Function, serving CSCF), P-CSCF (Proxy-Call Session Control Function, proxy CSCF), I-CSCF (InterrogatingCSCF, inquiry CSCF).P-CSCF is subscriber equipment first contact point at the IMS network, finishes agent functionality, accepts SIP (Session Initiation Protocol, initial session protocol) message and may carry out inter-process, then with its forwarding.I-CSCF considers the network security aspect, finishes network concealed function, and I-CSCF inquired about and determines the S-CSCF that the user serves to HSS when the user registered.The call state of S-CSCF recording user is finished CCF, is topmost operation controlling entity.Different S-CSCF is because application server (AS, the Application Server) difference that is connected can be finished different business functions.
HSS writes down each IMS user's user profile and business datum, cooperates CSCF to finish most important routing function, roaming function, and HSS provides authentication, mandate, IMSI/IP map addresses, position location functionality or the like simultaneously.User profile comprises: Subscriber Number, address information; The security information that is used for authentication and authorization; Support the positional information between user's registration, record different system; User characteristic data.Business datum comprises service trigger criteria and the professional logic that triggers.
From the mobility of IMS, when the user roamed out home network, all business of user all were routed to home network by the P-CSCF on visit ground, by the S-CSCF of home network business were mapped to this locality or third party.The key of this model is the S-CSCF control customer service by home network, no matter whether the user roams, use which kind of equipment and access network, what the user was unique controls via home network, its advantage is to guarantee professional consistency, simplicity, as shown in Figure 1.
The IMS local service refers to the business that accesses network provides to the user who roams into this ground, and local service can comprise: insert local numbering plan; Address translation; Business relevant such as transport information etc. with the user geographical position.The local service that accesses network provides may not need user signing contract information.Provide framework based on above-mentioned IMS business, when the roamer asks the local service of accesses network, also be that S-CSCF and application server AS by home network provides professional, this mode can not provide local service well, for example local numbering plan, the local numbering plan of all-access network can't be known in the application server AS of home network, functions such as FH-number transform and correct route can not be finished.
In the existing 3GPP standard, for local service, adopted and the identical network frame of non-local service, promptly when the user roams into accesses network, the P-CSCF of accesses network is routed to home network with service request, the S-CSCF of home network is according to local service sign in the customer service request, and respective application server AS provides professional in the triggering home network, as carries out FH-number transform etc.Like this, require to provide in the home network application server AS of local service to understand routing iinformation of the local service access code of all accesses network that local service can be provided, local numbering plan and local and location-dependent services or the like.This demand of AS is difficult to realize in real network is built, the numbering plan of a certain operator other networks of impossible understanding and operator and local service access code etc.And, not needing the user signatory in HSS in advance for some local services, there is unreasonable part in above-mentioned network frame to solving the IMS local service, and optimizes inadequately on Business Processing.
Summary of the invention
In view of the shortcoming of above-mentioned prior art, the invention provides that a kind of Business Processing is more flexibly and the local service implementation method of optimizing in IP Multimedia System.
The implementation method of local service of the present invention comprises the following steps:
(1) roamer initiates the local service request to the agent call controlled entity (P-CSCF) of accesses network, comprises the local service sign of user ID and request in this local service request;
(2) after P-CSCF receives roamer's local service request, in this accesses network, seek the service call controlled entity (S-CSCF) that to handle local service, and this local service request is transmitted to this S-CSCF;
(3) after S-CSCF receives above-mentioned local service request, provide local service to this roamer.
According to said method of the present invention, described step (3) also includes the following step:
(31) after S-CSCF receives service request,, need to judge whether user signing contract information, if not, then provide the local service of request to this roamer according to service attribute; If carry out the following step;
(32) S-CSCF is according to the user ID in the service request, the user signing contract information of asking this roamer to the home subscriber server (HSS) of home network;
(33) HSS returns corresponding user signing contract information;
(34) S-CSCF judges according to the user signing contract information that returns whether this user has the service authority of this requested service, if then provide the local service of request to this roamer, otherwise refusal provides this local service.
According to said method of the present invention, also include the step whether S-CSCF judges self can provide the local service that the user asks, if the local service of request then directly is provided to this roamer; Otherwise triggering energy provides the application server of this local service, and the local service of this request is provided by this application server.
The local service of described request including, but not limited to: insert local numbering plan; Address translation; The business relevant with the user geographical position.
According to said method of the present invention,, then in the local service request, also include user's current position information if the local service of roamer's request is relevant with the user geographical position.
The present invention proposes a kind of implementation method of brand-new IMS local service.Adopt the inventive method can make the realization of IMS local service more flexible, on Business Processing, optimize more.
Description of drawings
The IMS business of Fig. 1 when the user roams in the prior art provides network frame.
Fig. 2 is the network frame that IMS local service of the present invention is realized.
Embodiment
For realizing the IMS local service better, the present invention has determined network frame as shown in Figure 2.
When local service was provided, the function that each related network entity provides was as follows:
Subscriber equipment (UE) function comprises: comprise the local service sign in service request; For the local service relevant, in service request, comprise the subscriber equipment current position information, as cell ID etc. with the geographical position.
The P-CSCF function comprises: the local service sign in the request of identification customer service; Inquire the S-CSCF that local service can be provided according to configuration information or alternate manner.
The S-CSCF function comprises: the local service sign in the request of identification customer service; Judge whether to belong to signing service according to service attribute; Judge service authority according to user signing contract information; The processing of local service is provided; Trigger the corresponding application server processes local service that local service is provided.
AS (application server) function comprises: the processing of local service is provided.
The HSS function comprises: the user signing contract information of storage local service; The user signing contract information inquiry of network S-CSCF of accepting the interview, and return user signing contract information.
At above-mentioned network frame, the realization flow of IMS local service is as follows:
(1) roamer initiates the local service request to the P-CSCF of accesses network, comprises local service sign and user ID in service request; For some local service relevant, in service request, also comprise user's current position information, as cell ID etc. with the user geographical position;
(2) after P-CSCF received roamer's service request, recognizing this was a local service, sought the S-CSCF that can handle local service in this accesses network, and this service request is issued S-CSCF, comprised the local service sign in the service request; For some local service relevant, in service request, also comprise user's current position information, as cell ID etc. with the user geographical position;
(3) after S-CSCF received service request, recognizing this was a local service, according to service attribute, and to whether needing user signing contract information to judge, user signing contract information if desired, execution in step (4) then, otherwise direct execution in step (5);
(4) S-CSCF is according to the user ID in the service request, and to the user signing contract information that the HSS of home network asks this roamer, HSS returns corresponding user signing contract information; S-CSCF judges according to user signing contract information whether the user has service authority, if the user has this service authority, and execution in step (5) then, if user's this service authority not, then refusal provides this local service;
(5) if S-CSCF itself can provide this local service, then directly provide professional to the user, do not need to trigger other AS; If S-CSCF itself does not provide this local service, need AS to provide, then trigger the application server AS that local service is provided, provide professional by AS, as FH-number transform, number translation etc.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (5)
1, the implementation method of local service in a kind of IP Multimedia System comprises the following steps:
(1) roamer initiates the local service request to the agent call controlled entity (P-CSCF) of accesses network, comprises the local service sign of user ID and request in this local service request;
(2) after P-CSCF receives roamer's local service request, in this accesses network, seek the service call controlled entity (S-CSCF) that to handle local service, and this local service request is transmitted to this S-CSCF;
(3) after S-CSCF receives above-mentioned local service request, provide local service to this roamer.
2, the implementation method of local service in a kind of IP Multimedia System as claimed in claim 1, it is characterized in that: described step (3) also includes the following step:
(31) after S-CSCF receives service request,, need to judge whether user signing contract information, if not, then provide the local service of request to this roamer according to service attribute; If carry out the following step;
(32) S-CSCF is according to the user ID in the service request, the user signing contract information of asking this roamer to the home subscriber server (HSS) of home network;
(33) HSS returns corresponding user signing contract information;
(34) S-CSCF judges according to the user signing contract information that returns whether this user has the service authority of this requested service, if then provide the local service of request to this roamer, otherwise refusal provides this local service.
3, the implementation method of a kind of IP multimedia as claimed in claim 1 or 2 local service in system, it is characterized in that: also include the step whether S-CSCF judges self can provide the local service that the user asks, if, the then direct local service that request is provided to this roamer; Otherwise triggering energy provides the application server of this local service, and the local service of this request is provided by this application server.
4, the implementation method of local service in a kind of IP Multimedia System as claimed in claim 3, it is characterized in that: the local service of described request can be: one of insert in local numbering plan, address translation, the business relevant with the user geographical position or the combination of any a plurality of business.
5, the implementation method of local service in a kind of IP Multimedia System as claimed in claim 1 or 2, it is characterized in that:, then in the local service request, also include user's current position information if the local service of roamer's request is relevant with the user geographical position.
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| CNB2003101017603A CN100372338C (en) | 2003-10-23 | 2003-10-23 | Method for realizing local business in IP multimedia sub-system |
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| CNB2003101017603A CN100372338C (en) | 2003-10-23 | 2003-10-23 | Method for realizing local business in IP multimedia sub-system |
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| CN1610330A true CN1610330A (en) | 2005-04-27 |
| CN100372338C CN100372338C (en) | 2008-02-27 |
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