WO2011017984A1

WO2011017984A1 - Application server(as) subscription processing method and system for internet protocol multimedia subsystem(ims)

Info

Publication number: WO2011017984A1
Application number: PCT/CN2010/074435
Authority: WO
Inventors: 李世涛; 缪永生
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-08-12
Filing date: 2010-06-24
Publication date: 2011-02-17
Also published as: CN101998356B; CN101998356A

Abstract

A processing method and a system for Application Server (AS) subscription in Internet Protocol Multimedia Subsystem (IMS), which are used to resolve the following technical problem: when a certain public user identity(PUI) is deleted, other PUIs in the implicit registration set which the deleted PUI belongs to will be unavailable, and Serving Call Session Control Function(S-CSCF) will be unable to transmit subscription information of the other PUIs which belong to the same implicit registration set with the deleted PUI to the AS. If the AS receives a notification that a certain PUI is deleted from an implicit registration set which the certain PUI belongs to, the AS will initiate new subscription requests to other PUIs in registered status, wherein the other PUIs and the deleted PUI are in the same implicit registration set. The processing system does not need to modify the framework of current IMS, therefore can avoid the impacts to other users in the entire service profile (SP) effectively when a certain PUI is deleted.

Description

Processing method and system for AS initiated subscription in IP multimedia subsystem

The present invention relates to the field of communications, and in particular, to a method and system for processing an AS initiated subscription in an IP multimedia subsystem. Background technique

1 is a system architecture diagram of an IP Multimedia Core Subsystem (IMS), mainly composed of a user equipment UE (101), an IMS core network session control function entity (CSCF) device, and a proxy CSCF (Proxy). Call Session Control Function (P-CSCF) / Interrogating Call Session Control Function (I-CSCF) (102), Service CSCF (Serving Call Session Control Function, S-CSCF) (103), Application Server (Application Server) , AS) (104), consisting of Home Subscriber Server (HSS) (105). Between the various network elements shown, the UE is connected to the P-CSCF through the Gm interface; the P-CSCF, the I-CSCF, and the S-CSCF are interconnected through the Mw interface; the HSS is implemented through the Cx interface with the I-CSCF, S- The CSCF is connected to the AS through the Sh interface. The S-CSCF is connected to the AS through an ISC (IMS Service Control, ISDN) interface.

The P-CSCF acts as the first point of contact for users in the IMS system. All Session Initiation Protocol (SIP) signaling must pass through the P-CSCF whether it is from the UE or to the UE. The S-CSCF is the core of the IMS and is located in the home network to perform session control and registration services for the UE. After the UE successfully registers in the IMS system, the S-CSCF locally stores the Public User Identity (PUI), the Private User Identity (PVI), and the Private User Identity (PVI) of the UE used by the UE to register in the IMS system. Relevant information such as the implicit registration set corresponding to the PUI. After the registration is successful, the S-CSCF also needs to subscribe to the application service of the user. The AS initiates a third-party registration so that the application server devices that the user subscribes to can serve the user well.

The AS is used to provide application services, handle registration requests initiated by the S-CSCF, and initiate subscriptions for users.

The HSS is the storage core of all user and server related data in the IMS system, and stores user and server related data. When the AS or S-CSCF needs to query user information, it can query the HSS through the Sh interface or the Cx interface.

Figure 2 depicts the relationship diagram of the user registration set in the IMS system. One PVI can correspond to multiple PUIs. These PUIs can be in an implicit registration set. A user belonging to an implicit registration set in the IMS system has such a feature that when one of the PUIs is successfully registered, all other PUIs in the implicit registration set are successfully registered, but when one of the PUIs is successfully logged off, Other PUIs in the implicit registration set are also logged out at the same time. In an implicit registration set, different user subscription data sets (SPs) can also be assigned. For example, PUI 1 and PUI2 described in the figure belong to SP 1 , and PUI 3 belongs to SP 2. The PUIs under the same SP have the same subscription data, corresponding to the same AS for their services.

FIG. 3 is a flow chart of a AS initiating a subscription for a user in the prior art, where:

Step 301: The user initiates a registration request by using PUI 1;

Step 302: The P-CSCF routes the registration request to the S-CSCF that can serve the user. Step 303: After the registration is successful, the S-CSCF returns a registration completion response, where the

PUI 1 is in the implicit registration set of all PUI information, such as PUI 1, PUI 2, PUI 3. The status of these PUIs is marked as registered status;

Step 304: The P-CSCF returns a registration completion response to the user UE by using a routing mechanism in the IMS system.

Step 305: After the UE is successfully registered, the S-CSCF initiates a third-party registration request for each SP in the UE implicit registration set, and each third-party registration request selects any PUI in the SP. Initiating, in this example, selecting PUI 1 for the third-party registration request initiated by SP1;

Step 306, after receiving the third-party registration request, the AS 1 queries the HSS for the user information of the PUI 1;

Step 307: The HSS may return, to the AS 1, all PUI information in the implicit registration set of the PUI 1 and related subscription services;

Step 308: After receiving the user information returned by the HSS, the AS 1 returns a registration completion response to the S-CSCF.

Step 309: After the third party successfully registers, the AS1 selects the PUI used by the third party to initiate the subscription for the SP1, and in this example, uses the PUI 1 to initiate the subscription;

Step 310: The S-CSCF returns a subscription success response.

Step 311: At this time, the S-CSCF can send user data to all PUIs in the SP1 through the subscription relationship, including information such as the valid registration duration, registration status, and contact address of the PUI; Step 312, when the PUI1 is for some reason Not available (such as PUI 1 arrears), HSS needs to remove PUI1 from its implicit registration set;

Step 313: The HSS sends a notification to the S-CSCF to delete the PUI 1 from the implicit registration set to which it belongs;

Step 314, the S-CSCF notifies the AS 1 that the PUI 1 has been deleted from the implicit registration set to which it belongs;

Step 315, the AS 1 replies to the S-CSCF to confirm;

Step 316, since the previous subscription is initiated by the PUI 1, when the PUI 1 is deleted, the subscription relationship between the S-CSCF and the AS 1 regarding the SP1 no longer exists.

Step 317, at this time, there is still a user PUI 2 in the SP1. Since the subscription relationship no longer exists, the S-CSCF can no longer send the subscription information about the PUI 2 to the PUI 2.

Since PUI 1 and PUI 2 are under the same SP, in step 203, the S-CSCF will only use one of the PUIs to initiate a third party registration, so in step 207, AS 1 is also only Use this PUI to initiate a subscription. According to the prior art, when the HSS deletes the PUI 1, the subscription relationship between the S-CSCF and the AS 1 regarding the PUI 1 and all other PUIs in the same SP does not exist, and the S-CSCF can no longer use the original subscription. The relationship sends AS 1 subscription information about the users in this SP. But actually PUI 2 can still be used for the UE, but the S-CSCF can no longer send subscription information about PUI 2 to AS 1. Summary of the invention

The present invention provides a method and system for processing an AS subscription in an IP multimedia subsystem, which is used to solve the problem that when a PUI is deleted, the subscription relationship of other PUIs belonging to the same SP as the PUI is also cancelled, and the other PUIs cannot be continued. Technical problem of the subscription, in order to achieve the above object, the technical solution of the present invention is:

A method for processing an AS subscription in an IP multimedia subsystem, including:

After the application server (AS) receives a notification that a shared user identifier (PUI) is deleted from the implicit registration set to which it belongs, the application server selects the same implicit registration set that belongs to the deleted PUI. A new subscription request is initiated by other PUIs in the registration state with the same user subscription data set (SP).

Further, after the deleted PUI is deleted from the implicit registration set to which the deleted PUI belongs, the application server acquires the same implicit registration with the deleted PUI by sending a query request to the home subscriber server (HSS). Sets other PUI information in the same state as the SP, and then initiates a new subscription request.

Further, in the third-party registration process before the deleted PUI is deleted from the implicit registration set to which the deleted PUI is deleted, the application server will query all the implicit registrations of the deleted PUI obtained from the HSS. The PUI information is stored in the application server; after the deleted PUI is deleted from the implicit registration set to which the deleted PUI belongs, the application server stores all the PUIs in the implicit registration set according to the locally stored deleted PUI. Information, obtaining the same implicit registration set that belongs to the deleted PUI and other PUIs in the same state of the same SP. Information, and then initiate a new subscription request.

Based on the foregoing method, the present invention also provides a processing system for AS subscription in an IP multimedia subsystem, including:

a Service Session Control Function Entity (S-CSCF) for performing session control and registration services; AS, for providing an application service, processing a registration request initiated by the S-CSCF, and initiating a subscription for the user;

HSS, used to store user and server related data;

It is characterized in that

The AS is further configured to: after receiving the notification that a certain PUI is deleted from the implicit registration set to which the PUI belongs, select the same implicit registration set and the other SP of the same SP that are deleted with the deleted PUI. State the PUI and initiate a new subscription request.

Further, the AS is further configured to: after the deleted PUI is deleted from the implicit registration set to which the deleted PUI is deleted, send a query request to the HSS to obtain the same other implicit registration set as the deleted PUI. PUI information in the registered state.

Further, the AS is further configured to: in the third-party registration process before the deleted PUI is deleted from the implicit registration set to which the deleted PUI is located, the implicit registration of the deleted PUI obtained from the HSS query All the PUI information is stored in the application server, and after the deleted PUI is deleted from the implicit registration set to which it belongs, according to the locally stored information of all PUIs in the implicit registration set of the deleted PUI. And acquiring the same implicit registration set and the other PUI information of the same SP in the same state as the deleted PUI.

With the present invention, for a subscriber-initiated subscription relationship, even if one of the user's PUIs is deleted, the PUI in the other SPs can be used to initiate a subscription, so that the network can deliver important subscription data for the user. The invention does not need to modify the existing IMS architecture, and only needs to add an improvement on the AS to effectively prevent other users in the entire SP from being affected when a certain PUI is deleted. DRAWINGS

Figure 1 is a block diagram of a known IMS system;

2 is a diagram of a known IMS user registration set relationship;

3 is a flow chart of a known AS initiating a subscription for a user;

Figure 4 is a flow diagram of an improved AS initiating a subscription for a user. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

4 is a flow diagram of a user initiating a subscription using the improved AS of the present invention. In this example, the user relationship described in FIG. 2 is adopted, that is, the UE has one PVI, and three PUIs are in the same implicit registration set, PUI 1 and PUI 2 belong to the same SP 1 , and PUI 3 belongs to SP2.

The specific process is as follows:

Step 401: The user initiates a registration request by using PUI 1;

Step 402: The P-CSCF routes the registration request to the S-CSCF that can serve the user. Step 403: After the registration is successful, the S-CSCF returns a registration completion response, where the PUI is carried.

1 All PUI information in the implicit registration set, such as PUI 1, PUI 2, PUI 3. The status of these PUIs is marked as registered status;

Step 404: The P-CSCF returns a registration completion response to the user UE by using a routing mechanism in the IMS system.

Step 405: After the UE is successfully registered, the S-CSCF initiates a third-party registration request for each SP in the UE implicit registration set, and each third-party registration request selects any PUI initiated in the SP, in this example, the SP1 initiated. The three-party registration request selects PUI 1;

Step 406: After receiving the third-party registration request, the AS 1 queries the HSS for the user information of the PUI 1;

Step 407, the HSS may return all PUI letters in the implicit registration set of the PUI 1 to the AS 1 Information and related contracting services;

Step 408: After receiving the user information returned by the HSS, the AS 1 returns a registration completion response to the S-CSCF.

Step 409: After the third party successfully registers, the AS1 selects the PUI used by the third party to initiate the subscription for the SP1, and in this example, uses the PUI 1 to initiate the subscription;

Step 410: The S-CSCF returns a subscription success response.

Step 411, the S-CSCF can send user data to all the PUIs in the SP1 through the subscription relationship, including information such as the valid registration duration, registration status, and contact address of the PUI; Step 412, when the PUI 1 is The reason cannot be used (such as PUI 1 arrears), HSS needs to delete PUI 1 from its implicit registration set;

Step 413: The HSS sends a notification to the S-CSCF that the PUI 1 is deleted from the implicit registration set to which the PUI 1 belongs.

Step 414, the S-CSCF notifies the AS 1 that the PUI 1 has been deleted from the implicit registration set to which it belongs;

Step 415, the AS 1 replies to the S-CSCF for confirmation;

Since the previous subscription was initiated by PUI 1, when PUI 1 is deleted, the subscription relationship between S-CSCF and AS 1 about SP1 and all other PUIs in the same SP no longer exists.

Step 416, when the AS 1 learns that the PUI 1 is unavailable, and deletes from the implicit registration set to which it belongs, sends a query request to the HSS to obtain all PUI information in the SP1 where the PUI 1 is located; optionally, if the application server is If the user's PUI information is stored, that is, if there is a PUI 2 in the SP1 to which the PUI 1 belongs, step 416, step 417, and step 418 may be omitted.

Step 417, the HSS returns user data to the AS 1 , and mainly includes all PUI information in the SP 1 where the PUI 1 is located;

Step 418, AS 1 judges the acquired data, and checks whether there are other places in SP1. The PUI in the registration state is available, in this example, PUI 2 is found to be available;

Step 419, the AS1 re-initiates the subscription request to the S-CSCF by using the PUI 2, and establishes a subscription relationship between the SP1 and the S-CSCF;

Step 420: The S-CSCF replies to the subscription success response.

Step 421: At this time, the S-CSCF can send the user-related information to other PUI users in the SP1 by using the newly established subscription relationship.

In summary, the method of the present invention does not need to modify the existing IMS architecture, and only needs to add an improvement on the AS to effectively prevent other users in the entire SP from being affected when a PUI is deleted.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for processing an AS subscription in an IP multimedia subsystem, comprising: receiving, by an application server (AS), a notification that a shared user identifier (PUI) is deleted from an implicit registration set to which it belongs Afterwards, the application server selects another PUI that belongs to the same implicit registration set and the same user subscription data set (SP) as the deleted PUI to initiate a new subscription request.

2. The method according to claim 1, wherein after the deleted PUI is deleted from an implicit registration set to which the deleted PUI belongs, the application server passes the server to the home subscriber.

(HSS) sends a query request to obtain the same implicit registration set as the deleted PUI and other PUI information of the same SP in the registered state, and then initiates a new subscription request.

The method according to claim 1, wherein in the third-party registration process before the deleted PUI is deleted from the implicit registration set to which the deleted PUI is deleted, the application server may obtain the query from the HSS. All PUI information in the implicit registration set to which the deleted PUI belongs is stored in the application server; after the deleted PUI is deleted from the implicit registration set to which the deleted PUI belongs, the application server is configured according to the local storage. The information of all the PUIs in the implicit registration set of the deleted PUI belongs to the same implicit registration set and the other PUI information of the same SP in the registered state, and then initiates a new subscription request.

4. An AS subscription processing system in an IP multimedia subsystem, comprising:

HSS, used to store user and server related data;

It is characterized in that

The AS is also used to receive a deletion about a PUI from an implicit registration set to which it belongs. After the notification, the PUI that belongs to the deleted PUI belongs to the same implicit registration set and other PUIs in the registration state of the same SP, and initiates a new subscription request.

The system according to claim 4, wherein the AS is further configured to send a query request to the HSS to obtain the same queried after the deleted PUI is deleted from the implicit registration set to which the deleted PUI belongs. The deleted PUI belongs to other PUI information of the same implicit registration set that is in the registered state.

The system according to claim 4, wherein the AS is further configured to query from the HSS in a third-party registration process before the deleted PUI is deleted from the implicit registration set to which the deleted PUI is deleted. All obtained PUI information in the implicit registration set to which the deleted PUI belongs is stored in the application server, and after the deleted PUI is deleted from the implicit registration set to which it belongs, according to the locally stored The information of all the PUIs in the implicit registration set of the deleted PUI belongs to the same implicit registration set and the other PUI information of the same SP in the registered state.