METHOD AND DEVICE FOR PROVIDING SERVICES FOR USER

• US 20100278041A1
• Filed: 07/16/2010
• Published: 11/04/2010
• Est. Priority Date: 01/18/2008
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: SHI, Shufeng
• Granted Patent: US 8,379,650 B2
• Time in Patent Office: Days
• US Class Current: 370/225
• CPC Class Codes: H04L 65/00 Network arrangements, protocols or services for supporting real-time applications in data packet communication real-time or near real-time messaging, e.g. instant messaging [IM] H04L51/04; selective video distribution H04N21/00
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities

Abstract

A method and a device for providing services for a user are provided. The method includes receiving, by an interrogating call session control function (I-CSCF), a failure response returned by a first serving call session control function (S-CSCF) after the I-CSCF selects the first S-CSCF for the user according to a capability set of an S-CSCF returned by a home subscriber server (HSS) and forwards a service request to the first S-CSCF; obtaining, by the I-CSCF, information of a second S-CSCF, and forwarding the service request from the user to the second S-CSCF. Therefore, when multiple identities of the user simultaneously generate unregistered services, when they generate registration requests at the time of generating unregistered services, or when they simultaneously generate registration requests, the I-CSCF forwards the service request from the user to a corresponding S-CSCF for processing, thus enabling a network to normally provide services for the user.

Claims

1. A method for providing services for a user, comprising:

receiving, by an interrogating call session control function (I-CSCF), a failure response returned by a first serving call session control function (S-CSCF) after the I-CSCF selects the first S-CSCF for the user and forwards a service request to the first S-CSCF; and

obtaining, by the I-CSCF, information of a second S-CSCF, and forwarding the service request from the user to the second S-CSCF, wherein the second S-CSCF is the one assigned by a home subscriber server (HSS) for the user.

2. The method for providing services for a user according to claim 1, wherein before the I-CSCF receives the failure response returned by the first S-CSCF, the method further comprises:

returning, by the HSS, failure indication information to the first S-CSCF after the HSS receives a request for requesting subscription data of the user sent by the first S-CSCF and it is determined that a stored name of the S-CSCF assigned to the user is not the same as that of the first S-CSCF; and

returning, by the first S-CSCF, the failure response to the I-CSCF according to the failure indication information.

3. The method for providing services for a user according to claim 1, wherein the obtaining, by the I-CSCF, the information of the second S-CSCF comprises:

requesting from the HSS, by the I-CSCF, the name of the second S-CSCF, and receiving, by the I-CSCF, the name of the second S-CSCF returned by the HSS.

4. The method for providing services for a user according to claim 3, wherein the forwarding, by the I-CSCF, the service request from the user to the second S-CSCF comprises:

forwarding, by the I-CSCF, the service request from the user to the second S-CSCF according to the name of the second S-CSCF returned by the HSS.

5. The method for providing services for a user according to claim 2, wherein the receiving, by the I-CSCF, the failure response returned by the first S-CSCF comprises:

returning, by the HSS, the failure indication information carrying the name of the second S-CSCF to the first S-CSCF; and

receiving, by the I-CSCF, the failure response carrying the name of the second S-CSCF and sent by the first S-CSCF according to the failure indication information.

6. The method for providing services for a user according to claim 5, wherein the obtaining, by the I-CSCF, the information of the second S-CSCF comprises:

obtaining, by the I-CSCF, the information of the second S-CSCF from the failure response carrying the name of the second S-CSCF.

7. The method for providing services for a user according to claim 1, wherein after the I-CSCF forwards the service request from the user to the second S-CSCF, the method further comprises:

requesting from the HSS, by the second S-CSCF, the subscription data of the user; and

receiving, by the second S-CSCF, the subscription data of the user returned by the HSS, and processing the service request from the user.

8. A device for providing services for a user, comprising:

a response receiving module, adapted to receive a failure response returned by a first serving call session control function (S-CSCF) after the first S-CSCF is selected for the user and a service request is forwarded to the first S-CSCF;

a second S-CSCF obtaining module, adapted to obtain information of a second S-CSCF after the failure response returned by the first S-CSCF is received, wherein the second S-CSCF is the one assigned by a home subscriber server (HSS) for the user; and

a request forwarding module, adapted to forward the service request from the user to the second S-CSCF after the information of the second S-CSCF is obtained.

9. The device for providing services for a user according to claim 8, wherein the device is an interrogating call session control function (I-CSCF).

10. The device for providing services for a user according to claim 9, further comprising:

a first S-CSCF obtaining module, adapted to request, from an HSS, a capability set of an S-CSCF, select a first S-CSCF for the user according to the capability set of the S-CSCF returned by the HSS, and forward the service request from the user to the first S-CSCF.

11. The device for providing services for a user according to claim 10, wherein the second S-CSCF obtaining module is further adapted to request, from the HSS, the name of the S-CSCF and receive the name of the second S-CSCF returned by the HSS after receiving the failure response returned by the first S-CSCF.

12. The device for providing services for a user according to claim 10, wherein the response receiving module is further adapted to receive the failure response carrying the name of the second S-CSCF and returned by the first S-CSCF;

and the second S-CSCF obtaining module is adapted to obtain the information of the second S-CSCF according to the received failure response carrying the name of the second S-CSCF and returned by the first S-CSCF.

13. A system for providing services for a user, comprising:

an interrogating call session control function (I-CSCF), configured to select a first serving call session control function (S-CSCF) for the user and forward a service request to the first S-CSCF;

the first S-CSCF, configured to return a failure response to the I-CSCF according to a failure indication information returned by the HSS;

the HSS, configured to return the failure indication information to the first S-CSCF after the HSS receives a request for requesting subscription data of the user sent by the first S-CSCF and it is determined that a stored name of the S-CSCF assigned to the user is not the same as that of the first S-CSCF; and

the I-CSCF, further configured to obtain information of a second S-CSCF after the I-CSCF receives the failure response returned by the first S-CSCF.

14. The system for providing services for a user according to claim 13, wherein

the HSS, further configured to return the failure indication information carrying the name of the second S-CSCF to the first S-CSCF;

and

the I-CSCF, further configured to receive the failure response, which is sent by the first S-CSCF according to the failure indication information, carrying the name of the second S-CSCF.

15. The system for providing services for a user according to claim 13, wherein

the I-CSCF, further configured to forward the service request from the user to the second S-CSCF, wherein the second S-CSCF is the one assigned by the HSS for the user.