Method and system for P-CSCF to identify forbidden calling subscriber

Abstract

The present invention provides a P-CSCF calling forbidden user identifying method and system which is used in an IP multimedia subsystem, wherein, the method comprises the following processes: during the S-CSCF inception registering process of the equipment of the user, the S-CSCF carries the information of the calling forbidden user in a response message of a structural registering success; after receives the response message of registering success, the P-CSCF updates the information of the calling forbidden user and the information of the non-forbidden user according to the response messageof registering success; when a home subscriber server informs the S-CSCF that the identity identification of the user is revised as the calling forbidden, the S-CSCF carries the information of the calling forbidden user in a structural subscribed informing message; after receives the subscribed informing message, the P-CSCF analyzes the subscribed informing message, to update the information of the calling forbidden user and the information of the non-forbidden user.

Description

technical field [0001] The present invention relates to the communication field, and in particular, relates to a method and a system for a Proxy Call Session Control Function (P-CSCF) in an IP multimedia subsystem to identify a barred user. Background technique [0002] If an IP Multimedia Subsystem (IP Multimedia Core Network Subsystem, IMS) user wants to have a session, he needs to register first, and the registration process is to register his location on the network. [0003] The Subscribe / Notify mechanism enables network entities to subscribe to a certain resource state, and when the resource state changes, the network entity in charge of the resource can notify the subscriber. After the registration is successful, P-CSCF (Proxy Call Session Control Function, proxy call session control function) will establish a subscription to the user registration status to S-CSCF (Serving Call Session Control Function, service call session control function), so that the user registra...

AI Technical Summary

Problems solved by technology

[0036] 1. After the initial registration is successful through P-CSCF, I-CSCF, S-CSCF, and HSS, if the barred user immediately initiates a logout, since the P-CSCF cannot obtain the barred public identity information, the P-CSCF checks that the user data does not exist , will deny the user's logout

[0037] 2. The originating user uses the barred public identity to initiate a session. Because the P-CSCF cannot recognize the barred public identity in the existing mechanism, when the user initiates a session, the P-CSCF judges that the user’s public identity carried in the session message does not exist. , the P-CSCF will modify the session request (replacing the original public identity with a registered default user public identity), and route the session to the S-CSCF, which causes the user to initiate a call with the barred public identity and can also pass the P- The CSCF routes to the S-CSCF, and the S-CSCF also believes that the call is legal, so the IMS system cannot barred the call of the barred user's public identity

[0038] 3. The HSS modifies the user's public identity to barred, sends a notification to inform the S-CSCF, and the S-CSCF sends a subscription notification to the P-CSCF. The message will only carry a non-barred public identity, and the P-CSCF will not be able to perceive the user's change to bar red

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