IMS subscriber access control

Details IMS subscriber access control IMS subscriber access control

2011-03-29

2011-03-29

Kuntz, Curtis (Department: 2614)

Telephonic communications

Special services

Service trigger

C379S142030, C379S142050

Reexamination Certificate

active

07916850

ABSTRACT:
A method of controlling subscriber access to SIP-based services facilitated by an IP Multimedia Subsystem. The method comprises defining at a Serving Call Session Control Function node at least one default screening trigger, and downloading from a Home Subscriber Subsystem, specific screening triggers allocated to at least certain subscribers. At the Serving Call Session Control Function node, at least certain SIP messages originating at subscriber terminals are intercepted and, for each intercepted message and in the absence of a matching specific screening trigger, the default trigger is activated so as to cause the SIP message to be forwarded to a specific SIP application service.

REFERENCES:
patent: WO 03/056781 (2003-07-01), None
“Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); IP Multimedia (IM) session handling; IM call model; Stage 2 (3GPP TS 23.218 version 5.5.0 Release 5); ETSI TS 123 218” ETSI Standards, European Telecommunications Standards Institute, Sophia-Antipo, FR, vol. 3-CNl, No. V550, Jun. 2003, XP014007861 ISSN: 0000-0001 pp. 7-8 pp. 11-19 pp. 34-37.
3GPP, 3rdGeneration Partnership Project: Technical Specification Group Core Network and Terminals; IP Multimedia (IM) Subsystem CX and DX Interfaces; Signalling Flows and Message Contents (Release 5), 3GPP TS 29,228 v5.16.0 (Jun. 2006), Sophia Antipolls France.
Rosenburg, et al. SIP: Session Initiation Protocol. Network Working Group. Request for Comments: 3261. Jun. 2002.

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