The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2014
Filed:
Jul. 23, 2007
Maria Carmen Belinchón Vergara, Getafe, ES;
Germán Blanco, Paracuellos del Jarama, ES;
Juan Manuel Fernandez Galmes, Getafe, ES;
Hubert Przybysz, Hägersten, SE;
Andreas Schumacher, Stockholm, SE;
Stephen Terrill, Villanueva de la Cañada, ES;
Maria Carmen Belinchón Vergara, Getafe, ES;
Germán Blanco, Paracuellos del Jarama, ES;
Juan Manuel Fernandez Galmes, Getafe, ES;
Hubert Przybysz, Hägersten, SE;
Andreas Schumacher, Stockholm, SE;
Stephen Terrill, Villanueva de la Cañada, ES;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method is disclosed for use by an Interrogating Call/Session Control Function (I-CSCF) of an IP Multimedia Subsystem (IMS). In the method, a Session Initiation Protocol (SIP) message is received by the I-CSCF, which the I-CSCF attempts to forward to a Serving Call/Session Control Function (S-CSCF) of the IMS assigned to provide services to a user. If the attempt is determined to have failed, the I-CSCF sends a message to a Home Subscriber Server (HSS) of the IMS to request capabilities information for selecting a S-CSCF, the request message also providing first information relating to the status of the assigned S-CSCF. On receipt of the capabilities information at the I-CSCF from the HSS, the I-CSCF selects a replacement S-CSCF to provide services to the user. Related methods are also disclosed for use by the HSS and S-CSCF.