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:
Nov. 29, 2016
Filed:
Dec. 28, 2012
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Emiliano Merino Vazquez, Madrid, ES;
Tobias Austrell, Älvsjö, SE;
Francisca Bejarano Garcia, Madrid, ES;
David Heras Cano, Madrid, ES;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A Serving Call Session Control Function, S-CSCF, within an IP Multimedia Subsystem, IMS, core network. Notifications are sent to a Home Subscriber Server, HSS, of the IMS core network, indicating IMS registration state changes of users. Delivery failure of a notification of an IMS registration state change sent to a HSS and relating to a given user is detected. An association between an identifier of the given user and an indication of said delivery failure is stored in order to indicate a loss of IMS registration state synchronization for the given user between the S-CSCF and the HSS. An event requiring an IMS registration state change for the user is detected. A determination is made that a delivery failure indication associated with the user's identifier is stored. The HSS is notified indicating the required IMS registration state change and of a previous loss of the IMS registration state synchronization.