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:
Dec. 31, 2019
Filed:
Feb. 27, 2015
Applicant:
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Inventors:
Magnus Hallenstål, Täby, SE;
Fredrik Lindholm, Tokyo, JP;
Assignee:
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 12/04 (2009.01); H04W 12/06 (2009.01); H04W 24/04 (2009.01); H04L 29/06 (2006.01); H04L 29/08 (2006.01); H04W 36/16 (2009.01);
U.S. Cl.
CPC ...
H04L 65/1073 (2013.01); H04L 65/105 (2013.01); H04L 65/1006 (2013.01); H04L 65/1016 (2013.01); H04L 65/80 (2013.01); H04L 67/1034 (2013.01); H04W 12/04 (2013.01); H04W 12/06 (2013.01); H04W 24/04 (2013.01);
Abstract
A method in an IP multimedia subsystem, IMS, of a telecommunications network. The loss of a secure association between a P-CSCF of the IMS and a user equipment, UE, served by the P-CSCF is detected, or a UE is relocated from a further P-CSCF to the first mentioned P-CSCF. The first mentioned P-CSCF sends a reregistration request to the UE; receives a SIP REGISTER message from the UE; and performs P-CSCF registration with the UE including establishing a new secure association with the UE.