Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 31, 2019
Patent Application Number
15553259
Date Filed
February 27, 2015
Patent Citations
Patent Citations Received
Patent Primary Examiner
Patent 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.
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