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:
Oct. 01, 2013
Filed:
Dec. 01, 2008
Luis Barriga, Johanneshov, SE;
Rolf Blom, Jarfalla, SE;
Yi Cheng, Sundbyberg, SE;
Fredrik Lindholm, Alvsjo, SE;
Mats Naslund, Bromma, SE;
Karl Norrman, Stockholm, SE;
Luis Barriga, Johanneshov, SE;
Rolf Blom, Jarfalla, SE;
Yi Cheng, Sundbyberg, SE;
Fredrik Lindholm, Alvsjo, SE;
Mats Naslund, Bromma, SE;
Karl Norrman, Stockholm, SE;
Telefonaktiebolaget L M Ericsson, Stockholm, SE;
Abstract
An IMS system includes an IMS initiator user entity. The system includes an IMS responder user entity that is called by the initiator user entity. The system includes a calling side S-CSCF in communication with the caller entity which receives an INVITE having a first protection offer and parameters for key establishment from the caller entity, removes the first protection offer from the INVITE and forwards the INVITE without the first protection offer. The system includes a receiving end S-CSCF in communication with the responder user entity and the calling side S-CSCF which receives the INVITE without the first protection offer and checks that the responder user entity supports the protection, inserts a second protection offer into the INVITE and forwards the INVITE to the responder user entity, wherein the responder user entity accepts the INVITE including the second protection offer and answers with an acknowledgment having a first protection accept. A method for supporting a call by a telecommunications node.