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:
May. 05, 2015
Filed:
Sep. 11, 2007
Ashutosh Dutta, Bridgewater, NJ (US);
Abhrajit Ghosh, Edison, NJ (US);
Subir Das, Kendall Park, NJ (US);
Fuchun Joesph Lin, Morris Plains, NJ (US);
Kyriakos Manousakis, New Brunswick, NJ (US);
Dana Chee, Maplewood, NJ (US);
Tsunehiko Chiba, Saitama, JP;
Hidetoshi Yokota, Minuma, JP;
Akira Idoue, Toda, JP;
Ashutosh Dutta, Bridgewater, NJ (US);
Abhrajit Ghosh, Edison, NJ (US);
Subir Das, Kendall Park, NJ (US);
Fuchun Joesph Lin, Morris Plains, NJ (US);
Kyriakos Manousakis, New Brunswick, NJ (US);
Dana Chee, Maplewood, NJ (US);
Tsunehiko Chiba, Saitama, JP;
Hidetoshi Yokota, Minuma, JP;
Akira Idoue, Toda, JP;
Telcordia Technologies, Inc., Piscataway, NJ (US);
Abstract
A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. Methods for mitigating delay during SA re-association and mitigating the IPSec tunnel overhead for signaling and media at the Mobile Node are given. In one embodiment, SA keys can be transferred from the old P-CSCF to new P-CSCF, enabling the establishment of SAs before Mobile Node physically moves to the new subnet in a network. Proactive handover is used. In another embodiment, SA keys are transferred from S-CSCF to new P-CSCF. In this case, the SA keys are transferred to the new P-CSCF by S-CSCF through a context transfer mechanism well in advance so that SAs may be established before Mobile Node physically moves to new subnet. In another embodiment, methods for mitigating IPSec tunnel overhead are presented.