P-CSCF fast handoff for IMS/MMS architecture

US8098627B2 · kind B2 · utility

Assignees

• Telcordia Technologies, Inc. · US
• KDDI CORPORATION · JP

Inventors

• Ashutosh Dutta · Bound Brook, US
• Abhrajit Ghosh · Edison, US
• Subir Das · Kendall Park, US
• Dana Chee · Maplewood, US
• Kyriakos Manousakis · New Brunswick, US
• Funchun Joseph Lin · Morristown, US
• Shih-Wei Li · Taipei, TW
• Tsunehiko Chiba · Tokyo, JP
• Hidetoshi Yokota · Kawasaki, JP
• Akira Idoue · Toda, JP

Key dates

• Filing date: Sep 11, 2007
• Grant date: Jan 17, 2012
• Expiry date: Aug 18, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W80/10
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

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. One proactive method includes proactive authentication. Another proactive method includes proactive security association, such as transferring SA keys from old proxy to new proxy, or transferring keys through serving signal entities. Reactive methods include transferring SA keys from old proxy to new proxy, using either push or pull technology. Other reactive methods include transferring keys through serving signal entities using either push or pull technology.