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:
Nov. 24, 2009
Filed:
Jul. 14, 2004
Shinichiro Motoyoshi, Tokyo, JP;
Hiroshi Kitamura, Tokyo, JP;
Masataka Nagura, Tokyo, JP;
Kazuhiko Harasaki, Tokyo, JP;
Shinichiro Motoyoshi, Tokyo, JP;
Hiroshi Kitamura, Tokyo, JP;
Masataka Nagura, Tokyo, JP;
Kazuhiko Harasaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A communication network system has a plurality of interconnected sub-networks, at least one mobile node having a care-of address dependent on a sub-network currently connected thereto and a home address independent of the connected sub-network, and a home agent. Upon detection of a sub-network connected to the mobile node, the latter determines a security method corresponding to the sub-network held in a node-side security application management table as a security method for ensuring the security for user data communicated between the mobile node and a home agent associated therewith. Then, the sub-network is notified to the home agent through a mobile node network signal. The home agent determines a security method corresponding to the sub-network from among security methods held in an agent-side security application management table as a security method used for ensuring the security for user data communicated between the home agent and the mobile node managed thereby.